US1923436A - Foldable grease gun - Google Patents

Description

Aug. 22, 1933.

S. W. HARTLEY FOLDABLE GREASE GUN Filed June 14, 1929 2 Sheets-Sheet l INVENTOK .4 Mme/v5 y on b 1933- s. w. HARTLEY FOLDABLE GREASE GUN Filed June 14, 1929 2 Sheets-Sheet 2 INVENTOR A TORNEY [w E m Q mm m mm Nm\ 6 mm m+ Patented Aug. 22, 1933 FOLDABLE GREASE GUN Seward W. Hartley, New York, N. Y., assignor, by

mesne assignments, to The Lubrication Corporation, South Bend, Ind., a Corporation Delaware Application June 14, 1929. Serial No. 370,770

19 Claims.

This invention has reference to the art of lubrication and particularly relates to a foldable grease gun or compressor of the high-pressure, booster type, such as described in the application of Clark W. Parker, filed March 2, 1929,

SerialNumber 343,952; and to certain details of construction which enable the gun to be readily loaded, overcome a number of operational difficulties, andenable the gun to be dismantled and reassembled with facility. Particular objects and advantages of my invention will be noted during the course of this description; and my inventive features, combinations and elements will be set forth in the claims.

In order that my invention may be clearly understood, I have provided drawings wherein:

Figure 1 is a longitudinal, central, sectional view showing details of my grease gun or compressor, the handle or manipulating means being shown folded against the spout and the piston and its associated parts being in the position they would assume with the barrel full of lubricant, and before releasing the piston to apply pressure;

Figure 2 is a cross-sectional view on the line 2-2 of Figure 1;

Figure 3 is a cross-sectional view on the'line 33 of Figure 1;

Figure 4 is a view similar to Figure 1 with parts in elevation and parts broken away because of limitations of the sheet, the piston and its associated parts being in the position they assume when the lubricant is partially exhausted;

and Y V Figure 5 is a cross-sectional view on 55 of Figure 4.

Referring to the drawings, the numeral 1 designates the gun barrel or grease shell, 2 the delivery spout or tube, 3 the plunger or boosterrod, and 4 the actuating handle or lever which is connected to the booster-rod as hereinafter described, and which may be folded into close relation with the gun as shown, Figures 1, 2 and 3.

The delivery spout 2 forms parts of what might be termed the main frame or casting 5, which has an annular part 6 provided with a flange 7. The part 6 and its flange 7 form a seat 8 for the delivery end of the barrel. When it is desired to refill the barrel, it will be removed from this seat, as hereinafter described. A gasket 9 is interposed between the end of the barrel and the seat 8, so as to insure against the escape or leakage of the lubricant. The inner end of the main frame is provided with another annular the line member 10 in the form of a ring through which the inner end of the barrel passes. This ring has a flange 11 which is internally threaded at 12, so as to cooperate with a nut 13 which is in the form of a ring, and has a shoulder 14 which engages a closure member 15 having a skirt 16 which fits into and is welded or otherwise secured to the end of the barrel. Web 17, forming part of the frame member 5, Figures 4 and 5, connects the annular parts 6 and 10, and extends part way about the barrel. This web acts as a protection for the barrel, and is a strengthening means or reinforcement for the main casting or frame, so that the frame may be made of light metal and yet have great rigidity.

The spout 2 has a bore 18 in which the booster 3 snugly fits. The outer end of the bore has a counterbored, threaded enlargement 19, to cooperate with a coupling member,--not shown. The passage 20, which connects the bore 18 with the chamber of the barrel is provided with a checkvalve, comprising the usual form of ball 21 normally pressed against a seat 22 in a threaded bushing 23, by a spring 24. The check-valve acts .to prevent back pressure in the barrel 1, and leakage of the lubricant, if a thin lubricant were being used.

Novel means are provided for maintaining a constant pressure on the lubricant within the 35 barrel. The piston which forces the lubricant from the barrel comprises a cup washer 25, which is secured on a threaded, turned-down portion 26, of a rod 27, by means of a nut 28. The cup washer 25 is locked on one side by a disk 29 and on the other by a skirted piston guide member 30. A strong spring 31 is interposed between the piston guide member 30 and a disk 32, which bears against a flattened part 33 of the closure member 15. Thus the spring 31 will normally 9 tend to force the piston against the body of the lubricant within the barrel 1, and cause it to be constantly and automatically fed into the delivery spout through the valve 21. The rod 27 has an enlarged head 34 which fits into a socket 35 in the closure member 15. The head 34 has an annular. groove or turned down portion 36 which is engaged by the head 3'7 of a stud 38 when it is desired to lock the piston in its withdrawn position. The head 37 is forced into engagement with the groove 36 by a spring 39, and may be withdrawn from the groove by a nurled handle 40. The end of the head34, beyond the groove 36,- is tapered at 41 so that it will cam the head '37 of the stud 38 out of the no way when the head 34 is being extended or entered into the socket 35.

The disk or spring seat 32 is provided with an annular, central opening and a sleeve 42 forming one member of a telescoping connection for the piston, passes through this opening and has a flange43 overlapping and. contacting with the disk 32 on the side opposite the spring; The opposite end of the sleeve 42 is provided with an inturned flange 44, which may engage an outturned flange 45 on an intermediate, telescoping sleeve 46 when the latter is in its extended position. The sleeve 46 has an inturned'flange 47 on its opposite end for engagement with an outturned flange 48 on an inner telescoping member 49, which surrounds the stud 27 and has an inturned flange 50 which engages the enlarged head 34 of the stud 27 when the latter is shifted by the spring 31, as shown in Figure 4. I desire to lay stress on this telescopic plunger rod as an important feature of my invention. I

The closure 15 has a bifurcated extension 51 to which the handle 4 is pivoted by pin 52, which is slidably mounted in a boss 53 formed integral with one of the ears of the extension 51. The pivot pin is normally held in its operative position'by a spring 54,-Figure -2,,and by a nurled head 55 secured'on its outer end, may be withdrawn so as to disconnect the handle when it is, desired to remove the barrel 1. The outer end of the booster rod 3 has secured to it a head 56 having a slot 57. A pin 58 passes through this slot, and suitable openings in the handle 4.- It will thus be apparent when the handle 4 is pulled away from the gun, the pin and slot connection will withdraw the booster rod. The

- to which a suitable tool may be applied when removing or replacing the same.

When it is desired to remove the barrel for filling purposes, the nut 13 is removed from the ring 11. The nurled knob 55 is grasped and pulled outwardly, thus disconnecting the handle 4 from the bifurcated extension51. The handle 4 and booster rod are then pulled out slightlyand about 90 on the booster rod as an axis. The nut 13 may then be removed and the barrel, with its closure 15 and piston and associated parts, is withdrawn from its seat 8 and slipped through the ring 10. The barrel is then plunged into the container of lubricant, and the latter entering the barrel will force the piston back and collapse the telescopic connection and compress the spring 31 until the parts assume the position shown in Figure 1, with the head 3'7 of the pin 38 engaging the groove 36 of the stud 27. If desired, the piston may be forced backwardly and locked in its retracted position before filling the barrel with lubricant, and

- the barrel then filled in any desired manner.

The refilled barrel is then slipped back through the ring 10 to its'seat 8. The nut 13 is secured in place and the handle 4 again connected to the extension 51 by pin 52. After releasing the head 37 from the groove in stud 27, the gun is again ready for operation. Herein I desire to lay stress upon the means connecting the booster handle with the barrel, so that the: latter may be quickly and easily removed for filling the same; upon the large barrel for holding the grease and the comparatively small delivery spout and booster, enabling very high pressure to be attained; upon the particular manipulating means which may be folded against the spout and frictionally held in that position without detaching said manipulating means from'the booster; u-pon the means of the automatic locking means for the telescopic piston rod which also holds the spring compressed; and upon other details of improvement set out in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A lubricant gun comprising a supporting frame, a removable lubricant holding barrel, a delivery spout having a passage therethrough and to the barrel, a booster working in said passage, an operating lever for the booster mounted on the barrel, and means whereby the connection between the lever and the barrel can be broken when the barrel is to be removed for filling.

2. A lubricant gun comprising a cylindrical barrel open'at both ends, a frame having a re cess with an outlet in which one end of the barrel is received, a ring carried by the frame through which the other end of the barrel is extended, a closure mounted on the latter end of the barrel, and means between the closure and the ring for holding the barrel on the frame.

3. A lubricant gun having a frame composed of a U shaped web having a barrel supporting member at one end and a ring at the other end through which the barrel may pass, said frame being extended as a delivery spout the bore in which extends parallel withthe said web, and a (valved passage extending through the frame at an angle to the spout and communicating with the bore of the latter.

4. In combination with the supporting frame of a lubricant gun, a barrel mounted in the frame atone end, and means for locking the barrel in the frame comprising a circular member at the other end of the frame, a fixed head carried by the barrel, at the latter end of the frame, and a locking'nut removably engaging the said frame member and the said fixed head.

5. A lubricating gun comprising a large cylindrical open end barrel, a frame having a seat for the barrel at one end and a ring at the other end in which the barrel is held, means including a closure for locking the barrel and frame removably together, a comparatively small delivery spout carried by the frame having a passage therethrough and connecting with said seat, and a booster mounted in the frame and working in said passage including means mounted on the barrel for actuating the booster.

6. A lubricant gun having a supporting frame provided with a recess at one end merging into a valved outlet, a lubricant carrying barrel, forming the body of the gun and open at one end, removably mounted in the recess of the frame, and means at the other end of the barrel locking the barrel in the frame.

7-. A' lubricant gun comprising a supporting frame having a circular flange at one end and a passage therefrom, a barrel open at one end for tightly engaging said flange, a removable closure for the opposite end of the barrel, and means between the frame, the barrel and the closure for holding the barrel in place.

8. A lubricating gun comprising, a supporting frame, a lubricant supply barrel open at its forward end, a piston in said barrel, piston operating means for urging said piston forwardly in said barrel, said frame having a recess therein for receiving the open forward end of said barrel and being further provided with a lubricant passage through which lubricant from the barrel may be conducted away from said recess, and means associated with the rearward end of said barrel and with said frame for applying a forward thrust to said barrel to cause a lubricant tight seal between the open end of the barrel and the recessed portion of said frame.

9. A lubricating gun comprising, a supporting frame, a lubricant pump mounted on said frame, a lubricant supply barrel open at its forward end, said frame having a recess therein for receiving the open forward end of said barrel and being furuther provided with a lubricant passage through which lubricant from the barrel may be conducted away from said recess to said pump, and means associated with the rearward end of said barrel and with said frame for applying a forward thrust to said barrel to cause a lubricant tight seal between the open end of the barrel and the recessed portion of said frame.

10. A lubricating gun comprising, a supporting frame, a lubricant pump having a piston mounted on said frame, a lubricant supply barrel open at its forward end, said frame having a recess therein for receiving the open forward end of said barrel and being further provided with a lubricant passage through which lubricant from the barrel may be conducted away from said recess to said pump, and means associated with the rearward end of said barrel and with said frame for applying a forward thrust to said barrel to cause a lubricant tight seal between the open end of the barrel and the recessed portion of said frame, said pump being disposed with its axis parallel to the axis of said barrel.

11. In combination with the barrel of a lubricant gun, a closure 'for one end of the barrel, a piston having a sectional contractible telescopic rod mounted in the barrel, a spring between the piston and closure, and means for locking the rod and closure together when the rod sections are contracted, whereby the closure, rod, piston and spring can be removed from the barrel as a unit.

12. A lubricant gun having a lubricant holding barrel, in combination with a pressure-creat ing piston operating in said barrel, said piston being connected to a rod composed of a plurality of short tubulartelescopic sections, a supporting rod on which said sections are mounted, and means for securing said supporting rod centrally in one endof the barrel.

13. A lubricant gun having a lubricant holding barrel, in combination with a pressure creating piston operating in said barrel, said piston ,being connected to a rod composed of a plurality of short tubular telescopic sections, a slrort supporting rod for the tubular sections, means for releasably'securing said supporting rod in the barrel, and expansible means surrounding the tubular sections for shifting the piston in the barrel, whereby the piston, its rod and shifting means may be assembled in one end of the barrel.

14. In a lubricating gun, a cylinder, a piston mounted in said cylinder, a compression spring for urging said piston along the axis of the cylinder, and a plurality of telescopically arranged members disposed substantially concentric with the axis of said spring, the outermost of said members being under the influence of said spring tending to extend the telescopic arrangement of the members, said cylinder having an opening through one end thereof through which one of said telescopic members may extend.

15. A lubricating gun comprising, a body assembly, a lubricant pump carried by said body assembly, a barrel providing a source of lubricant supply, said body assembly providing a space for receiving the barrel, the walls of said assembly, defining said space, surrounding at least the inner and outer ends of the barrel, said barrel having an opening at its inner end, said body assembly having a lubricant conducting passageway communicating at one end with said pump, means at the opposite end of said passageway so fashioned as to'conform to and to contact with the walls of said barrel adjacent to said barrel opening to form a sealing contact therewith, and means associated with the body assembly and with the barrel for drawing said barrel against said sealing means in a direction parallel to the axis of the barrel for maintaining lubricant-tight relationship between said barrel and said lubricant conducting passageway, the last said means being effective at places spaced from said sealing means.

16. A lubricating gun comprising, a body assembly, a lubricant pump carriedby said body assembly, a barrel providing a source of lubricant supply, said body assembly providing a space for receiving the barrel, the walls of said assembly, defining said space, surrounding at least the inner and outer ends of the barrel, said barrel having an opening at its inner end, said body assembly having a lubricant conducting passageway communicating at one end with said pump, means at the opposite end of said passageway so fashioned as to conform to and to contact with the walls of said barrel adjacent'to said barrel openingto form a sealing contact therewith, means associated with the body assembly and with the barrel for drawing adapted to bear upon the lubricant content thereof, a plurality of members telescopically arrangedin series'at the rearward side of the piston, a compression spring urging said piston inwardly of the barrel and limited in its extendability by said telescopically arranged members, and means for holding said members and said spring in operative position relative to the barrel.

' 18. A lubricant gun having a lubricant holding causing said rod yieldingly to extend, a supporting member to which said telescopic rod is secured, and means for securing said supporting.

7 member centrally of one end of said barrel.

19. In a lubricant feeding device, a cylindrical lubricant reservoir, a piston in said reservoir adapted to bear upon the lubricant content thereof, a compression spring for urging said piston inwardly of said reservoir and a plurality of telescopically arranged members cooperating with said piston and said spring for limiting the extendability of said spring and for maintaining the piston and spring in unitary assembly.

SEWARD W. HARTLEY.

ion

Images