Патент USA US3033628код для вставки
May 8, 1962 P. J. LARSEN RAILWAY JOURNAL BOX LUBRICATOR Filed Oct. 17, 1960 3,033,618 United States Patent 0 ” vice 3,033,618 Patented May 8, 1962 1 2 3,033,618 In addition to serving as ‘an oil reservoir, the foam serves as a spring holding the upper end 11 of the wick RAILWAY JOURNAL BOX LUBRICATOR Peter J. Larsen, Erie, Pa., assignor to Lord Manufactur ing Company, Erie, Pa., a corporation of Pennsylvania Filed Oct. 17, 1960, Ser. No. 63,090 4 Claims. (Cl. 308—87) This invention is a ‘railway journal box luibn'cator in a preferred form of which the oil is con?ned in a body in contact with thejournal under all conditions,both in the presence ‘and absence of oil. .I ‘ Oil may be added .or the‘oil level checked through a spout-like extension or ?exible tube 20 cemented to the body. The lower end of the extension extends below the oil level 18 and the upper end is closed by a suitable plug 21. The oil level may be inspected by removing of open pore polyurethane sponge which serves both as 10 the plug ‘and oil added if required. The oil ?ows direct ly into the cavity 9 and‘ is not impeded by the wick or an oil reservoir and as a spring for maintaining pressure by the foam. As is apparent from FIG. 2, the wick contact between a wick and the journal. Polyurethane closes the upper end of the cavity 9 but the. chambers 19 sponge is different 'froinf'natural sponge ‘and other pres at the lower end of the cavity are open ‘and unobstructed. ently known synthetic sponges in that it does not absorb or soak up oil and its modulus of elasticity is unaffected 15 This unobstructed volume ‘of the cavity holds enough oil so that whenever removal of the inspection plug 21 indi by the presence or absence of oil. Natural sponge soaks up oil and becomes limp. Neoprene sponge swells. ' cates that the oil level is low enough to require adding oil,’ this may be done quickly without waiting‘ for the oil to Cellulose and vinyl sponge dry out and harden. The be soaked up by the wick or sponge. sponge is coated with an oil resistant skin which forms an The manufacture is very simple. The foam body 7, oil retaining envelope. 20 together with any desired cored out openings such as the In the drawing, FIG. 1 is a longitudinal section through cavity 9 and chambers 19 with the ?ller tube 20, is easily ‘a journal box and FIG. 2 is a transverse section through made in a suitable mold and after molding, may be the journal box. painted with the oil impervious skin 8. In the drawing, the common parts are readily identi It will be noted that the upper surface of the pad is ?ed, 1 being the journal box, 2 the journal, 3 the journal 25 dished around the upper end of the wick so that any ex bearing, 4 the wedge and 5 the access cover held closed cess lubricant fed to the journal will be scraped off by the by a‘ leaf spring 6. These parts are or may be of com wick and will drain back into the foam either through mon construction. the upper end of the wick cavity 9‘ or through other suit Between the lower side of the journal and the journal box is a body 7 of open pore polyurethane sponge having 30 able drain openings in the skin. The dished oil collect ing upper surface may ‘be preformed into the molded painted on its outer surface ‘an oil impervious skin or body, or the dished surface may be formed by the pres coating 8, of any suitable material such as acrylo, acrylo— nitrile, polysul?de, silicone, or ?uoro elastomers. The ~ sure exerted on the upper end of the wick as the foam body is compressed between the bottom of the journal skin forms an oil retaining envelope vand encloses the 7 entire outer surface of the body except for a wick cavity 35 box and the under surface of the journal. ‘If the oil impervious skin 8‘ is omitted, the body 7 pre 9 in the upper surface of the body below the journal vents splashing of the oil out of the journal box. which receives the lower end of a felt wick 10 having an The oil impervious skin provides a clean and easily integral pad 11, the upper end of which bears against handled construction. Dirt is kept out of the oil. Oil is the under side of the journal. The wick 10 is convenient kept within the skin. The sponge reinforces the skin so ly made of two sheets 12. of felt stitched together by seam that the danger of rupture or puncture is slight, even 13. The length and thickness of the felt is such that when the skin is thin. The skin would be advantageous the lower end 14 ?ts snugly in the cavity 9 so that oil with other oil resistant sponges where it might be neces cannot flow out of the cavity even when the car is inverted sary to use supplementary spring reinforcement and oil for dumping the contents. At opposite ends of the seam 13, the felt has shoulders 15 projecting beyond the ends 45 feeding wicks. What is claimed as new is: of the cavity 9 so that under load the upper surface of 1. In a railway car journal box, a device for supplying the body 7 is dished inward as indicated at 16 in FIG. 1. oil to the journal and journal bearing comprising a body There is a similar dishing of the upper surface of the of open cell polyurethane foam between the journal box body 7 as indicated at 17 in FIG. 2. Oil on the upper surface of the body drains toward the center and ?ows 50 and the under side of the journal, said body being exteri orly coated with an oil impervious skin or envelope back into the sponge. The skin 8 may be cut away at whereby the body serves as a reservoir for holding oil at 17:: around the cavity to facilitate drainage. the desired level in which the cells of the foam impede The sponge does not absorb oil. The cells of the ?ow of oil so that oil is not lost during inversion of the sponge ‘act as miniature oil reservoirs from which the oil is free to run out but at a restricted rate. The oil accord 55 car for dumping, and a wick on the upper surface of the body having its upper end contacting the under side of ingly tends to assume its natural level both in the foam the journal and having portions extending into said body and in the wick cavity as indicated at18, thereby main below said oil level within the envelope, said body being taining a level of oil around the lower end 14 of the wick. of greater thickness than the space between the upper end The wick cavity 9 and chambers 19 on either side of the cavity 9 provide a place where oil can collect in rea 60 of the wick and the journal box whereby the body is com pressed and exerts a force resiliently holding the upper sonable quantity and be absorbed by the wick as needed. end of the wick in contact with the journal. The body 7 does not act like natural sponge because 2. The construction of claim 1 in which the body'has it does not soak up or absonb oil. From one aspect, the envelope or skin 8 acts as \an'oil container and the foam in ‘addition a spout-like extension or ?ller tube between merely divides the oil into a great many small pools with thebox and the outer end of the journal, and the upper 65 restrictions between each pool preventing rapid ?ow. This is an important advantage in railway cars which must . be inverted for dumping. When inverted, the foam so end of said extension extending above the oil level, the lower end of the extension depending below said oil level, and means closing the upper end of said extension. 1, restricts the flow of oil that there is no oil loss during 3. In a railway car journal box, a device for supplying the time required for dumping. Of course, if the rail 70 oil to the journal and journal bearing comprising a body way car remained in an inverted position, in time the of open cell oil resistant sponge between the journal box lubricant would ‘all drain out. and the under side of the journal, said body being ex aosaa 3 whereby the body serves as a reservoir for holding oil at and a restricted upper part leading to an opening in the upper surface of the body, a wick ?tting in said open the desired level in which the cells of the foam impede ing and depending into but occupying only a part of the ?ow of oil so that oil is not lost during inversion of the car for dumping, ‘and a wick on the upper surface of the volume of the lower part of the cavity whereby a sub stantial part of the volume of the cavity is open and un obstructed, a ?ller tube sealed to and extending through the envelope, said tube having its upper end accessible for ?lling and its lower end leading to the unobstructed volume of the cavity, the unobstructed volume of the teriorly coated with an oil impervious skin or envelope body having its upper end contacting the under-side of the journal and having portions extending into said body below said oil level within the envelope, said body being of greater thickness than the space ‘between the upper end of the wick and the journal’box whereby the body is 10 cavity being sufficient to permit adding oil to the desired level without waiting for oil to be soaked up by the wick compressed between the Wick and the journal. or sponge.v > 4. In a railway car journal box, a device for supply ing oil’ to the journal and journal bearing comprising a References Cited in the ?le of this patent V body ‘of open cell polyurethane foam between the journal UNITED STATES PATENT. box and the under side of the journal, said body being 15 exteriorly coated; with an oil impervious skin or envelope Keeler et a1. _______ __'___’ Dec. 6, 1938 2,l38,971 whereby the body serves as a reservoir for holding oil at the desired level in which the cells of the foam impede ?ow of oil so that oil is not lost during inversion of the car ‘for dumping, said body having a cavity within the 20 envelope with an enlarged lower part below the oil level 2,571,235 Hamer ______________ __ Oct. 16, 1951 OTHER REFERENCES “Foamed Polyurethanes,” published in British Plastics, January 1956, pages 5 through 9 and 39 relied upon.