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. 07, 1989
Filed:
Jan. 02, 1987
James R Willson, Ashland, MA (US);
Kidde, Inc., Saddle Brook, NJ (US);
Abstract
A gas flow control device including a body means defining an inlet, an outlet and a gas flow passage therebetween a main valve disposed in the passage and comprising a primary valve movable between a closed position that prevents flow through the passage and an open position that permits flow therethrough; a primary diaphragm operably connected to the primary valve and supported by the body means, the primary diaphragm defining within the body and separating a primary reference chamber from a primary regulator chamber located in the passage and the pressure in the primary reference chamber exerting a force tending to open the primary valve; and a primary bias means biasing the primary valve toward its open position. Also included in the device is a secondary valve disposed in the passage between the primary valve and the outlet, the secondary valve movable between a closed position that prevents flow through the passage and an open position that permits flow therethrough; a secondary diaphragm operably connected to the secondary valve and supported by the body, the secondary diaphragm defining with the body and separating a secondary reference chamber from a secondary regulator chamber located in the passage and the pressure in the secondary regulator chamber exerting a force tending to close the secondary valve; a secondary bias means biasing the secondary valve toward the open position and a control passage providing communication between the primary reference chamber and the outlet.