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:
May. 15, 1990
Filed:
May. 26, 1989
Viljo K Valavaara, Mississauga, CA;
Fluid Jet International Inc., Toronto, CA;
Abstract
A valve for use in association with a pressure chamber and having a valve body with a passageway therethrough, and an upstream valve surface and a downstream valve surface, an inlet conduit formed in the valve body communicating with the upstream surface, a valve stem located within the passageway adapted to permit flow of fluid through the passageway, an upstream valve head attached to the stem to seal the inlet conduit, an outlet conduit in the valve head to permit flow from the pressure chamber to the valve passageway, and a valve cap on the other end of the valve stem, the valve head and valve cap being movable relative to one another. Also disclosed is a piston for use in conjunction with such a valve having a configuration to reduce unswept volume.