Variable-stroke constant-compression-ratio reversible radial pump

Abstract

A variable-stroke, constant-compression, reversible radial pump, the stroke of which may be infinitely adjusted by means of a variable-throw eccentric from a normal-cycle maximum through zero to a reverse-cycle maximum, and the compression of which is maintained constant through the use of a variable-geometry cylinder-head assembly. The cylinder geometry varies when the cylinder head is raised and lowered by means of a synchronized screw arrangement which is coupled through a gear set to the variable-throw eccentric. The variable throw-eccentric comprises a hollow input shaft which is drilled and threaded diametrically. A threaded, splined adjustment shaft is screwed into the threaded diametric hole in the input shaft. Each end of the adjustment shaft is mounted in bearing races which are anchored at diametrically opposed points in a connecting-rod journal. The adjustment shaft may be rotated by means of a rack gear which slides back and forth within the hollow portion of the input shaft and operates on the splines of said adjustment shaft. As the threaded, splined shaft is rotated, the position of the journal with respect to the input shaft is changed, which equates with a change in drive eccentricity and stroke of the pump.

Dependencies are inferred from the claim text.