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:
May. 22, 1979
Filed:
May. 18, 1977
Applicant:
Inventors:
Karl Krieger, Wuppertal, DE;
Horst Schurmann, Hattingen, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B / ; E03B / ; F16K / ; F15B / ;
U.S. Cl.
CPC ...
1375962 ; 137549 ; 9117 / ;
Abstract
A multiple valve control device for use with a hydraulic walking mine-roof support frame, comprising a valve housing containing control valves which are disposed concentrically to a central axis around a central filter into which an axially-extending control-medium feed duct enters and from which radial bores extend in a star pattern towards the control valves, the said control valves, which are provided with valve pistons, being actuated via operating members from the valve-housing endface which is provided with a cover.