USRE14707E - arbuckle - Google Patents

Description

S. F. ARBUCKLE.

' SELF LUBRiCA TING PISTON. APPLICATION FILED MAIL. 19 1s.

Reissned Aug. 19, 1919. 14,707.

PIE. 2

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54/10 I? fleet/0x1 8. BY

ATTORNEYS SAMUEL F. ABBUCKLE, OF INDIANAPGTJIS, INDIANA.

SELF-LUBRICATING- P1553021 Original No. 1,294,023, dated February 11,

Specification of Rcissucd Letters Patent. ilgigsued Aug. 19, 1919s 1919, Serial No. 13,205, filed Fcbiuary flfi, 1918. Application for reissue filed March 24, 1919. Serial No. 284,838.

.T0 all whom it may concern:

Be it'known'that I, SAMUEL F. Account-n,

a'citizen of the United States, and it i dent of Indianapolis, county of Marion, ,nrl State of Indiana, have invented certain new and useful Self-Lubricating 1' ton; and I do hereby declare that the follow g is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts. The object of this invention is the automatic lubrication of the packing of the piston in a cylinder, adapted particularly for utilizing or pumping air or so that. the device will never -leak and have it all times its maximum. power and efficiency.

To the foregoing end, one feature of the invention consists in combining with a leatheror other acking for a piston, ofc lubricatin chamiier in the piston for con taining oi or other liquid lubricating material in contact with the coking so that it will be conveyed by ca i1 cry attraction to the surfaces of the pee ing which engages the cylinder, and thus maintain an air or gas tight joint, and also keep the metal or other packing in good condition so as to con-- tribute to itslong life. This inbricating chamber may. be made'by merely utilizing a hollow piston, as herein shown. There may also be an oil cup secured to the piston rod and communicating with said oil chamber in the piston by means of a. conduit piston rod.

Another eature of the invention consists in combining with the piston, a disk of leather or other packing material, the annular edge portion of which is bent over and around the piston for furnishing the surface to engage the cylinder and by making said surface relatively wide so as to obtain a wide bearing surface and thereby avoid the evil effects of Wearing action resulting from jarring or vibration of the device while in o oration.

The fol nature of the invention will he understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 a central longitudinal section of a cylinder and pis ton including my invention.

Fig. 2 is a central longtudinal section of a modified form.

The inner portion. of the piston rod is reduced. to leave a shoulder 15. On the re duccd portion a. cup-shaped iston 16 is placed, bein of somewhat smn ler diameter than the cyinder. Over the open. end of A piston rod this cnp-shaped piston member a leather asher or disk pecking 17 fits, its diameter being 'great enough for its peripheral poltion to be bent back over and around the j periphery of the piston and. tightly be": tween the piston and cylinder. A metal Washer 18 is then placed on the piston rod against the packing 17 and it is tightened down. by a nut 19. This'washer should he of about the same diameter as the piston so as to clamp and hold securely the packing between the piston and the washer.

It is een that this construction leaves a c1 their 520 so that the piston is a hollow piston and has in it a chamber for holding oil or lubricating material in a, relativel large quantity and in direct contact witthe body of the paokingj The oil will, of

course, by capillary attraction, permeate all ports of the packing and keep it moist and in good. condition. 1 This construction enables such a piston a very long "in-1e Without any uttention to its lubrication Ordinarily the n is placed, in t assomoi i and then left-'- ero'. unless all used, but if d red, a. further supply of lubricating material may be furnished by means of an oil cup secured on the piston rod and provided with a conduit 22leading from the oil cup longitudinally of the piston rod and opening into the chamber 20 in the piston. With s arrangement it'hecomes unnecest it mole the device in order to ntcrvals through the oil cup '21 and modified form shown inFig. 2, the shown turned over the Washer piston While it is piston with oil as it may he sup t the hollow piston. This is where principle, so far as lubrication is concerned,

however, is the same.

The modified form shown in 'Fig. 3 reverses the construction shown in Fig. 1 in order to enable the device to be worked in the same situation as inFig. 2. In other words, in Fig. 3 the hollow piston 16 is on the inner end of the .piston rod and the washer is next to the shoulder 15 in said rod.

The packing is clamped between them in exactly the same fashion as in Fig. 1, but reversed. i

It is seen from the foregoing that such a cylinder and piston may be made air or gas tight and may be lubricated automatically by filling the chamber in the piston with lubricating materialin immediate contact with the body of the packing.

The invention claimed is:

1. A piston having a closed chamber therein for holding liquid lubricating material, and cylinder packing projecting from said chan'iber and adapted to transmit lubricating material by capillary attraction to the outside portion of the packing. v

2. A piston having a piston rod, an imperforate cup shaped member on said rod with one side open, and a disk shaped packing member on said rod closing the opening in said piston member to form a closed chamber for holding liquid lubricatingmaterial and projecting beyond said chamber so that the lubricating material will reach the outside portion of the packing by capillary attraction.

3. A piston rod, an imperforate cup shaped piston member on said rod with one side open, a disk-shaped packing member on said rod and closing the opening in said piston member and forming a chamber for holding liquid lubricating material and extending outward beyond said chamber so as to transmit said material to the periphery thereof by capillary attraction, and a washer 0n the piston rod of substantially the same diameter as said chamber and on the side of the packing opposite said chamber.

4. A piston red one end thereof being reduced in diameter to form a shoulder, a cupshaped piston member on said reduced end with ene side open the opposite side engaging said shoulder, a diskshaped packing member on said rod and closing the opening plston.

5. A piston rod, a cup-shaped piston memher on said rod with one side open, a diskshaped packing member on said rod and closing the opening in said piston member and with its peripheral portion overlapping and surrounding said piston member, and a washer on the piston rod of substantially the same diameter as said hollow piston member for clamping the packing tightly against said piston member.

6. A piston rod, a cup-shaped piston memher on said rod with one side open, a diskshaped packing member on said rod and closlng the opening in said piston member and with its peripheral portion overlapping and surrounding said piston member, a washer of substantially the same diameter as the hollow piston member and on the opposite side of the packing, and a nut on the rod for clamping said packing between said washer and the hollow piston member.

7. A cylinder, a piston rod therefor with its inner end reduced and threaded and provided with a shoulder, a piston formed of a hollow member open on one side, a washer of substantially the same diameter as the piston and'a packing disk between the hollow member and the washer, all three of said last-mentioned elements being on the 're lured portion of the piston rod, and a nut on the inner end of the piston rod for clamping said piston thereon against the shoulder.

8. A cylinder, a piston rod, a hollow piston on said rod having a chamber for lubricating material, and a packing disk closing one side of the hollow member and hav ing its peripheral edge overlapping and surrounding said piston, said piston. rod being SAMUEL F. ARBUCKLE,

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