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:
Aug. 10, 1976
Filed:
Dec. 12, 1974
Applicant:
Inventor:
Heinz Schmoll, Heide, DT;
Assignee:
Schloemann-Siemag Aktiengesellschaft, Dusseldorf, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B / ; F15B / ;
U.S. Cl.
CPC ...
1376371 ; 91449 ; 91454 ; 91461 ; 13759615 ; 13759616 ;
Abstract
A hydraulic interlock arrangement for ensuring that an inlet valve is closed before a discharge valve is opened, and vice versa, each inlet or discharge valve having a hydraulic piston-cylinder unit for actuating the same, a hydraulic pilot valve for operating the piston-cylinder unit and a blocking member for preventing actuation of the pilot valve, the first blocking member being connected to the pressure chamber of the second piston-cylinder unit, and vice versa, so that when the pressure chamber in one piston-cylinder unit is under pressure, the pilot valve of the other piston-cylinder unit cannot be actuated.