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US 2003/0147758 A1Published application
Oil pump and gears
AssigneeS & S Cycle, Inc.
InventorsJames B. Havlik, Brent Glick, Todd Olson
Life of this patent
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AssigneeS & S Cycle, Inc.
InventorsJames B. Havlik, Brent Glick, Todd Olson
Estimating the term…
An oil pump for an internal combustion engine includes a pump body with a first gear chamber and a second gear chamber, and a cover mounting to the pump body. The pump also has a check valve and a pressure relief valve in fluid communication with the gear chambers. The oil pump has a supply set of intermeshing involute spur gears in the first gear chamber with nine involute teeth. A return set of intermeshing involute spur gears with the same gear profile as the supply gears is housed in the second gear chamber. Both sets of gears are driven by a common drive shaft so that the pump may be retrofitted to existing engines. The profile of the gears provides for improved pump volume without increasing angular velocity or gear diameter over gears of the prior art. The return gears are deeper than the supply gears to provide an improved supply to return flow ratio.
An internal combustion engine oil pump, comprising:
An oil pump gear, comprising a spur gear having nine teeth spaced about a periphery of the gear, wherein each tooth has an involute profile, wherein the diametral pitch of the gear is 12, and wherein the pressure angle of the gear is about 20 degrees.
A method of increasing oil flow in an oil pump, the pump having a body, a cover, a first set of intermeshing supply gears and a first set of intermeshing return gears driven off a common drift shaft, the method comprising the steps of:
An oil pump, comprising:
Dependencies are inferred from the claim text.