Patent ID: 7137789
Filing Date: 2006-11-21
Classification: F01M,F04C

Abstract:
1. An improved pump assembly for use with a motor comprises: a. a pump housing having a pump cavity; b. a first and second gear positioned in said cavity for pumping fluid, said first gear being operably and sealably connected to a motor shaft for rotation said shaft being positioned through a seal bore, and said second gear rotatably mounted to a second shaft for geared rotation with said first gear; c. fluid inlet and outlet ports in communication with said cavity and adapted for connection with a source of fluid and a discharge means, respectively; d. a shaft seal which seals said pump cavity from said motor shaft; and e. an internal vent positioned between said shaft seal bore and said inlet port, wherein said vent connects said bore to said inlet port thereby decreasing the pressure in the area of said seal.