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:
Jun. 02, 1981
Filed:
Apr. 30, 1979
George J Jackson, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A hydraulic assembly including a valve having a body (40), an elongated chamber (42) having a wall and a conduit (60) in the body, a valve spool (44) movable within the chamber, a drive (48) for the spool, an elongated sleeve (50) within the chamber and spaced from the wall thereof, the sleeve movably receiving the spool in a substantially fluid tight relation and having at least one port (52) for fluid flow with the flow through the port being controlled by the position of the spool within the sleeve, resilient washers (56) spacing the sleeve from the chamber wall and yieldably supporting the sleeve within the chamber, and yieldable fluid connections (64) extending between the port in the sleeve and the conduit in the body so that deflection in the body need not cause deflection of the sleeve so that binding tendencies between the spool and the sleeve are avoided.