US1675451A - Lubricant compressor - Google Patents

Description

.ll 192 1,675,451l ab 3 8' E. w. DAvls LUBRICANT COMPRESSOR Filed April 30, 1924 Patented July 3, 19,28.

UNITED STATES,

PATENT OFFICE.

ERNEST W. DAVIS, 0F OAK PARK, ILLINOIS, ASSIGN OR T0 THE BASSICK MANUFACTUR- ING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F DELAWARE.

LUBRICANI COMPRESSOR.

Application filed April 30,

My invention relates to improvements in lubricant compressors, and is particularly concerned with the provision of a novel type of lubricant compressorY Vdesigned particularly for supplying lubricant under high pressure to bearings to be lubricated. My improved compressor is intended to be used with a plurality of fittings, one of which is secured to each of the bearings to be lubricated, and comprises means for successively making sealed connection with the several fittings.

The objects of my present invention are;

First, to provide a compressor of the character described, by means of which lubricant under comparativel high pressure can be easily and quickly orced into thebearngs.

Second, to provide a compressor, such as described, comprising a barrel, or low pressurecylinder, and a high pressure cylinder communicatin therewith, in combination with means or discharging the lubricant under high pressure from the high pressure cylinder.

Third, to provide a compressor of the character described, in which the means for displacing or discharging the lubricant from the high pressure cylinder is connected' with a hollow member, adapted to conduct the lubricant from the high pressure cylinder to the fittings.

Fourth, to provide a compressor, embodying the features mentioned above, 1n which the movement of the discharging element is eii'ected by relative rotation between the high and low pressure cylinders.

Fifth, the rovision of a fcompressor of the constructlon described, in which the means for conducting the lubricant from the high pressure cylinder comprises a coupling member, adapted to be secured to a fitting by a movement substantially parallel with the axis of the high pressure cylinder; and

Sixth, to provide a compressor of the character described, which is simple in construction, economical to manufacture and easy to operate. f

Other objects of my invention will appear as this description progresses, reference b eing had to the accompanying drawings, 1n which Figure 1 is a side elevation, partially 1n longltudinal section, illustrating certain features of my improved compressor;

1924. Serial No. 710,043.

Figure 2 is a bottom view, on an enlarged scale, of the coupling member which I have illustrated in the present embodiment of my invention;

Figure 3 is an enlarged, sectional detail, showing certain portions of my improved coripressor in central, longitudinal section; an

Figure 4 is a view similar to Figure 3, but showing a modified form of my invention.

Referring, for the time being, to Figures 1 to 3, inclusive, my improved compressor illustrated therein comprises a barrel, or low pressure cylinder, 5 which is provided with the removable cap or closure 6, preferably connected therewith by a screwthreaded connection 7. A rod 8 is secured to the cap 6 and projects inwardly substantially the entire length of the barrel 5. This rod` is reduced in diameter adjacent its inner end, as shown at 9, and terminates in a head 10, the purpose of which will later be referred to. A piston P is reciprocably mounted in the barrel 5 and comprises the sleeve 11, which is slidably mounted upon the rod 8, the face plate 12, the follower plate 13, and the cup leather 14. The last three elements are provided with central apertures fitting over the reduced portion 11 of the sleeve 11, and secured thereto by swedging over the end of this reduced` portion, as shown at 11. I prefer to provide the cap 6 with an air vent 15, to permit the ready access of air to the space between the piston P and the closure 6.

i The opposite end of the barrel 5 is reduced in diameter, as shown at 16, and terminates in a sleeve 17, which forms a high pressure cylinder, and which is secured to the end 16 of the barrel 5 by means of the screwthreaded connection 18, or any other suitable manner.

A metal washer 19 and a gasket 20, of fibre, felt, orother suitable material, are clamped between the end of the reduced portion 16 of the barrel and the shoulder 21, formed on the sleeve 17. A valve 22 is adapted to seat against the washer 19, and is provided with the valve stem 22, which terminates in the head 23. A spiral compression spring 24, confined between the valve 22 and head 23, yieldingly holds the valve 22 Iin its closed osition.

A hollow lunger ro 25 extends through the outer en of the sleeve 17 and is provided with the external threads 26, which are here shown as double threads. These threads coact with corresponding internal threads 27, formed in the outer end of the sleeve or cylinder 17. The inner end of the plunger rod terminates in the plunger 28, which is recessed, as shown at 29, to receive the valve 22, and is provided with an oppositely disposed recess 30, which forms a seat for the valve 31. This valve is yieldingly held against the seat 32 by means of the compression spring 33, which is confined between the valve 31 and the adjacent end of the hollow plunger rod 25.

To prevent leakage in either direction past the plunger 28, I make use of the oppositely disposed cup leathers 34 and 35, which are mounted upon the plunger rod 25 and separated by the metal disk 36.

The outer end of the plunger rod 25 terminates in a cylindrical body member 37, the bore of which is internally threaded, as shown at 38. by the threadedplug 39 and the opposite end thereof is closed by the cup leather 40, having the central perforation 41. The fiange 40 of this cup leather is confined between an externally threaded collar 42 and the internally threaded wall of the body member 37. A compression spring 43, confined between the cap 39 and the bottom of the cup leather 40, tends to convex the leather outwardly.

A pair of oppositely disposed flanges 44, formed integrally with the body member 37, and spaced from the end 45 thereof, provide means for making connection with a fitting, such as shown at 46 in Figure 1. This fitting comprises the head 47, which is adapted to be received between the fianges 44 and the end 45 of the body member, and the neck portion 48', which passes in between the oppositely `disposed edges of the two flanges 44. The inner ends of these flanges are provided with projections 48, which act as stop members to limit the movement of the coupling member relatively to the fitting. The outer ends of the fianges 44 areflared, or curved, as shown at 49, to facilitate the connection of the coupling member, just described, with the fitting.

In the use of my improved compressor, described above, the closure 6, the rod 8 and the piston "`P are first removed from the barrel 5. In performing this o eration, the cap 6 is unscrewed and pulle outwardly, thereby bringing the reduced end portion 9 of the rod 8 into the sleeve 11, so as to permit air to fiow into the space at the rear of the piston P and prevent the formation of a vacuum in the barrel as the piston P is withdrawn. It will, of course, be understood that the head 10 engages the end of the sleeve 11 and causes the piston to be removed from the barrel 5, along with the One end of this bore is closed i rod 8. After the barrel has been substantially filled with lubricant, the cover 6 and its attached parts are replaced. The operator then engages the coupling member of the compressor with the fitti by a movement of the coupling member 1n a direction substantially parallel with the axis of the compressor. In 'this manner, the coupling member and the fitting are brought into the relative positions illustrated in Figure 3.

The operator thereupon oscillates the barrel 5 about its axis, rotating it first in one direction and then in the other direction. It will be apparent that since the plunger rod 25 is connected with the fitting 46, through the coupling member, the plunger rod 25 will be held stationary and that when the compressor is turned in one direction rela- 'tively to the lunger rod, thevsleeve or cylinder 17 wil move toward the coupling member or fitting, thereby causing the lubricant to be displaced from the high pressure cylinder through the valve seat 32, the hollowplunger rod 25, and the coupling member into the fitting, and that when the compressor barrel -5 is rotated in the opposite direction, the sleeve 17 will move away from the coupling member, thereby permitting the valve 31' to close undel` the tension of the spring 33, and tending to create a vacuum in the high pressure cylinder between the plunger head 28 and the valve 22. Atmospherlc pressure exerted upon the outer face of the piston P will cause thelatter to move toward the high pressure cylinder vof the compressor and force lubricant past the valve 22 into the `cylinder 17, and thereby priming the latter so that when the barrel is again rotated in the opposite direction, lubricant will be discharged from the high pressure cylinder, through the plunger rod 25 and the coupling member into the fitting. It will, of course, be understood, that the i spring 24 is a very light spring which will not offer very much resistance to the openinof the valve 22.

first rotating the barrel 5 in one direction and then in the opposite direction, the operator can feed successive charges of lubricant into the fitting, until sufficient lubricant has been supplied' thereto, and by then pulling upon the barrel in the direction away from the fitting. can detach the coupling member from the fitting. By repeating the operation just described, for each of the fittings of a mechanism, the operator can easily and quickly supply all the bearings with lubricant under pressure.

The modified form of my invention, illustra-ted in Figure 4, is similar'to that described above, except that the cylinder 17 has a pair of oppositely' dis sed cam slots 50, formed in lts outer en for receiving the pins or projections 51, extending outwardly from the plunger rod 25', which is lio i whic hollow the same as the plunger rod 25, and connected with a coupling member 37 of the same construction.

The plunger at the inner end of the plun r rod 25 comprises the washer 53, is preferably formed of leather, or other suitable material, the edge of which is confined by the metal band 54 which revents it from becoming distorted. The ttom of the cup leather 55 contacts with the washer 53, and the sides of this cup leather surround the outer end of the tubular displacing member 56, the inner end of which 1s flanged over, as shown at 57, to form a valve seat for the valve 58, and the other end of which is flanged over, as shown at 59. A compression spring 60, confined between the flange 59 and the closure 58, provides means for yieldingly holding the latter on its seat. A beveled ring 61 surrounds the tubular displacing element 56 and engages the edge of the cup leather 55. A compression spring 62, confined between the valve seat 19 and the beveled ring 61, provides means for yieldingly ur ing the plunger construction, ]ust describe in anr outward d1- rection.

A cap 63, threaded onto the outer end of the sleeve 17', and comprising the inturned flange 64, provides means for reventing the ins-or projections 51 from being completely is laced from the cam slots 50.

he construction just described operates 1n substantially the same manner as that illustrated in Figures 1 to 3, inclusive. When the compressor barrel 5 is oscillated, the cam slots 50 ride back and forth uponthe pins 51, thereby causing the plunger in the high pressure cylinder 17 first to move inwardly, under the force of the plunger rod 25', and then to move outwardly, under the tension of the sprinA 62. Each time the plunger moves inwar ly, lubricant is displaced from the high pressure cylinder, past the valve 58, through the plunger rod 25 and coupling member 37, into the fitting, and each time the plunger moves outwardly,y under the tension of the spring 62, lubricant is forced past the valve 22 by atmospheric pressure exerted upon the piston P, just as in the, construction previously described.

While I have described the details of construction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable of other adaptations and modificationswithin the scope of the appended claims.

Having thus described my invention, what I claim is:

1. A lubricant compressor, comprising a barrel. a sleeve communicatin with said barrel and formin a c linder, t e outer end of said sleeve being internally threaded, an outwardly opening valve controlling communication between said barrel and said sleeve, a hollow plunger rod extending through the outer end of said sleeve and externally threaded for co-acting with said threaded sleeve, a plunger at the in ner end of said plunger rod, comprising an outwardly opening valve, and a coupling member carried by the outer end of said plunger rod for making sealed connection with a titting by a movement substantially parallel with said lunger rod.

2. A lubricant compressor comprising a barrel, a sleeve communicating with said barrel and forming a cylinder, the outer end of said sleeve being internally threaded, an outwardl opening valve controlling communication etween said .barrel and said sleeve, a hollow lungcr rod extending through the outer end) of said sleeve and externally threaded for co-acting with said threaded sleeve, a plunger at the inner end of said plun er rod, and a coupling member carried by t e outer end of said plunger rod for making sealed connection with a fitting by a movement substantially parallel with said plunger rod.

3. A lubricant compressor, comprising a barrel, a sleeve communicatin with said barrel and forming a cylinder, t e outer end of said sleeve being internally threaded, a valve controlling communication between said barrel and said sleeve, a hollow plunger rod extending through the outer endof said sleeve and externally threaded for co-acting with said threaded sleeve, a plunger at the inner end of said plunger rod, and a coupling member carried b the outer end of said plunger rod for ma ing sealed connection with a fitting.

4. A lubricant compressor, comprising a barrel terminating in a sleeve, a valve controlling communication between said barrel and said sleeve, a plunger reciprocably mounted in said sleeve, a hollow plunger rod connected with said plunger and provided at its outer end with means for makin connection with a fitting, said plunger ro having a cam connection with said sleeve and means actuated by the rotation of Said sleeve relatively to said plunger rod for forcing lubricant from said barrel into said sleeve.

5. A lubricant compressor, comprising a barrel terminating in a sleeve, a plunger reciprocabl mounted in said sleeve, a hollow plunger ro` connected with said plunger and provlded at its outer end with means for making connection with a fitting, said plunger rod having a cam connection with said sleeve, and means actuated by the rotation of said sleeve relatively to said plunger rod for forcing lubricant from said barrel into said sleeve.

6. rA lubricant compressor, comprisin a barrel terminating in a sleeve, a. hol w plunger rod threaded through the outer end of said sleeve and provided at its inner end with means for displacing lubricant from said sleeve, the outer end of said plunger rod being provided with means for making connection with a fitting.

7. A lubricant compressor, comprising a. barrel terminating in a sleeve, means for displacing lubricant from` said sleeve, said m'eans and said sleeve having inter-engaging cam surfaces, and means connected with said last named means for making connection with a fitting.

,8. A lubricant compressor comprising a barrel terminating in a sleeve, a plunger element carried by said sleeve and having a longitudinal bore therethrough, the outer end of said element having means for making connection with a tting and for pre- Venting relative rotation between said fitting and element around the lunger axis, a check valve in the bore of sai element, co-operating means on said sleeve and said plun er for causing relative reciprocation there etween upon relative rotation thereof.

In witness whereof, I hereunto subscribe my name this 25th day of April, 1924.

ERNEST W. DAVIS.

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