Patent GB-742989-A (GB)
Title: Improvements in or relating to lubrication
IPC: F16N13/02
Filed: 1952-09-23
Abstract: 742,989. Lubricating. AUTO RESEARCH CORPORATION. Sept. 23, 1952 [Oct. 1, 1951], No. 23872/52. Class 12 (3). A central lubricant pump-reservoir combination comprises a gear pump arranged to deliver lubricant from a reservoir to a chamber having an outlet flow passageway connected by tubing to bearings to be lubricated, and a manually-operated reciprocating valve to give high flow jet feed at desired intervals, including a reciprocatory valve piston arranged to reciprocate in the chamber between an inoperative position and a jetting position in which the lubricant discharge of the pump is fed to selected bearings. In the arrangement shown, a cover A adapted to be clamped to a reservoir for lubricant, is provided with a drive-shaft 21 connected through worm gearing and a vertical shaft 51 with a gear pump C which pumps lubricant from the reservoir through a filter 120. The shaft 51 has a worm 60 meshing with a gearwheel 61 on a shaft carrying a worm 64 meshing with a gear-wheel 75 on a shaft 76. The other end of the shaft 76 has a cam wheel 79 formed with a notch 80 for engagement by the nose 81 of a follower lever 82. The other end of the lever has a claw 85 which engages a collar 86 on a vertical sleeve 87 whereby the sleeve is raised against spring action when the nose 81 is resting upon the circumference 89 of the cam 79. In this position of the sleeve a ball valve 102 is free to be pressed up by the lubricant. Normally the pump supplies lubricant through passages 130, 124, 127 to a valve chamber 128 from which part of the lubricant is fed continuously through passageway 132 to piping K, E to certain parts to be lubricated. Some lubricant passes a ball valve 129 to a space below the ball valve 102. When the valve is free to move upwardly the lubricant passes by way of conduits 210, 136 to a gear chamber 53 and eventually after having lubricated certain bearings, returns to the reservoir. When the notch 80 in the cam 79 receives the nose 81 of the follower lever 82, the ball valve 102 is held against its valve seat, and the lubricant is diverted to a conduit D leading past a check valve 135 to a line P connected to certain lubricating points. These points are thus lubricated intermittently, but they may receive additional lubricant through the provision of the manually-operated button L which, when pressed down, keeps the ball valve 102 on its seat irrespective of the relative positions of the cam notch 80 and the nose 81. Other lubricating points receive a jet feed of lubricant through tubing M and N by means which include a push-button H. When the button is depressed against the action of a spring 203, a sleeve 202 cuts off communication between the pump and passageways 127 and 132, and lubricant flowing through a vertical passageway 200 and a horizontal passageway 201 is brought into communication with a passageway 142 leading to tubing M, N and to certain lubricating points. A safety valve 194 is lifted to allow the lubricant to flow through passageway 199 back to the reservoir, if the lubricant pressure is excessive. The lubricant may be delivered through metering fittings each comprising a filter preceding a passageway substantially filled by a pin which has a high flow restricting effect.