Patent GB-430827-A (GB)
Title: Improvements in couplings for lubricating apparatus, and apparatus for use therewith
IPC: F16N21/04
Filed: 1933-12-27
Abstract: 430,827. Lubricator couplings. ALEMITE CORPORATION, 2650, North Crawford Avenue, Chicago, U.S.A. Dec. 27, 1933, No. 36330. Convention date, March 20. [Class 99 (i)] A lubricator coupling 254, Fig. 1, is adapted to be secured to a nipple on a part to be lubricated by a plurality of clamping jaws 282 which are confined between the nozzle 270 and the body 256 of the coupling and are actuated by the pressure of the lubricant passing through the coupling. The nozzle 270, which is provided with a piston-like leather packing 276, is freely slidable within the coupling body 256, and as shown it is formed with an axial bore 288 for the lubricant and a spherical nipple-contacting surface 290 at its outlet end. In operation, when the coupling is applied to the nipple the latter pushes the nozzle upwardly and presses the jaws 282 outwardly. Lubricant under pressure is then supplied to the coupling, whereupon the coupling body is pushed away from the nipple causing a conical cam surface 294 on said body to engage cam surfaces 292 at the lower ends of the jaws and force the jaws into engagement with the underside of the head of the nipple ; simultaneously the lubricant forces the nozzle into contact with the nipple. The coupling is completed by a spring-pressed check valve 266 which is normally in engagement with the bore of a plug 262 located within the coupling, the threads of the plug being such as to form a restricted passageway 265 to permit release of lubricant pressure in the coupling prior to uncoupling, and also a spring 284 located on the nozzle and adapted normally to push the jaws outwardly. In a modification, Fig. 5, the jaws 122 are pivoted on a ring 130 which is slidably mounted on the nozzle 134, and their cammed ends 160 are first forced into engagement with a camming surface 124 on the coupling body 112 by the lubricant pressure acting on a piston 150, which is also slidably mounted on the nozzle, and are then forced inwardly by upward movement of the coupling body effected by the lubricant pressure. As shown a compression spring 144 is interposed between the ring 130 and a shoulder 142 on the nozzle. The coupling is stated to be for use with high pressure lubricating apparatus, the latter being provided with manually-operated needle valves, restricted byepasses, &c., for relieving the pressure in the coupling after the lubricating operation. The nipple, Fig. 11, preferably comprises a threaded shank 164, an hexagonal portion 166, a conical portion 168 and a head 170, the latter being formed with a flat tip surface 172 bounded by a relatively sharp dirt-cutting edge 174, a frusto-conical upper half 176 and a spherical surfaced lower half 178. The radius of curvature of the surface 178 is substantially the same as that of the nozzle surface 290 and the edge 174 lies as shown in Fig. 13, on the spherical surface defined by said surface 178. A spring-pressed ball valve 194 is provided with the nipple. In a modification, Fig. 15, the nipple is formed with a drive shank having a groove 216 and ledge 217 so disposed that when the shank is driven into a hole in a bearing 88 a portion 219 of the bearing will be swaged by the ledge into the groove. The nipple may also be formed in two parts as shown in Fig. 14.