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US 6,305,081 B1Granted
Installing and servicing an HVAC system
AssigneeAmerican Standard International Inc.
InventorDanny D. Beaver
Life of this patent
Estimating the term…
Abstract
A valve in valve assembly. The assembly comprises a housing having an internal passage, a valve body in the housing and movably operable to control process fluid flow through the passage, and a chamber in the valve body. The chamber is open to the passage at a first chamber end. A valve core in the chamber controls service fluid flow the chamber.
Claims12
A method of installing and servicing an HVAC system comprising the steps of:
- providing a housing having an internal passage, a valve body in the housing moveably operable to control process fluid flow through the passage, a chamber in the valve body open to the internal passage at a first chamber end, and a secondary valve stem in the chamber and controlling access therethrough;
- attaching a service adapter to a second end of the chamber, the service adapter including a body arranged about an internal passageway, a first end on the body, a shaft in the internal passageway, and an extensor portion projecting from the shaft past the first end;
- contacting the secondary valve stem with the extensor portion of the service adapter;
- biasing the secondary valve stem with the extensor portion to an open position allowing service fluid flow through the chamber;
- and
- servicing process fluid through the chamber.
3 more elements
Dependencies are inferred from the claim text.