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:
Jul. 28, 1998
Filed:
Apr. 30, 1996
Alain Francedilla.ois Lavie, Yerres, FR;
Claude Marcel Maillard, Vulaines sur Seine, FR;
Abstract
A valve is disclosed which is adapted to be disposed between a first chamber and a second chamber for the purpose of selectively interconnecting the two chambers or isolating them from one another. The valve comprises a body, a sleeve disposed therein and provided with a number of orifices which open into a first duct in the body for the delivery of fluid to the second chamber, and a piston which is slidable in the sleeve to close or open the orifices and which separates a feed chamber communicating with the first chamber from a control chamber communicating, by way of a second duct, with the throat of a venturi formed in the first duct. The opposite faces of the piston are thus both exposed to the fluid, and a spring is provided in the control chamber for biassing the piston towards closing the orifices.