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:
Nov. 08, 1988
Filed:
Apr. 24, 1987
Terry G Young, Houston, TX (US);
Neil H Akkerman, Houston, TX (US);
AVA International Corporation, Houston, TX (US);
Abstract
There is disclosed a pneumatic gate valve actuator adapted to move the gate of the valve between opened and closed position by the introduction of air pressure into or the exhaustion of air pressure from an expandable and contractible pressure chamber formed within a tire casing and between upper and lower plates having their peripheries connected to inner edges of a tire casing. The lower plate is connected to the stem for the gate, the upper plate is connected to the bonnet of the actuator, and a coil spring is compressed between the lower plate and the bonnet, so that the gate may be moved to open position upon the supply of air pressure to the chamber, and moved to closed position upon the exhaust of air pressure from the pressure chamber.