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:
Jan. 23, 1979
Filed:
Jul. 15, 1977
Larry W Lorimor, Joliet, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A valve assembly has a housing, a spool positioned in the housing, and a sleeve positioned about the spool. The housing has an inlet and first and second outlets. The spool is movable between a first position at which communication between the inlet and second outlet is blocked and a second position at which the inlet and second outlet are in communication. The spool is movable to the second position in response to the inlet fluid pressure exceeding a preselected value. The sleeve is movable between a first position at which communication between the first outlet and inlet is blocked and a second position at which the inlet communicates with the first outlet. The sleeve substantially maintains the pressurized fluid in the first outlet while in the first position.