F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
103/24
F02M 39/02 (2006.01) F02M 41/06 (2006.01) F02M 55/00 (2006.01) F02M 59/06 (2006.01) F02M 59/30 (2006.01) F02M 63/02 (2006.01) F02M 69/12 (2006.01)
Patent
CA 1260758
ABSTRACT A liquid pump having a gear pump for receiving inlet liquid, and a multi-piston pump receiving liquid from the gear pump for delivery to separate liquid distributors The multi-piston pump has radial pistons with bases positioned against side surfaces of a rectangular member which is driven in an orbiting motion via an eccentric member which is radially movable against resilient bias so that its eccentricity varies with driving speed, to correspondingly vary the reciprocatory stroke of the pistons. Each distributor has a hollow cylindrical member with a first set of alter- nating inlet and outlet ports and a second set of alternating inlet and outlet ports axially spaced from the first set. An axially rotatable spindle is sealingly rotatable in the member and this has axially spaced and sidewardly open cavities. Liquid is admitted to the cavities at times during spindle rotation when the cavities are aligned with respective ones of the sets of inlet ports and is expressed from the cavities when these are aligned with respective ones of the sets of outlets ports. Expression is effected by an axially slidable pin which is reciprocated, under alternately applied liquid pressure in each cavity, to move into the opposite cavity to effect liquid displacement. The spindles of the two distributors are driven from the gear pump, but the times during each rotational cycle at which delivery of liquid occurs from one distributor are variable by variation of the angular displacement of the spindle of that distributor relative to its drive shaft from the gear pump. This variation is effected by an advancing mechanism having cam members acted on by an annular piston which is subjected to delivery pressure from the gear pump to advance the delivery times in each rotation of the spindle, when the delivery pressure from the gear pump rises.
486246
Kirby Eades Gale Baker
Lampard Robert D.
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