Regulator for liquefied petroleum gas systems
First Claim
1. A regulator, as for use in a fluid system, comprising:
- a valve body defining a high pressure chamber, a vented low pressure chamber and a passage between said chambers with a contiguous first valve seat;
a spring-biased diaphragm means affixed to said valve body for closing said vented low pressure chamber;
a valve stem means affixed to said diaphragm means and extending through said passage so as to be variously positioned therein under control of said diaphragm, said valve stem means including a stud affixed to extend coaxially from said diaphragm means,valve member means slidably disposed on said valve stem for cooperation with said first valve seat to regulate the flow of gas through said passage from said high pressure chamber to said low pressure chamber,said valve member means defining a second valve seat for cooperation with said valve stem means whereby a pair of concentric valves are provided in said regulator on said valve stem means, anda coil spring mounted on said stud between said valve member means and said diaphragm to spring bias said valve member.
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Accused Products
Abstract
A regulator is disclosed for receiving gas from a variable-pressure supply, to safely provide gas as to consuming appliances, in demand quantities and at a regulated pressure. A valve body of the regulator provides a metering passage between high and low pressure chambers, the low pressure chamber being isolated from ambient pressure by a spring-biased diaphragm. A valve stem is affixed to the diaphragm so as to extend through the metering passage and support a valve member for operation in cooperation with a first valve seat that is defined contiguous to the metering passage in the valve body. The valve member also defines a second valve seat and is spring biased for sliding movement on the valve stem so as to provide two distinct valve actions for high and low pressure operation. Accordingly, relatively consistent pressure is maintained over a wide range of flow rates as well as variations in the supply pressure. Also, the configuration of the disclosed embodiment avoids the development of high pressures on the low side in the event it is exposed to excessively high pressures.
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Citations
4 Claims
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1. A regulator, as for use in a fluid system, comprising:
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a valve body defining a high pressure chamber, a vented low pressure chamber and a passage between said chambers with a contiguous first valve seat; a spring-biased diaphragm means affixed to said valve body for closing said vented low pressure chamber; a valve stem means affixed to said diaphragm means and extending through said passage so as to be variously positioned therein under control of said diaphragm, said valve stem means including a stud affixed to extend coaxially from said diaphragm means, valve member means slidably disposed on said valve stem for cooperation with said first valve seat to regulate the flow of gas through said passage from said high pressure chamber to said low pressure chamber, said valve member means defining a second valve seat for cooperation with said valve stem means whereby a pair of concentric valves are provided in said regulator on said valve stem means, and a coil spring mounted on said stud between said valve member means and said diaphragm to spring bias said valve member. - View Dependent Claims (2, 3, 4)
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Specification