Document Type and Number:
Japanese Patent JPS5052604
Kind Code:
A
Abstract:
A hydraulic pump comprises a pair of chambers and a plunger which extends axially through both chambers and provides a valve-controlled fluid flow path between the two chambers such that fluid is transferred from one chamber, acting as a reservoir, to the other chamber in response to reciprocation of the plunger. The plunger is displaceable by means of a lever system which is effective to vary the rate of displacement of the plunger so that plunger travel for a given lever movement is greater initially than towards the end of the plunger stroke. The lever system is arranged so that it imparts only substantially axial forces to the plunger during reciprocation thereof.
Application Number:
JP4715374A
Publication Date:
May 10, 1975
Filing Date:
April 27, 1974
Export Citation:
International Classes:
F04B9/14; F04B9/02; F04B53/12; F04B53/16; (IPC1-7): F04B9/14