Patent ID: 7220111

Claim:
A fluid pump comprising: a hollow housing including a lateral wall spaced radially from and extending along a central axis, and an end wall located at an axial end of said lateral wall; an insert located in said housing and surrounded by said lateral wall, including a body facing said end wall having a central aperture, an inlet fluid channel, and an outlet fluid channel in fluid communication with said central aperture; a seal located between said end wall and said insert for sealing against fluid flow therebetween; an outer gear located in said housing adjacent said insert, including a radial inner surface formed with lobes having angularly spaced peaks and valleys extending around said radial inner surface; an inner gear located adjacent said insert and surrounded by said outer gear, including a radial outer surface formed with lobes having angularly spaced peaks and valleys extending around said radial outer surface, being complementary to and engaging said lobes of said outer gear, a first number of said lobes on said radial outer surface being at least one less than a second number of said lobes on said radial inner surface, for pumping fluid located in spaces between said lobes from said inlet fluid channel to said outlet fluid channel as said inner gear rotates relative to said outer gear; a cover fitted to said housing, having an aperture, including a surface spaced axially from said end wall and located adjacent said inner gear and said outer gear, secured to and closing said housing; and wherein said housing further comprises multiple hems, each said barn extending axially from and along a portion of a circumference of said lateral wall, and multiple slots located angularly between adjacent ones of said hems at said circumference of said lateral wall, and said cover further includes an arm formed integrally with multiple tabs, each said tab extending radially through a corresponding one of said slots, whereby said cover is secured to said housing.