Patent GB-625020-A (GB)
Title: Improvements relating to lubrication systems
IPC: F16N21/04
Filed: 1946-02-20
Abstract: 625,020. Lubricating. TECALEMIT, Ltd., and LE CLAIR, C. C. S. Feb. 20, 1946, No. 5357. [Class 12 (iii)] [Also in Group XXVIII] A nozzle connected rigidly or by a universal pipe connection to a grease gun has a tapering conduit means, such as a needle-like hollow stem, which is thrust into a closure member or teat of a lubricant-receiving nipple on the part to be lubricated and which by the action of the taper forces open the passage way in the teat or closure member ; the needle-like stem may be fixed to the nozzle body and inserted in the teat by manual pressure on the gun, Fig. 6, or it may be carried by a piston-like member, Figs. 2 and 5, slidable in the nozzle body andthe needle projected outwardly through a hole in the bottom face of the nozzle body to enter into the teat. The nozzle is adapted to be temporarily clamped on to the nipple by being hooked thereover by fixed jaws formed on the base of the nozzle, Fig. 1 (not shown), or by means of movable clamping jaws operated by the lubricant pressure, Figs. 2 and 5, or by a manual or mechanicallyactuated sleeve, Fig. 15. As shown in Fig. 2, the nozzle body 38 supplied from the grease gun through a hollow shank 39 has an inner chamber 37 in which is slidably mounted a piston-like member 43 provided with a cup washer 44 and carrying a needle-like hollow stem 46 which under pressure of the lubricant is projected through a hole 18 in the closed bottom 40 of the inner chamber of the nozzle to enter into a rubber closure teat 35 of a lubricant-receiving nipple. The nipple has a head with a cylindrical upper portion 33 entering a recess 42 in the base of the inner chamber of the nozzle to centre the same so that the needle 46 registers accurately with the normallyclosed piercing made in the rubber teat 35. The nipple head has a hemi-spherical under portion 34 which is embraced by clamping jaws 50 when these are forced downwards past inward inclines 51 at the bottom of the outer body 38 of the nozzle by the lubricant pressure acting on a ring piston 49 sliding in an outer annular chamber 48 of the nozzle. In the form shown in Fig. 5, the nozzle has only a single chamber 62A wherein slides an outer piston-like member 61A which in turn houses the piston-like member 80A carrying the (needlelike hollow stem ; the outer piston-like member carries the clamping jaws 69A which can swing outwardly, but are axially fixed with the outer piston-like member 61A. These clamping jaws are serrated to engage corresponding serrations 88 on the nipple 90 against which they are forced by the inward inclines at the lower end of the nozzle body when this, under the lubricant pressure, rises relatively to the outer piston-like member 61A, the base of which is placed on the nipple. The needle-like stem is subsequently projected against the action of its stronger spring into the closure teat of the nipple. The form shown in Fig. 6 with a needle-like hollow stem 102 fixed relatively to the grease gun 99 is centred on the nipple by a sleeve 104 slidable backwardly against the action of a spring 105 ; the sleeve 104 serves also to protect the needle-like hollow stem when the grease gun is not in use. Fig. 15 shows clamping jaws 117 forced into engagement by the downward movement of a sleeve 119 such movement being effected by some mechanical action or by simply screwing downwardly. Specifications 430,827, [Group XXVIII], and 625,019 are referred to.