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. 05, 1985
Filed:
Oct. 07, 1983
Chester G DuBois, Zion, IL (US);
Outboard Marine Corporation, Waukegan, IL (US);
Abstract
A fluid driven pump comprising a pump housing defining a recess including therein a moveable wall which divides said recess into a variable volume driving chamber and a variable volume pumping chamber. The pump also includes a pressure inlet communicable with the driving chamber and adapted to communicate with a source of pressure which oscillates between an operating pressure and a pressure different from the operating pressure. The pressure inlet includes a one-way valve for permitting fluid under the operating pressure to communicate with the driving chamber to move the moveable wall in one direction when the driving chamber is in communication with the pressure inlet. The pump also includes a vent communicable with the driving chamber and adapted to communicate with a source of pressure different from said operating pressure, a spring for moving the moveable wall in the opposite direction when the driving chamber is in communication with the vent, and a shuttle valvearrangement for selectively controlling communication of the driving chamber with the pressure inlet and the vent. In another embodiment, the vent is adapted to be in communication with the oscillating pressure source and the spring is replaced with a one-way valve in the vent for permitting fluid under the pressure different from the operating pressure to communicate with the driving chamber.