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. 31, 1978
Filed:
Jul. 22, 1976
Applicant:
Inventor:
John L Crewse, Parma Heights, OH (US);
Assignee:
The Cleveland Vibrator Company, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F15B / ; F15B / ;
U.S. Cl.
CPC ...
91 39 ; 91416 ; 91459 ; 91468 ; 9216 / ;
Abstract
A springless impact device including a piston-cylinder mechanism having at least one preselected coacting port and passageway operatively connected to a valve pressurized fluid control apparatus which selectively feeds and exhausts pressurized fluid to and from the device in a predetermined manner. There is an area differential between the top and bottom ends of the piston head. The device includes an inverted 'U'-shaped seal ring on the piston head which functions as a one-way check valve to effect piston reciprocation in coaction with the area differential on the piston head.