CA2298186A1 - Garage door roller assembly - Google Patents
Garage door roller assembly Download PDFInfo
- Publication number
- CA2298186A1 CA2298186A1 CA 2298186 CA2298186A CA2298186A1 CA 2298186 A1 CA2298186 A1 CA 2298186A1 CA 2298186 CA2298186 CA 2298186 CA 2298186 A CA2298186 A CA 2298186A CA 2298186 A1 CA2298186 A1 CA 2298186A1
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- CA
- Canada
- Prior art keywords
- roller
- distal
- segment
- proximal
- stem
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 239000000463 material Substances 0.000 claims abstract description 15
- 230000007704 transition Effects 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims 1
- 241001131688 Coracias garrulus Species 0.000 description 69
- 239000002184 metal Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Support Devices For Sliding Doors (AREA)
- Gates (AREA)
Abstract
A garage door roller assembly includes a stem and a roller composed of a polymeric material. The stem has a shaft segment which may be mounted to the garage door such that a race segment of the stem is positioned at a distance from the side edge of the door. A shoulder portion of the roller extends radially inward from the inside surface of the roller and is disposed within a circumferential groove on the race segment to retain the roller on the stem. An outer portion of the roller engages an L-shaped track positioned on the side of the entry way.
Description
GARAGE DOOR ROLLER ASSEMBLY
Background of the Invention This invention relates generally to roll-up or upwardly-acting overhead doors. More particularly, the present invention relates to a roller assembly intended for use on a garage overhead door.
Upwardly-acting overhead doors are commonly utilized as garage doors and conventionally employ a plurality of door sections which are hinged together. Such overhead doors are generally supported on a pair of L-shaped tracks for permitting the door to move upwardly from a substantially vertical closed position to a substantially horizontal opened position. To permit this opening and closing movement, the garage door is provided with a plurality of roller support units disposed adjacent the side edges of the door. A roller of each roller support unit is rollingly engaged with and supported by the stationary L-shaped track. Commonly, the roller support unit also includes a pair of hinge halves which are fixed to the adjacent door sections and disposed in opposed relationship. The hinge halves support a metal hinge tube in which the stem of the roller is received.
The roller of many conventional roller support units is composed of metal and the metal-to-metal contact between the roller and the L-shaped track produces a large amount of undesirable noise when the door moves one position to another. In addition, such roller support units are generally composed of ordinary steel to minimize the material cost. Although the roller support units are generally installed on the interior side of the overhead door, they receive significant exposure to the elements and are subject to rust and other corrosion problems. Such corrosion increases the amount of noise produced by the door and can lead to failure of the roller support unit.
In an attempt to improve upon the above-described roller support unit, some conventional roller support units are provided with plastic rollers which are rotatably mounted on a metal roller stem. The amount of noise produced by such roller support units is lower than that produced by roller support units having metal rollers. In addition, the plastic rollers are not subject to _2_ corrosion. However, these roller support units are generally more expensive to manufacture than the all-steel roller units and therefore are not cost competitive.
Summary of the Invention Briefly stated, the invention in a preferred form is a garage door roller assembly which includes a stem and a roller composed of a polymeric material. The stem has a shaft segment and a race segment. The shaft segment is mounted to the garage door such that the race segment is positioned at a distance from the side edge of the door. A shoulder portion of the roller extends radially inward from the inside surface of the roller and is disposed within a circumferential groove on the race segment. An outer portion of the roller engages an L-shaped track positioned on the side of the entry way.
Preferably, the stem and the roller are each unitary, one-piece units, the stem is composed of fiberglass reinforced nylon, and the roller is composed of impact enhanced nylon.
The race segment includes a distal rim portion and a distal ramp surface which are separated from a proximal rim portion and a proximal ramp surfaces by the groove. The distal and proximal ramp surfaces extend from the outside surfaces of the distal and proximal rim portions, respectively, to the outside surface of the groove. The roller includes distal and proximal ramp surfaces which are positioned oppositely the distal and proximal ramp surfaces of the race segment, respectively. The race segment further has a ramp surface extending from the outside surface of the distal rim portion to the distal end surface of the race segment. During installation of the roller on the stem, the proximal ramp surface of the roller slides up the ramp of the race segment, elastically stretching the roller. When the shoulder portion of the roller is positioned opposite to the groove, the roller returns to its original size, inserting the shoulder portion into the groove to retain the roller on the stem.
It is an object of the invention to provide a new and improved roller assembly for an overhead door.
It is also an object of the invention to provide a new and improved roller assembly which is not subject to corrosion and which produces less noise during operation.
It is further an object of the invention to provide a new and improved roller assembly which may be manufactured inexpensively.
Other objects and advantages of the invention will become apparent from the drawings and specification.
Brief Description of the Drawings The present invention may be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the accompanying drawings in which:
Figure 1 is an elevational view, partly in phantom, of a garage door having a roller assembly in accordance with the invention;
Figure 2 is an enlarged perspective view of the roller assembly of Figure 1;
Figure 3 is a cross-sectional view of the roller assembly of Figure 2;
Figure 4 is an enlarged cross-section view of area 4 of Figure 3; and Figure 5 is a perspective view, partly in phantom, of the roller of the roller assembly of Figure 2.
Detailed Description of the Preferred Embodiment With reference to the drawings wherein like numerals represent like parts throughout the several figures, a garage door roller assembly in accordance with the present invention is generally designated by the numeral 10. Each roller assembly 10 includes a roller 12 which is rotatably mounted on the race segment 13 of a stem 14. A number of the roller assemblies 10 are mounted to the interior surface 16 of the garage door 18 along each side edge 20 such that the race segment 13 extends beyond the side edge 20 of the door 18 and the rollers 12 are positioned at a substantially uniform distance 22 from the side edge 20 of the door 18. The rollers 12 on each side of the garage door 18 are rollingly engaged with and supported by one of a pair of stationary L-shaped tracks 24. The L-shape of the tracks 24 permits the door 18 to move upwardly from a substantially vertical, closed position to a substantially horizontal, opened position.
Conventionally, garage doors 18 employ a plurality of door sections 26, 26' which are hinged together. The pair of hinge halves 28 which are used to join adjacent door sections 26, 26' commonly support a metal hinge tube 30 in which the stem 14 of the roller assembly 10 is received. Typically the stem 14 may act as a pivot pin to join the hinge halves 28 together, permitting rotational movement between the hinge halves 28 and the door sections 26, 26' mounted on the hinge halves 28.
The stem 14 of the roller assembly 10 is a unitary, one-piece unit, manufactured from a high-strength polymeric material. In a preferred embodiment, the stem 14 is manufactured in a casting process from a fiberglass reinforced nylon material. The stem 14 includes a columnar shaft segment 32 and a race segment 13. Since the roller assembly 10 is intended to be interchangeable with conventional roller support units, the outside diameter 34 and length 36 of the shaft segment 32 are selected such that it will fit properly within conventional hinge tubes 30. In the embodiment shown in Figures 2 and 3, a transition segment 38 is disposed intermediate the shaft segment 32 and the race segment 13. The outside diameter of the transition segment 38 is greater than the outside diameter 34 of the shaft segment 32 to provide additional strength to the stem 14.
The combined length of the shaft segment 32 and the transition segment 38 (36 + 40) are selected such that the race segment 13 will be properly positioned in the L-shaped track 24 of a conventional garage door. As shown in Figure 2, the shaft segment 32 and the transition segment 38 each include a plurality of lightening recesses 42. The recesses 42 reduce the amount of polymeric material which is required to form the stem 14 without appreciably reducing the mechanical strength of the stem 14.
With reference to Figure 4, the race segment 13 has a substantially circular, circumferential groove 44 disposed intermediate the distal end and proximal end surfaces 46, 48 of the race segment 13. Preferably, the groove 44 is positioned substantially equidistantly from the distal end and proximal end surfaces 46, 48. The groove 44 defines substantially circular distal and proximal rim portions 50, 52. The outside surfaces 54, 56 of the distal and proximal rim portions 50, 52 have substantially equal diameters.
The proximal face 58 of the distal rim portion 50 and the distal face 60 of the proximal rim portion 52 each forms an inclined surface extending from a respective rim portion outside surface 54, 56 to the outside surface 62 of the groove 44. The distal face 64 of the distal rim portion 50 forms a ramp which extends laterally and longitudinally from the outside surface 54 of the distal rim portion 50 to the distal end surface 46 of the race segment 13.
The race segment 13 may also have one or more lightening recesses which also serve to reduce the amount of polymeric material required to form the stem 14 without appreciably reducing the mechanical strength.
The roller 12 of the roller assembly 10 is a unitary, one-piece unit, manufactured from an impact resistant polymeric material. In a preferred embodiment, the roller 12 is manufactured in a casting process from an impact-enhanced nylon material. The roller 12 includes an outer portion 66 that engages the L-shaped track 24 and a shoulder portion 68 that is disposed within the groove 44 of the race segment 13 of the stem 14. The outer surface 70 of the outer portion 66 has a substantially semi-circular shape when viewed in cross-section. As shown in Figure 4, an intermediate portion 72 may be disposed between the outer portion 66 and the shoulder portion 68. Distal and proximal ramp surfaces 74, 76 extend from the inside surface 78 of the intermediate portion 72 to the inside surface 80 of the shoulder portion 68. The slope (ratio of the rise to the run) of ramp surfaces 74, 76 are substantially equal to the slope of the ramps 58, 60 of the race segment 13. The outside diameters of rim portions and groove and the inside diameters of intermediate portion and shoulder are selected such that a gap 82 is defined between the race segment 13 and the roller 12. In a preferred embodiment this gap 82 is substantially uniform between the opposed surfaces of the stem and the roller and has a value of 0.010 inches.
The roller 12 is installed on the race segment 13 by sliding the proximal part 84 of the roller 12 over the distal rim portion 50 of the race segment 13 until the proximal ramp surface 76 engages ramp 64 of the race segment 13.
Additional pressure on the roller 12 will cause the proximal ramp surface 76 to slide up the ramp 64 of the race segment 13, elastically stretching the roller 12, until the inside surface 80 of the shoulder portion 68 is disposed around outside surface 54 of the distal rim portion 50. Continued pressure on the roller 12 will cause the inside surface 80 of the shoulder portion 68 to slide along the outside surface 54 of the distal rim portion 50 until the shoulder portion 68 is positioned over the groove 44. At that point the roller 12 will return to its original shape and the shoulder portion 68 of the roller 12 will extend radially into the groove 44 of the race segment 13 of the stem 14, thereby retaining the roller 12 on the stem 14. In a preferred embodiment, a layer of grease 86 is applied to the ramp surfaces 74, 76 and inside surfaces 80, 78 of the shoulder 68 and intermediate portions 72 before the roller 12 is installed on the stem 14.
It should be appreciated that a roller assembly 10 in accordance with the invention does not include any metallic components which may corrode and thereby degrade the operation and mechanical integrity of the assembly 10. Further, the use of polymeric material for both the roller 12 and the stem 14 greatly reduces the amount of noise that is produced during _ 7 _ movement of the garage door 18. Since a separate fastener is not required to mount the roller 12 to the stem 14, the cost of manufacturing the subject roller assembly 10 is competitive with the cost of manufacturing conventional roller support units.
While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation.
Background of the Invention This invention relates generally to roll-up or upwardly-acting overhead doors. More particularly, the present invention relates to a roller assembly intended for use on a garage overhead door.
Upwardly-acting overhead doors are commonly utilized as garage doors and conventionally employ a plurality of door sections which are hinged together. Such overhead doors are generally supported on a pair of L-shaped tracks for permitting the door to move upwardly from a substantially vertical closed position to a substantially horizontal opened position. To permit this opening and closing movement, the garage door is provided with a plurality of roller support units disposed adjacent the side edges of the door. A roller of each roller support unit is rollingly engaged with and supported by the stationary L-shaped track. Commonly, the roller support unit also includes a pair of hinge halves which are fixed to the adjacent door sections and disposed in opposed relationship. The hinge halves support a metal hinge tube in which the stem of the roller is received.
The roller of many conventional roller support units is composed of metal and the metal-to-metal contact between the roller and the L-shaped track produces a large amount of undesirable noise when the door moves one position to another. In addition, such roller support units are generally composed of ordinary steel to minimize the material cost. Although the roller support units are generally installed on the interior side of the overhead door, they receive significant exposure to the elements and are subject to rust and other corrosion problems. Such corrosion increases the amount of noise produced by the door and can lead to failure of the roller support unit.
In an attempt to improve upon the above-described roller support unit, some conventional roller support units are provided with plastic rollers which are rotatably mounted on a metal roller stem. The amount of noise produced by such roller support units is lower than that produced by roller support units having metal rollers. In addition, the plastic rollers are not subject to _2_ corrosion. However, these roller support units are generally more expensive to manufacture than the all-steel roller units and therefore are not cost competitive.
Summary of the Invention Briefly stated, the invention in a preferred form is a garage door roller assembly which includes a stem and a roller composed of a polymeric material. The stem has a shaft segment and a race segment. The shaft segment is mounted to the garage door such that the race segment is positioned at a distance from the side edge of the door. A shoulder portion of the roller extends radially inward from the inside surface of the roller and is disposed within a circumferential groove on the race segment. An outer portion of the roller engages an L-shaped track positioned on the side of the entry way.
Preferably, the stem and the roller are each unitary, one-piece units, the stem is composed of fiberglass reinforced nylon, and the roller is composed of impact enhanced nylon.
The race segment includes a distal rim portion and a distal ramp surface which are separated from a proximal rim portion and a proximal ramp surfaces by the groove. The distal and proximal ramp surfaces extend from the outside surfaces of the distal and proximal rim portions, respectively, to the outside surface of the groove. The roller includes distal and proximal ramp surfaces which are positioned oppositely the distal and proximal ramp surfaces of the race segment, respectively. The race segment further has a ramp surface extending from the outside surface of the distal rim portion to the distal end surface of the race segment. During installation of the roller on the stem, the proximal ramp surface of the roller slides up the ramp of the race segment, elastically stretching the roller. When the shoulder portion of the roller is positioned opposite to the groove, the roller returns to its original size, inserting the shoulder portion into the groove to retain the roller on the stem.
It is an object of the invention to provide a new and improved roller assembly for an overhead door.
It is also an object of the invention to provide a new and improved roller assembly which is not subject to corrosion and which produces less noise during operation.
It is further an object of the invention to provide a new and improved roller assembly which may be manufactured inexpensively.
Other objects and advantages of the invention will become apparent from the drawings and specification.
Brief Description of the Drawings The present invention may be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the accompanying drawings in which:
Figure 1 is an elevational view, partly in phantom, of a garage door having a roller assembly in accordance with the invention;
Figure 2 is an enlarged perspective view of the roller assembly of Figure 1;
Figure 3 is a cross-sectional view of the roller assembly of Figure 2;
Figure 4 is an enlarged cross-section view of area 4 of Figure 3; and Figure 5 is a perspective view, partly in phantom, of the roller of the roller assembly of Figure 2.
Detailed Description of the Preferred Embodiment With reference to the drawings wherein like numerals represent like parts throughout the several figures, a garage door roller assembly in accordance with the present invention is generally designated by the numeral 10. Each roller assembly 10 includes a roller 12 which is rotatably mounted on the race segment 13 of a stem 14. A number of the roller assemblies 10 are mounted to the interior surface 16 of the garage door 18 along each side edge 20 such that the race segment 13 extends beyond the side edge 20 of the door 18 and the rollers 12 are positioned at a substantially uniform distance 22 from the side edge 20 of the door 18. The rollers 12 on each side of the garage door 18 are rollingly engaged with and supported by one of a pair of stationary L-shaped tracks 24. The L-shape of the tracks 24 permits the door 18 to move upwardly from a substantially vertical, closed position to a substantially horizontal, opened position.
Conventionally, garage doors 18 employ a plurality of door sections 26, 26' which are hinged together. The pair of hinge halves 28 which are used to join adjacent door sections 26, 26' commonly support a metal hinge tube 30 in which the stem 14 of the roller assembly 10 is received. Typically the stem 14 may act as a pivot pin to join the hinge halves 28 together, permitting rotational movement between the hinge halves 28 and the door sections 26, 26' mounted on the hinge halves 28.
The stem 14 of the roller assembly 10 is a unitary, one-piece unit, manufactured from a high-strength polymeric material. In a preferred embodiment, the stem 14 is manufactured in a casting process from a fiberglass reinforced nylon material. The stem 14 includes a columnar shaft segment 32 and a race segment 13. Since the roller assembly 10 is intended to be interchangeable with conventional roller support units, the outside diameter 34 and length 36 of the shaft segment 32 are selected such that it will fit properly within conventional hinge tubes 30. In the embodiment shown in Figures 2 and 3, a transition segment 38 is disposed intermediate the shaft segment 32 and the race segment 13. The outside diameter of the transition segment 38 is greater than the outside diameter 34 of the shaft segment 32 to provide additional strength to the stem 14.
The combined length of the shaft segment 32 and the transition segment 38 (36 + 40) are selected such that the race segment 13 will be properly positioned in the L-shaped track 24 of a conventional garage door. As shown in Figure 2, the shaft segment 32 and the transition segment 38 each include a plurality of lightening recesses 42. The recesses 42 reduce the amount of polymeric material which is required to form the stem 14 without appreciably reducing the mechanical strength of the stem 14.
With reference to Figure 4, the race segment 13 has a substantially circular, circumferential groove 44 disposed intermediate the distal end and proximal end surfaces 46, 48 of the race segment 13. Preferably, the groove 44 is positioned substantially equidistantly from the distal end and proximal end surfaces 46, 48. The groove 44 defines substantially circular distal and proximal rim portions 50, 52. The outside surfaces 54, 56 of the distal and proximal rim portions 50, 52 have substantially equal diameters.
The proximal face 58 of the distal rim portion 50 and the distal face 60 of the proximal rim portion 52 each forms an inclined surface extending from a respective rim portion outside surface 54, 56 to the outside surface 62 of the groove 44. The distal face 64 of the distal rim portion 50 forms a ramp which extends laterally and longitudinally from the outside surface 54 of the distal rim portion 50 to the distal end surface 46 of the race segment 13.
The race segment 13 may also have one or more lightening recesses which also serve to reduce the amount of polymeric material required to form the stem 14 without appreciably reducing the mechanical strength.
The roller 12 of the roller assembly 10 is a unitary, one-piece unit, manufactured from an impact resistant polymeric material. In a preferred embodiment, the roller 12 is manufactured in a casting process from an impact-enhanced nylon material. The roller 12 includes an outer portion 66 that engages the L-shaped track 24 and a shoulder portion 68 that is disposed within the groove 44 of the race segment 13 of the stem 14. The outer surface 70 of the outer portion 66 has a substantially semi-circular shape when viewed in cross-section. As shown in Figure 4, an intermediate portion 72 may be disposed between the outer portion 66 and the shoulder portion 68. Distal and proximal ramp surfaces 74, 76 extend from the inside surface 78 of the intermediate portion 72 to the inside surface 80 of the shoulder portion 68. The slope (ratio of the rise to the run) of ramp surfaces 74, 76 are substantially equal to the slope of the ramps 58, 60 of the race segment 13. The outside diameters of rim portions and groove and the inside diameters of intermediate portion and shoulder are selected such that a gap 82 is defined between the race segment 13 and the roller 12. In a preferred embodiment this gap 82 is substantially uniform between the opposed surfaces of the stem and the roller and has a value of 0.010 inches.
The roller 12 is installed on the race segment 13 by sliding the proximal part 84 of the roller 12 over the distal rim portion 50 of the race segment 13 until the proximal ramp surface 76 engages ramp 64 of the race segment 13.
Additional pressure on the roller 12 will cause the proximal ramp surface 76 to slide up the ramp 64 of the race segment 13, elastically stretching the roller 12, until the inside surface 80 of the shoulder portion 68 is disposed around outside surface 54 of the distal rim portion 50. Continued pressure on the roller 12 will cause the inside surface 80 of the shoulder portion 68 to slide along the outside surface 54 of the distal rim portion 50 until the shoulder portion 68 is positioned over the groove 44. At that point the roller 12 will return to its original shape and the shoulder portion 68 of the roller 12 will extend radially into the groove 44 of the race segment 13 of the stem 14, thereby retaining the roller 12 on the stem 14. In a preferred embodiment, a layer of grease 86 is applied to the ramp surfaces 74, 76 and inside surfaces 80, 78 of the shoulder 68 and intermediate portions 72 before the roller 12 is installed on the stem 14.
It should be appreciated that a roller assembly 10 in accordance with the invention does not include any metallic components which may corrode and thereby degrade the operation and mechanical integrity of the assembly 10. Further, the use of polymeric material for both the roller 12 and the stem 14 greatly reduces the amount of noise that is produced during _ 7 _ movement of the garage door 18. Since a separate fastener is not required to mount the roller 12 to the stem 14, the cost of manufacturing the subject roller assembly 10 is competitive with the cost of manufacturing conventional roller support units.
While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation.
Claims (18)
1. A roller assembly for an entry way including an upwardly-acting overhead door having oppositely disposed side edges, a first L-shaped track positioned on a first side of the entry way, and a second L-shaped track positioned on a second side of the entry way, the roller assembly comprising:
a stem composed of a polymeric material and having a shaft segment and a race segment, the race segment defining a circumferential groove, the shaft segment being mountable to the door wherein the race segment is positioned at a distance from one of the side edges; and a roller composed of a polymeric material, the roller having a shoulder portion disposed within the groove of the race segment of the stem and an outer portion engageable with the track.
a stem composed of a polymeric material and having a shaft segment and a race segment, the race segment defining a circumferential groove, the shaft segment being mountable to the door wherein the race segment is positioned at a distance from one of the side edges; and a roller composed of a polymeric material, the roller having a shoulder portion disposed within the groove of the race segment of the stem and an outer portion engageable with the track.
2. The roller assembly of claim 1 wherein the stem is a unitary, one-piece unit and the roller is a unitary, one-piece unit.
3. The roller assembly of claim 1 wherein the race segment includes distal and proximal end surfaces and the groove is positioned substantially equidistantly from the distal and proximal end surfaces, defining proximal and distal rim portions.
4. The roller assembly of claim 3 wherein the proximal and distal rim portions each have proximal and distal end faces, the proximal end face of the distal rim portion and the distal end face of the proximal rim portion having first and second bevels, respectively.
5. The roller assembly of claim 4 wherein the proximal and distal rim portions and the groove each have an outside surface, the first and second bevels defining distal and proximal ramp surfaces extending from the outside surfaces of the distal and proximal rim portions to the outside surface of the groove, respectively.
6. The roller assembly of claim 5 wherein the distal end face of the distal rim portion has a ramp surface extending from the outside surface of the distal rim portion to the distal end surface of the race segment.
7. The roller assembly of claim 5 wherein the shoulder portion of the roller includes distal and proximal ramp surfaces, the distal and proximal ramp surfaces of the race segment and the distal and proximal ramp surfaces of the roller each having a ratio of a rise to a run, the ratio of the rise to the run of the distal and proximal ramp surfaces of the roller being substantially equal to the ratio of the rise to the run of the distal and proximal ramp surfaces of the race segment, respectively.
8. The roller assembly of claim 1 wherein the roller further has an inside surface and the race segment has an outside surface, the inside surface of the roller and the outside surface of the race segment defining a gap.
9. The roller assembly of claim 8 further comprising a lubricant disposed within the gap.
10. The roller assembly of claim 1 wherein the stem is composed of fiberglass reinforced nylon and the roller is composed of impact enhanced nylon.
11. The roller assembly of claim 1 wherein the stem further defines at least one lightening recess.
12. The roller assembly of claim 1 wherein the stem further has a transition segment disposed intermediate the shaft segment and the race segment, the shaft segment and the transition segment each having an outside diameter, the outside diameter of the transition segment being greater than the outside diameter of the shaft segment.
13. A garage door roller assembly comprising:
a one-piece, unitary stem composed of a polymeric material and having a shaft segment and a race segment, the race segment having distal and proximal rim portions defining a circumferential groove disposed therebetween; and a one-piece, unitary roller composed of a polymeric material disposed around the race segment of the stem, the roller having a shoulder portion extending radially into the groove of the race segment of the stem for retaining the roller on the stem.
a one-piece, unitary stem composed of a polymeric material and having a shaft segment and a race segment, the race segment having distal and proximal rim portions defining a circumferential groove disposed therebetween; and a one-piece, unitary roller composed of a polymeric material disposed around the race segment of the stem, the roller having a shoulder portion extending radially into the groove of the race segment of the stem for retaining the roller on the stem.
14. An upwardly-acting overhead door for selectively opening and closing an entry way having oppositely disposed sides, the door comprising:
a plurality of door panels extending from one side edge to an opposite side edge, the side edges being positioned proximate the sides of the entry way;
a plurality of hinges, each of the hinges comprising a pair of pivotally connected hinge halves associated with a pair of adjacent door panels and a hinge tube, each of the hinge halves being mounted to a respective one of the door panels adjacent a side edge of the door panel;
a pair of L-shaped tracks, one of the tracks being mounted along one side of the entry way and the other track being mounted along the opposite side of the entry way; and a plurality of roller assemblies, each of the roller assemblies comprising a stem and a roller composed of a polymeric material, the stem having a shaft segment and a race segment, at least a portion of the shaft segment being disposed within the hinge tube, the race segment being positioned at a distance from the side edge and defining a circumferential groove, the roller having a shoulder portion disposed within the groove of the race segment of the stem and an outer portion rollingly engaged with the track.
a plurality of door panels extending from one side edge to an opposite side edge, the side edges being positioned proximate the sides of the entry way;
a plurality of hinges, each of the hinges comprising a pair of pivotally connected hinge halves associated with a pair of adjacent door panels and a hinge tube, each of the hinge halves being mounted to a respective one of the door panels adjacent a side edge of the door panel;
a pair of L-shaped tracks, one of the tracks being mounted along one side of the entry way and the other track being mounted along the opposite side of the entry way; and a plurality of roller assemblies, each of the roller assemblies comprising a stem and a roller composed of a polymeric material, the stem having a shaft segment and a race segment, at least a portion of the shaft segment being disposed within the hinge tube, the race segment being positioned at a distance from the side edge and defining a circumferential groove, the roller having a shoulder portion disposed within the groove of the race segment of the stem and an outer portion rollingly engaged with the track.
15. The roller assembly of claim 14 wherein the each of the stems has an outside diameter and each of the hinge tubes has an inside diameter, the inside diameter of the hinge tube being greater than the outside diameter of the stem.
16. The roller assembly of claim 14 wherein the race segment includes distal and proximal rim portions and distal and proximal ramp surfaces, the groove being disposed intermediate the distal and proximal end portions, the groove and distal end portions each having an outside surface, the distal and proximal ramp surfaces extending from the outside surfaces of the distal and proximal rim portions to the outside surface of the groove, respectively.
17. The roller assembly of claim 16 wherein the race segment has a distal surface and a ramp surface extending from the outside surface of the distal rim portion to the distal end surface of the race segment.
18. The roller assembly of claim 16 wherein the shoulder portion of the roller includes distal and proximal ramp surfaces disposed oppositely the distal and proximal ramp surfaces of the race segment, respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25515599A | 1999-02-22 | 1999-02-22 | |
| US09/255,155 | 1999-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2298186A1 true CA2298186A1 (en) | 2000-08-22 |
Family
ID=22967081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2298186 Abandoned CA2298186A1 (en) | 1999-02-22 | 2000-02-09 | Garage door roller assembly |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1264783A (en) |
| CA (1) | CA2298186A1 (en) |
| TW (1) | TW436573B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100730A1 (en) * | 2004-04-15 | 2005-10-27 | B & D Australia Pty Ltd | Fascia assembly |
| AU2008202495B2 (en) * | 2004-04-15 | 2009-05-28 | B & D Australia | Fascia assembly |
| CN102764717A (en) * | 2012-07-30 | 2012-11-07 | 中材科技（南通）有限公司 | Graphite smearing device with novel rollers |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505475B (en) * | 2018-11-29 | 2024-04-09 | 和拓(深圳)工业设计有限公司 | Anti-swing wheel on limiting pulley and sliding door |
-
2000
- 2000-02-09 CA CA 2298186 patent/CA2298186A1/en not_active Abandoned
- 2000-02-11 TW TW89102329A patent/TW436573B/en not_active IP Right Cessation
- 2000-02-21 CN CN 00104871 patent/CN1264783A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100730A1 (en) * | 2004-04-15 | 2005-10-27 | B & D Australia Pty Ltd | Fascia assembly |
| AU2008202495B2 (en) * | 2004-04-15 | 2009-05-28 | B & D Australia | Fascia assembly |
| CN102764717A (en) * | 2012-07-30 | 2012-11-07 | 中材科技（南通）有限公司 | Graphite smearing device with novel rollers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1264783A (en) | 2000-08-30 |
| TW436573B (en) | 2001-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |