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:
Jul. 11, 1989
Filed:
Dec. 07, 1987
Applicant:
Inventors:
Ayzik Grach, Creve Coeur, MO (US);
Thomas M Arens, Florissant, MO (US);
Assignee:
McNeil (Ohio) Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
91306 ; 91308 ; 91313 ; 91316 ; 91461 ;
Abstract
An air-operated expansible chamber motor comprising a cylinder having first and second end heads, a piston reciprocable in the cylinder, a spool valve for controlling the supply to and exhaust of air from opposite ends of the cylinder, a relay valve mounted in one of the end heads for controlling the spool valve, a pilot valve in each end head having a stem engageable by the piston for controlling the relay valve via pressurization and exhaust of a pilot line, and a bleed for feedback of pressure air to the pilot line.