| 摘要 |
<p>1,007,603. Reciprocating pumps. TRICO PRODUCTS CORPORATION. Nov. 28, 1961 [Nov. 29, 1960], No. 42504/61. Heading F1A. A suction-operated windscreen washer pump comprises a piston 25 connected to a spring- loaded diaphragm 56 which defines a suction chamber 38 which is alternately connected to a source of suction and to atmosphere by a valve 52 which oscillates about an axis parallel to the piston axis. The piston is reciprocated to the left, Fig. 3, by suction from the engine intake manifold when the valve 52, which oscillates about a pivot 51, is in the position of Fig. 2 in which the suction inlet 48 is connected through the valve 52 to ports 54 leading to chamber 38 and is moved to the right on its pumping stroke by the spring 33 when the valve 52 is rotated to open the ports 54 to the chamber 85 connected to atmosphere through a filter 86. The piston 25 has spiral grooves 66 which cause oscillation of a shaft 67 connected to an arm 72 which co-operates with a toggle device 74 to oscillate the valve 52 at the end of each piston stroke. The pump has flap type inlet and outlet valves and the suction connection 48 is controlled by a manually operated valve on the vehicle dashboard. The piston is sealed by a sealing ring 30 and the pump is mounted on the vehicle by a mounting plate 91 closing the valve chamber 85. In a modification the manual valve in the pipe 48 is dispensed with and the pump reciprocation is stopped by a detent device which holds the member 52 in inoperative position.</p> |
