GB789375A - A pump or engine of the oscillating-vane type - Google Patents

Abstract

789,375. Rotary engines and pumps. DELMER, H. April 28, 1954 [April 29,1953], No. 12271/54. Class 110 (2). The engine or pump comprises a piston 6, oscillating about a pivot 7 to sweep through crescentshaped working chambers C formed between the piston and a casing bore B. A parking block 13 bears over an arc D in a baseplate 10, the curve being struck on a radius R with centre P. A shaft, in a bearing, extends into a slot 14, within the piston, to which it is coupled by an eccentric 19, on the shaft, a link 15 being mounted through a bearing 17 on a pin 18. For a pump suction and delivery ports, containing non - return valves, are provided for each working chamber. Fig. 2 shows spring-loaded suction and delivery valves carried in a plate 31 which is secured to the casing of the pump. The plate has suction ports 33, direction Z, arranged in a ring, and another ring of ports 38 for delivery of the fluid in the direction W. Openings 34, communicating with ports 33, are closed by a ring 35, held on its seat by springs 36 which bear against a circular abutment, centred about an axis 42 and provided with openings 331 and 38<SP>1</SP> corresponding to the ports 33, 38. Similarly the ports 38 are closed by a ring 39 held on its seat by springs 40 which bear against a circular abutment 41, also centred on an axis 42 and provided with opening 38<SP>11</SP> forming a passage for the discharge W. In operation, the rings 35, 39 alternately reciprocate against the pressure of springs 36, 40. Steel pistonrings 50, pressed axially by springs 51, act as end packings on the piston. Cooling fins 2 are provided on the casing.