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:
Feb. 05, 1985
Filed:
Apr. 22, 1983
Borje O Rosaen, Ann Arbor, MI (US);
Other;
Abstract
A valve assembly is disclosed which comprises a housing having at least two fluid ports which are adapted for connection to a fluid system. A piston is slidably mounted in the housing and movable between a first position in which the fluid ports are fluidly connected and a second position in which the fluid ports are fluidly disconnected. A seal is carried by the piston and engages a sealing surface in the housing when the piston is in its second position. A scraping member is also carried by the member so that the scraping member passes across and engages the sealing surface as the piston is moved from its first and to its second position thereby cleaning the seal surface. Preferably an eccentric cam is employed for moving the piston between its first and second positions.