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:
Mar. 01, 1977
Filed:
Oct. 03, 1975
Applicant:
Inventor:
James G Starling, Peoria, IL (US);
Assignee:
Caterpillar Tractor Co., Peoria, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762569 ; 1376253 ; 13762568 ;
Abstract
A manually operated clutch valve adapted for use with a forward-reverse clutch provides modulated flow by use of a combination of linearly tapered metering slots and passages on the valve spool lands. The valve provides for linear pressure rise for proportionate lever movement in addition to the capability of selection of forward or reverse clutch engagement. Linear pressure rise occurs until about 90% of the maximum spool travel has been achieved at which point the full flow is abruptly provided to produce engagement of the clutch and thereby prevent a stick clip clutch condition.