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. 08, 1994
Filed:
Mar. 08, 1993
Russell D Jensen, Modesto, CA (US);
Parker Hannifin Corporation, Cleveland, OH (US);
Abstract
A filter head with an integral priming pump (10) is adapted to engage a replaceable filter or separator element (20). The head has an axial stepped bore (46). The bore has a first area (52) in fluid connection with an inlet (14) which delivers fuel to the head. A second area (54) of the bore of larger diameter is in fluid connection with a pumping chamber (77) of a pump portion (18) of the head. A third area (60) of the bore is in fluid communication with a fluid in-flow area of the element through a spud (24). A first body (86) and a second body (88) are movably positioned in the bore. The first body is sized for blocking a first opening (56) between the first and second areas. The second body is sized for blocking a larger second opening (62) which extends between the second and third areas. Manually depressing and releasing a cover member (76) of the pumping portion of the head causes pressure and vacuum to be alternatively applied in the second area of the bore. As a result, the bodies are alternatively disposed from their adjacent openings and fuel is caused to be drawn from the inlet through the bore and into an in-flow area of the element to accomplish a priming operation. In normal running condition fluid passes through the head and both bodies are disposed away from their respective openings in the bore to minimize flow restriction.