GB124965A - Improvements in Fluid Pumps or Compressors. - Google Patents

Abstract

124,965. Neighbour, A. G. L., and Neighbour, H. C. W. June 11, 1918. Valves, arrangement of. - A pump or compressor comprises a cylinder 1 in which a piston 2 is reciprocated by a crank-pin 7 on a shaft 5 rotatably mounted in a bearing 4 in a boss 3 on the cylinder. The pin 7 engages a valve-block 13 slidably mounted in a transverse slot 9 in the piston and controlling the admission of fluid to the ends of the cylinder through ports 17 in the piston. The slot 9 ends in a recess 16, which is always open to the inlet 15. The fluid is delivered through valves 18 into a delivery chamber 19 provided with an outlet 20. The piston may carry a pin 21 engaging a slot in the cylinder to prevent it from rotating. The pump may carry a flange 28 for attachment to a wall, &c., or it may be mounted on feet. In assembling the parts the valve block is inserted in the slot 9, the piston is then placed in the cylinder in mid-stroke position, the shaft 5 is passed through the bars 3, the pin 7 is pushed into the block 13, and the bearing 4 is then placed on the shaft 5 and fixed. In a modification, the valve block is hollow and longer than the block shown in Fig. 1, and has ports in its walls, adapted to register with the ports 17; and the cylinder has two opposite reverses, one containing' the inlet, the other containing lubricant into which the end of the valveblock dips in its lowest position.