The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1990
Filed:
Jun. 02, 1989
Gordon C Slattery, Omro, WI (US);
Brunswick Corporation, Skokie, IL (US);
Abstract
A mechanical lubricating oil pump (126) includes a pump body (140) having a cylindrical chamber (142) and a reservoir (150) with an oil supply input (196) supplying oil from an oil tank (114) to the reservoir. A cylindrical rotator (144) is driven by a gear (162) and has a bore (146) receiving a piston (152) axially reciprocal therein and has a radial opening (148) in a cylindrical sidewall thereof communicating with the bore (146). The pump body (140) has an oil and air purge input first passage (168) communicating between the top of the reservoir (150) and the radial opening (148) in the rotator (144) during a first stroke at a first position of the rotator (144) during its revolution. The pump body (140) has an oil and air purge output second passage (180) communicating between a purge outlet (182) and the radial opening (148) in the rotator (144) during a second stroke at a second position of the rotator (144). The pump body (140) has an oil metering input third passage (186) communicating between the bottom of the reservoir (150) and the radial opening (148) in the rotator (144) during a third stroke at a third position of the rotator (144). The pump body (140) has an oil metering output fourth passage (188) communicating between a metered oil outlet (190) and the radial opening (148) in the rotator (144) during a fourth stroke at a fourth position of the rotator (144). Cams (192 and/or 2) cam the piston (152) and/or the rotator (144) to cause relative movement therebetween along the noted plurality of axial travel strokes changing the volume of the bore (146) during each revolution of the rotator (144). Differential stroking is provided to afford longer first and second strokes purging oil, and air if present, and shorter third and fourth strokes metering oil to an engine.