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:
Dec. 29, 1992
Filed:
Jan. 30, 1992
Applicant:
Inventors:
Perin E Truax, Caledonia, MI (US);
Eldon D Jackson, Hastings, MI (US);
Assignee:
The Viking Corporation, Hastings, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137469 ; 1375153 ; 137536 ; 137540 ;
Abstract
An in-line check valve includes a housing defining a cavity with an inlet and an outlet, a removable seat attachable to the inlet, a piston movably positioned in the housing and including a seal that operably engages the seat, and a spring positioned around the piston for biasing the piston into engagement with the seat. The piston defines a surface impinged on by fluid flowing therethrough so that the differential pressure across the valve in a given flow range is less than the opening pressure. The housing defines a plurality of lugs which retain the piston within the housing and permit servicing of the seal.