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. 10, 1977
Filed:
Oct. 01, 1975
Applicant:
Inventor:
Verne P Donner, Palatine, IL (US);
Assignee:
Deltrol Corporation, Bellwood, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F01L / ;
U.S. Cl.
CPC ...
91356 ; 91318 ; 91337 ; 13762427 ;
Abstract
A pressure responsive semi-automatic directional control valve for controlling a hydraulic cylinder. Manual movement of the valve from neutral to starting position applies pressure to one side of the cylinder. The pressure buildup at the end of this stroke causes the valve to move to return position. The pressure build up at the end of the return stroke then causes the valve to return to neutral position. A modification causes movement of the valve back to starting position thus providing continuous repeat cycle operation of the control valve.