Double directional check valve and flow restrictor combination
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorHang-Chung Lee
Life of this patent
Estimating the term…
Abstract
A double directional check valve and flow restrictor combination including a housing which contains a pair of axially-aligned check valves and a flow restrictor disposed between the check valves. Dry purge air flows into the housing through the flow restrictor, which facilitates smooth and uniform flow of the air, and out of one of the check valves to a dessicant chamber to dry or regenerate dessicant in the chamber. The housing is fitted with flanges or other connection structures for quick, easy and convenient attachment of the housing to a piping network in an air, nitrogen or other process drying system.
Claims20
A double directional valve and flow restriction combination, comprising:
- a housing for receiving a gas;
- an orifice poppet slidably mounted between first and second positions in said housing, said orifice poppet having an air flow orifice for flow of the gas through said orifice poppet;
- a poppet bias mechanism normally biasing said orifice poppet in said first position;
- a taper cone disposed adjacent to said air flow orifice;
- wherein said air flow orifice approaches said taper cone as said orifice poppet moves from said first position toward said second position;
- wherein proximity of said air flow orifice with said taper cone and restriction of flow of the gas through said air flow orifice is directly proportional to pressure of the gas against said orifice poppet;
- a first valve provided in said housing;
- and
- a second valve provided in said housing in spaced-apart relationship to said first valve.
A double directional valve and flow restriction combination, comprising:
- a housing having a first valve arm, a second valve arm and a flow restriction arm between said first valve arm and said second valve arm for receiving a gas;
- an air flow restrictor mechanism provided in said flow restriction arm for varying a flow rate of the gas into said flow restriction arm;
- an elongated valve mount rod provided in said housing;
- first and second valve retainer flanges provided in said housing in spaced-apart relationship to each other;
- first and second valve discs slidably engaging said valve mount rod in spaced-apart relationship to each other;
- a first valve bias mechanism provided on said valve mount rod and normally biasing said first valve disc against said first valve retainer flange;
- and
- a second valve bias mechanism provided on said valve mount rod and normally biasing said second valve disc against said second valve retainer flange.
A double directional valve and flow restriction combination, comprising:
- a housing having a first valve arm, a second valve arm and a flow restriction arm between said first valve arm and said second valve arm for receiving a gas;
- an air flow restrictor mechanism provided in said flow restriction arm for varying a flow rate of the gas into said flow restriction arm;
- a holding block provided in said housing;
- an elongated valve mount rod slidably engaging said holding block;
- first and second valve retainer flanges provided in said housing in spaced-apart relationship to each other;
- first and second valve discs slidably engaging said valve mount rod in spaced-apart relationship to each other;
- a first valve bias mechanism provided on said valve mount rod and normally biasing said first valve disc against said first valve retainer flange;
- a second valve bias mechanism provided on said valve mount rod and normally biasing said second valve disc against said second valve retainer flange;
- first and second retainer discs provided on said valve mount rod;
- and
- first and second spacer springs interposed between said first retainer disc and said holding block and said second retainer disc and said holding block, respectively.
Dependencies are inferred from the claim text.