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:
Sep. 03, 1996
Filed:
Sep. 02, 1994
Paul K Nelson, Shoreview, MN (US);
Jerry K Hammer, Jr, Hugo, MN (US);
The Specialty Mfg. Co., St. Paul, MN (US);
Abstract
An improved adjustable pressure relief valve having an adjustable biasing apparatus engaged thereto and exerting a biasing force on a fluid valving device. The valving device has a pressure bearing component that defines a fluid retaining boundary and is acted upon by a fluid under pressure. The fluid pressure exerts a force upon the fluid bearing component counter to the biasing force acting upon the fluid bearing component. The improvement comprises a pressure bearing component retaining device disposed within the pressure relief valve for presenting a barrier to the pressure bearing component, whereby the fluid retaining boundary defined by the pressure bearing component of the valve is maintained in the event of disengagement of the adjustable biasing apparatus from the fluid valving device of the pressure relief valve while the fluid under pressure is acting on the valving device.