| 摘要 |
808,454. Reciprocating pumps. S.U. CARBURETTER CO. Ltd., and SIMMONDS ACCESSORIES Inc. Oct 17, 1957 [Oct. 27, 1956], No. 32849/56. Class 102(1) In a pump of the type described in Specification 552,547 the valve may be temporarily reorientated about its centre of rotation so that the liquid discharged from the pump chambers is returned to the inlet of the pump. The internally toothed annulus 30 co-operating with the valve is provided with external teeth 31 engaged by a gear 32, so that it can be partially rotated and the valve seat 14 is provided with grooves 42 communicating with the inlet and with which the arcuate parts 25 in the valve communicate when the valve is reorientated. The gear 32 may be connected to a diaphragm influenced by the inlet manifold pressure of an I.C. engine, the pump being the fuel injection pump thereof, or be manually actuated. |
