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:
Jul. 12, 1983
Filed:
Apr. 03, 1981
Charles J Bowden, Battle Creek, MI (US);
General Signal Corporation, Stamford, CT (US);
Abstract
An improved gear pump or motor includes seal plates (30, 32) having a lubrication channel (48, 50) communicating between the shaft bearings (18, 20, 22, 24) and the low pressure side of the zone (62) where the gear teeth (58, 60) intermesh. Lubricant flow is directed first through one bearing on one side of the pump and then back through a separate channel (54, 56) to the other bearing on the same side of the pump. Placement of the lubrication channels on the low pressure side of the pump where the volume between intermeshing teeth is increasing and the pressure between the teeth is below inlet pressure ensures that flow reversals in the bearings and lubricant aeration are avoided; and renders bearing flow rate less sensitive to pressure, so that relatively large flow channels may be used in the wear plate.