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:
Feb. 26, 1991
Filed:
Jan. 09, 1990
Dennis L Bonacorsi, Howell, MI (US);
Donald E McGeachy, Milford, MI (US);
Alan L Smith, Livonia, MI (US);
Numatics, Incorporated, Highland, MI (US);
Abstract
A lock-out valve is designed to direct pressure fluid to an operational port and system, and to exhaust such pressure for purposes of repair or reconstruction of a valve controlled system. The valve may be quickly moved to the exhaust phase by a manual stroke overriding threads between two concentric parts. However, reverse motion of the valve to re-establish pressure to the operational port can only be accomplished by a turning action on the manual actuator. This insures a slow return of pressure to the system and a slow start up so that the controlled system can be safely and properly reset. The thread design is such that the motion in one direction will override the threads but prevent reverse action except by turning.