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. 09, 1993
Filed:
Jan. 21, 1992
Applicant:
Inventor:
Robert E Raymond, Zanesville, OH (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13762548 ; 13762566 ; 13762569 ;
Abstract
A shrunk fit annular valve sleeve assembly characterized by a land configuration which provides a reduced annular area of engagement with the surrounding housing compared to the annular area of the base portion of the land disposed inwardly toward the spool bore to reduce the effects of temperature changes which cause spool bore deflection when using different metals for the housing and the sleeve. One preferred embodiment of a valve sleeve described defines a generally truncated triangular upraised land formed by complimentary shaped adjacent recesses when the sleeve is viewed in a section taken along a radial plane perpendicular to the axis of the spool bore.