Patent ID: 6113360
Filing Date: 2000-09-05
Classification: F04C

Abstract:
A gerotor pump for pumping fluids comprising:a pump housing;an internally toothed gear member rotatably disposed within said pump housing;an externally toothed gear member rotatably disposed within said pump housing, with said externally toothed gear member cooperating with said internally toothed gear member to define a plurality of variable volume pumping chambers whereupon during rotation of said gear members, a pumping chamber increases in volume to a maximum volume then decreases in volume;a generally arcuate inlet port formed in said pump body, with said inlet port communicating exclusively with pumping chambers that are increasing in volume;a generally arcuate outlet port formed in said pump body, with said outlet port communicating exclusively with pumping chambers that are decreasing in volume; and,a pressure relief return flow guiding system, comprising a pressure relief port, communicating with said outlet port and said inlet port for directing excess fluid from said outlet port to said inlet channel, with fluid flowing in said port in a direction opposite to fluid flowing in said inlet and outlet channels, and a flow guide, disposed at one end of said relief port adjacent to said inlet channel, with said flow guide directing fluid flow from said relief port to said inlet port such that said fluid flows in a same direction as fluid flow in said inlet channel.