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. 07, 1992
Filed:
Oct. 12, 1989
Applicant:
Inventor:
Reinhard Amrhein, Frammersbach, DE;
Assignee:
Mannesmann Rexroth GmbH, Lohr, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762569 ; 1376253 ; 13762566 ; 13762568 ; 251324 ; 251325 ;
Abstract
A valve comprising a valve housing, a bore in said valve housing, annular grooves defining annular channels arranged in said valve housing and adapted to be connected to valve ports arranged in said housing, a control spool reciprocally mounted within said bore so as to connect and separate said valve ports, and land means in at least one of said annular channels so as to block the rotation of said control spool, said land means extending into said at least one channel transversely to the direction of flow of the pressure medium, said land means extending substantially radially into said annular channel.