US2618105A - Valve grinder - Google Patents

Description

Nov. 18, 1952 A. H. ANDERSON 2,6l`8}105 VALVE GRINDER 'iled April zo, 195o I so 9? 30 29x32 6264 [el 95 96 38 '7 38 l5 33 V f 33 25 28 4| 42 43 8 7 n umn "I .mmm MI- lll .il

ARTHUR H. ANDERSON @0MM FIGB ATT RNEYs Patented Nov. 18, 1952 61ans UNITED 'STATES "PATENT OFFICE *2,618,105 vALv-E GRINDER rthur H. Anderson, Lakeville, Minn.

Application April 20, 195o, serial No. 157,101

'4 Claims. 1

grinders and --has for an object to provide a valve grinder by .means of which a valve such asused with automobile engines may be ground to form a surface absolutely concentric with the 'axis yof the valve stem.

Another object of the invention Aresides in pro'- viding a valve grinder in which the valve is supported forrotation by means of bearings directly engaging thevalve stem of the valve.

A still further object of the invention resides in constructing the bearings as blockshaving V- shaped notches in which the valve stem is rotatable and in further utilizing an arm engaging the valve stern and spring biased to urge the stem into said bearings.

An object of the invention resides in providing a power Idriven grinding wheel guided for movement past the surface to be ground and in further providingan adjustable end stop for engagement with the end of the valve stem to limit the depth of ythe grinding.

still further object of the invention resides in forming said stop as a screw adjustable by rotation to limit the movement of the valve stem along its bearings.

Another object of the vinvention resides in providing a driven shaft substantially coaxially disposed with reference to the axis of the valve stem and situated opposite the valve head and in forming said shaft with a longitudinally extending hole, made square at one end, and in further providing a spindle slidable along said hole and having a square portion fitting the square portion of said hole and being driven thereby.

Another object of the invention resides in providing a driving member at the end lof said spindle, preferably of a exible material such as rubber or the like, and f rictionally engaging the valve head to rotate the valve and in further providing in said hole a compression coil spring engaging saidspindleand urging said driving member against said valve head.

The structure shown in the drawings consists of a base on which is mounted va support for a valve. Ihis support comprises two bearings havingV-shaped notches therein for the reception of the valve stem. A swinging arm spring biased into engagement with the valvestem holds the valve 'stem rotatable in said V-'shaped notches. An adjustable end stop engages the end of the valve stem and holds the valve in adjusted position. The valveis rotated by means of a spindle slidably mounted in a longitudinal extending hole i dl/ hft: This Shaft iS in substantial -2 alignment with the valve stem and a 'square portion on the spindle and engaging a square end of said shaft drives the spindle. The spindle is provided with a cup-shaped friction member preferably constructed of rubber or `other'resilient material which engages the valve head and -procures rotation thereof. A spring in the hole in the shaft engages the spindle and urges the driving member into engagement with the valve stem. The shaft is rotatedby means ofa motor and suitable reduction gearing For grinding the valve a grinding wheel is employed which is driven by a m-otor. rI he said wheel and motor are mounted as a unit for sliding movement so that the surface of the grinding wheel passes the Contact surface of the Valve and grinds the same.

In the drawings:

Fig. 1 is a plan View of a valve grinder illus- Vtratingan embodiment of the invention.

Fig. 2 is an elevational sectional View taken on line 2--2 of Fig. 1 and drawn to a greater scale,

VFig. 3 is alongitudinal elevational sectional v iew takenon line 3-3 of Fig. 1 and drawn toagreater scale.

FigylV i-s a cross sectional View taken on line lI-Q of Figi 1 and drawn to a greater scale.

The invention comprises a base I0 constructed of a plate of metal which is out to form an elongated portion I I withan angular portion I2 extending outwardly therefrom. `O'n theelongated portion I I is disposeda supportlwhich consists of a channel member 40 which 4has a web lil and flanges 4 2 projecting upwardly therefrom. The ends o f the flanges at the left of said support are cut away as shown in Fig, 1, whi1 e the web d l extends throughout the length ofthe support. The said support further comprises two anglemembers I l and I 5 These anglemembers have depending iianges I 6 and coplanar fianges il. The flanges I6 are welded to the web lll of channel member 4) by welds 8 and are so arranged that the edges of the vflanges I I form a groove I9 therebetween. Secured to one end of the web 4I of vchannel member O and t0 the ends of the angle members I4 and I5 isan'other angle member which has flanges 96 'and 91. The flange 96 overlies the web 4I while the flange 91 buts up against the ends of the ang'es IS of the angle members |13 and I5. All of these parts are welded together to stiffen and reinforce the support I3 and to maintain the spacing of the anges I'I of angle members I 4 and I5 forming the slot I9. The support I3 is pivotally attached to the base I9 by means of a cap screw 99. This cap screw extends through the web 4I of channel member 49 intermediate the ends thereof and is screwed into said base. In addition another cap screw 99 is employed which extends through an arcuate slot |98 formed in the flange 96 of angle member 95 and in the web 4I of channel member 4B and which is similarly screwed into base I8. This construction gives a limited angular adjustment of the entire support I3 for a purpose which subsequently will become readily apparent. Additional tapped holes may also be formed in the base I8 to permit of further adjustment of the angularity of the support I3 with reference to the base I9.

Mounted on the flanges I1 of angle members I4 and I are two bearings 20 and 2| which are formed with V-shaped notches 22. These bearings have threaded Shanks 23 which extend through the groove I9 and which have screwed on them nuts 24. By means of this construction the bearings 29 and 2| may be disposed along the support I3 at any locality therealong. The bearings 28 and 2| rotatably support a valve such as is indicated at 25. This valve has a valve stem 26 and a valve head 21 formed with a beveled contact surface 28. The valve is rotatably mounted in the bearings 29 and 2| by placing the valve stem 26 in the V-shaped notches 22 in the bearings 29 and 2 I.

For holding the valve stem 26 in the bearings 29 and 2| a swinging lever 29 is employed which is constructed from sheet metal bent U-shaped in form to provide a plate-like portion 39 with flanges 3i depending therefrom. A pintle 32 passes through the flanges 3| of lever 29 and through posts 33 welded to the flange I1 of angle member I5. The forward portions of the flanges 3I are adapted to engage the stem 26 and when the lever is swung in a, counter clockwise direction as viewed in Fig. 4 the valve stem is urged into the notches 22. A leaf spring 34 secured to the flange I6 of angle member I5 by means of screws 35 has a movable end 36 which engages the rearward edge of the plate-like portion 38 of lever 29 and ur-ges the same upwardly. This urges the forward portions of the flanges 3| downwardly and against the valve stem 26 to hold the same journaled in the bearings 2!) and 2|.

To limit longitudinal movement of the valve stem 26 along the bearings 20 and 2| an end stop 31 is employed. This stop consists of a screw which is screwed into two threaded posts 38 which are attached to the support I3. posts have parts IBI which extend through the slot I9 and which are secured to a bar |92 disposed below the flanges I1 of the angle members I4 and I5. A cap screw |83 extends through the slot I9 and is screwed into said bar. By means of this construction the end stop 31 may be further adjusted relative to the support I3. The inner end of the screw 31 engages the end of the valve stem 26 and restrains longitudinal movement of the valve stem in a direction toward the left as viewed in Fig. 1. A crank 39 or other turning device secured to the end of the screw 31 serves to rotate the same and procure accurate adjustment of the valve.

Mounted on the support I3 are two cross bars 44 which have bearings 43 secured to the same. These cross bars overlie the upper edges of the flanges 42 of channel member 40 and are Welded thereto. The bearings 43 have bores 45 which are in alignment with one another and substan- These tially in alignment with the axis of the valve stem 26. Rotatably mounted in these bearings is a shaft 46. This shaft has a longitudinally extending hole 41 in the same which is disposed in coaxial alignment with reference to the axis of said shaft. The forward portion of said hole is square as indicated at 48 while the rearward portion of said hole is constructed as a bore 49 of a diameter slightly greater than the diagonal dimension of the portion 48 of the said hole. In the hole 41 is slidably mounted a spindle |49 which is square and which engages the square portion 48 of said hole and is driven thereby. This spindle has formed on the end of it a knurled head 59 to which a driving member 5I is attached. This driving member is preferably constructed of resilient material such as rubber or the like and has a boss 52 apertured to receive the head 59 and secured thereto. The said driving head has a cup-shaped portion 53 formed with a contact surface 54 adapted to engage the face 55 of the valve head 21. A compression coil spring 56 is received within the bore 49 and is seated at one end against the said spindle |49. 'I'he other end of said spring is seated against a cctter pin 51 extending through the end of the shaft 46. Mounted on the shaft 46 between the bearings 43 is a sheave 58 which has a boss 59 on the same. The said boss is of a Width such as to t between the two bearings 43 and prevents endwise movement of the shaft 46. By means of this construction the driving member 5| is urged against the valve head 21 and the stem 26 against the end stop 31. 'Ihe boss 59 receives the reaction from the spring 56 against the cotter pin 51.

The sheave 58 may be driven by means of an electric motor 6I) mounted on the channel member 48 above the bearings 43. This motor has a reduction transmission which is enclosed within a housing 6| in the end of the said motor. This transmission includes a driven shaft 62 on which is mounted a sheave 63. A belt 64 passes over the sheave 63 and the sheave 58 and serves to drive the shaft 46 at a reduced rate of speed.

For grinding the surface 28 of the valve 25 a grinding unit 93 is employed. This grinding unit includes a grinding wheel 65 which is mounted on an arbor 66. This arbor is journaled in an elongated bearing 61 which is supported in the following manner: For the purpose a support 98 is employed which has two upright legs 69 and 1!) and a web 1I connected thereto. The bearing 61 is bolted by kmeans of bolts 12 to the web 1I. At the upper ends of the legs 69 and 18 are formed iianges 13 and 14 which lie in a common plane. These flanges support an'electric motor 15.k This motor has a base 16 and through which four bolts 'I1 extend. These bolts have their heads 15 welded to the flanges 13 and 14 and nuts 19 and 88 on said bolts engage the base 16 and hold the motor properly supported. The arbor 66 has a sheave BI mounted thereon while the armature shaft 82 of the motor 15 has a sheave 83 mounted thereon. A belt 84 passes over these sheaves and drives the arbor 66.

The unit 93 which comprises the motor 15 and the arbor 66 together with the whel 65 and bearings 61 and support 68 are mounted for sliding movement along the angular portion I2 of base I9. This is accomplished by means of two angle guides 85 which lie along the legs 69 and 18 and are bolted to the portion I2 of base I9 by means of cap screws 86 extending through said guides and screwed into the base I9. These guides are sufficiently free from the support 68 to permit of 5. freely' sliding thez unit. along; the; same. Moyement ofthe unitaisprocured' by means; oa lever 81. This. Ieveris pivoted. by means of a bolt, 8|!A toa bracket s'secured to the guide'85 by weld'- ing or otherwise. This lever has a slot all in the same through' which a pin 9| extends. The pin 9| is secured to the. flange 'I3 of the support 68. It. will readily be comprehended that swinging. .of the lever 8.1V will'l cause the entire unit 93 to move along the. guides 85 and cause the surface S2 of thewheel 65 to passand grind. the surface 28 of tlievalve head 21 of valve 25.

In operation the two bearings 25y and 2| are properly adjusted to support the valve stem 26 with' the valve head1 21 in. proper position to be ground by the wheel 615. The valve 215. is. then mounted and the. lever 2'9 brought to bear against. the valve stem Z5. In mounting thev valve 25v in the bearings; and 2|' the driving member 5| is moved towardthe right'. as viewed in Figs. 1 and 3 to bring the same out of Contact with the valve. Upon release of the said driving member, the spring 56 causes the said driving member to contact the face 55 of the valve head 21 and to force the end of the valve stem 26 into engagement with the stop 3l'. The angularity of the support I3 is next adjusted by loosening cap screws 93 and 99- and by shifting the said support bodily about the bolt 98 as a pivot until the surface' 28 of valve 25 is parallel with the guides 85. Bolts 58 and 99 are then tightened. The motor 69. is next energized and also the motor 15. The unit 53 is then slid along the guides 85 by means of lever 81 and the position of the valve Surface 28 adjusted by rotating screw 31 through the crank 39. As the valve is driven by the driving member 5| the same rotates accurately in the bearings 2U and 2| and the surface 28 is ground concentric with the axis of the said valve stem and at the proper angle. The V-notches 22 in the bearings 20 and 2| accommodate valve stems of slightly different diameters and the driving member 5| will .also drive a valve which is slightly out of alignment with the axis of the shaft 45. However, when valves having valve stems of greater variation are to be ground other bearings similar to the bearings 2|) and 2| may be employed and mounted in the groove I9. Likewise other driving members 5| of different sizes may be placed on the head 50 to correspond with different valve heads.

The advantages of the invention are apparent. The valve is ground absolutely concentric with the axis of the valve stem. I'his causes the valve to fit perfectly on the valve seat. With this invention the desired results are not dependent upon the accuracy of a chuck. The device can be constructed at less expense than similar valve grinders using chucks. The valve stem is rapidly mounted for rotation. The device can be adjusted to take various lengths of valve stems as well as valves and valve stems of different diameters. Also the angularity of the ground surface may be adjusted. Adjustment and operation of the device is extremely simple.

Changes in the specific form of the invention, as herein described, may be made within the scope of what is claimed without departing from the spirit of the invention.

Having described the invention, what is claimed as new and desired to be protected by Letters Patent is:

1. In a grinder for a valve having a stem and a head, a support, spaced bearings carried by said support and having aligning V-shaped notchesftherein for receiving and` supporting the saidV arm towardV said stemv and said stem into.

said notches, said stem being slidable relative to said arm, a grinding wheel rotatably supported with reference to said support, guide means carried 'by said support and guiding said grinding wheel for movement to cause the grinding surface ofthe` wheel to pass'the valve head contact surface and grind the same, an adjustable nonyieldable end stopy carried by the support and engageable with the free end of the valve stem to limit axial movement of the valve in a direction toward the free endof the valve stem, rotarydriving means carried by the support and engageable with said valve head to rotate the same, guide means on the support engaging and guiding' said drive means for axial movement and resilient means acting between said guide means and drive means for urging said drive means toward said Valvev and the valve stem against said end stop.

2. In a grinder for a valve having a stem and a head, a support, spaced bearings carried by said support and havingY aligning V-shaped notches therein for receiving and supporting the stem of, the valve for rotary and axial movement, an arm, guide means between said arm and support and guiding said arm for movement into and out of engagement with the valve stem, resilient means reacting against a part iixed relative to the support and engaging said arm for urging said arm toward said stem and said stem into said notches, said stem being slidable relative to said arm, a grinding wheel rotatably supported with reference to said support, guide means carried by said support and guiding said grinding wheel for movement to cause the grinding surface of the Wheel to pass the valve head contact surface and grind the same, an adjustable non-yieldable end stop carried by the support and engageable with the free end of the valve stem to limit axial movement of the valve in a `direction toward the free end of the valve stem, rotary driving means carried by the support and including a spindle revoluble about its axis, a driving member carried by the end of the spindle for frictionally engaging the end of the valve head, said valve head being slidable relative to said driving member in a direction transverse to the axis of said spindle and resilient means acting on said spindle for urging said driving member against said valve head and the valve stem against said end stop. v

3. In a grinder for a valve having a stem and a head, a support, spaced bearings carried by said support and having aligning V-shaped notches therein for receiving and supporting the stem of the valve for rotary and axial movement, an arm, guide means between said arm and support and guiding said arm for movement into and out of engagement with the valve stem, resilient means reacting against a part xed re1- ative to the support and engaging said arm for urging said arm toward said stem and said stem into said notches, said stem being slidable relative to said arm, a grinding wheel rotatably supported with reference to said support, guide means carried by said support and guiding said 7. grinding Wheel for movementl to cause the grinding surface of the Wheel to pass the valve head contact surface and grind the same, an adjustable non-yieldable end stop carried by the support and engageable with the free end of the valve stem to limit axial movement of the valve in a direction toward the free end of the valve stem, a shaft disposed substantially coaxially with reference to said valve stem, bearings therefor carried by said support, said shaft having a central longitudinal hole therein, a spindle disposed within said hole and slidable axially with respect to said shaft, a resilient cup carried by said spindle and having a surface for engaging the valve head, means acting between said shaft and spindle and restraining relative rotational movement therebetween and resilient means within said hole and engaging said spindle for urging said cup against said valve head.

4. In a grinder for a valve having a stem and a head, a support, spaced bearings carried by said support and having aligning V-shaped notches therein for receiving and supporting the stem of the valve for rotary and axial movement, an arm, guide means between said arm and support and guiding said arm for movement into and out of engagement with the valve stem, resilient means reacting against a part fixed relative to the support and engaging said arm for urging said arm toward said stem and said stem into said notches, said stem being slidable relative to said arm, a grinding wheel rotatably supported with reference to said support, guide means carried by said support and guiding said 8, grinding wheel for'movement to cause the grinding surface of the wheel to pass the valve head contactV surface and grind the same, an adjustable non-yieldable end stop carried by the support and engageable with the free end of the valve stem to limit axial movement of the valve in a direction toward the free end of the valve stem, a shaft disposed substantially coaxially with reference to said valve stem, bearings therefor carried by said support, said shaft having a central longitudinal hole therein, a spindle disposed within said hole and slidable axially with respect to said shaft, a rubber cup carried by said spindle and having a cup-shaped surface for engaging the valve head, means acting between said shaft and spindle and restraining relative rotational movement therebetween and resilient means Within said hole and engaging said spindle for urging said cup against said valve head.

ARTHUR H. ANDERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,181,908 McDonald May 2, 1916 1,497,951 Smith May 31, 1919 1,572,165 Smith et al Feb. 9, 1926 1,702,267 Miller Feb. 19, 1929 1,916,775 Steber July 4, 1933 2,166,037 Campos July 11, 1939 2,425,898 Riegel Aug. 19, 1947

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