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. 15, 1997
Filed:
Dec. 07, 1995
Anthony M Claas, Waukesha, WI (US);
Dynex/Rivett, Inc., Pewaukee, WI (US);
Abstract
The disclosure relates to a pump having (a) a wobble plate, (b) a barrel, (c) a pair of piston assemblies reciprocated in the barrel by the wobble plate, and (c) a mechanism retaining the piston assemblies in contact with the wobble plate. In the improvement, the mechanism comprises a yoke member contacting the piston assemblies and a support member mounted to the barrel. The support member has a concave surface and the yoke member has a convex surface contacting the concave surface for bearing support. The support member coacts with the yoke member and permits oscillation of such yoke member in a plane substantially coincident with the barrel central axis. The new hold-down mechanism may be 'cascaded' in that the pump may also include another pair of piston assemblies and a second yoke member contacting the second pair of piston assemblies. A bearing component, e.g., a spherical ball, is interposed between the yoke members.