US 4,231,714 AGranted

Hydraulic pump system

OwnerWilliam W. Colwellinventor

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Abstract

A pump system for high pressure hydraulic applications. A series of longitudinally spaced single acting pumps are sequentially actuated by rolling heavy weights that are moved about an endless upright track assembly by gravity assisted by operation of a prime mover. The track assembly includes an elongated inclined ramp, a horizontal base, and a relatively steep return arranged in a triangular supporting structure for an endless conveyor. The conveyor mounts a plurality of longitudinally spaced weight assemblies, which are arranged transversely between supporting endless chains. A series of pumps are mounted on the frame in fixed positions with their single acting actuators in the path of elements moved in unison with the conveyor. The pumps are preferably spaced apart a distance substantially less than the spacing between the weight assemblies and the spacing between adjacent weight assemblies is preferably not an even multiple of the spacing between the pump mechanisms.

Claims7

Dependent claims

A hydraulic pump system, comprising:

an inclined ramp having first and second longitudinally spaced ends, the first end of said inclined ramp being elevationally higher than its second end;
endless conveyor means including an upper flight guided along said inclined ramp and a return flight positioned beneath said inclined ramp;
power means operatively connected to said endless conveyor means for imparting motion thereto in a direction such that the upper flight of the endless conveyor means is moved along the inclined ramp from its first end to its second end;
a plurality of equally spaced weight assemblies mounted along the length of the endless conveyor means for integral movement therewith;
and a plurality of pump mechanisms located along the inclined ramp;
each pump mechanism being operatively connected to a common liquid supply and a common discharge manifold;
each pump mechanism further comprising a single acting actuator intersecting the path of movement of the weight assemblies along the upper flight of said endless conveyor means, whereby said pump mechanisms are sequentially actuated in response to movement of the weight assemblies along the upper flight of said endless conveyor means.

4 more elements

Dependencies are inferred from the claim text.