US3590859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion valve
Assignee: Individual
•
Filing: 1969-02-14
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Granted: 1971-07-06
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Expires: 1989-02-14
Abstract
Abstract An expansion valve for controlling the flow of a fluid medium and being connected to a pressure-generating sensor has a valve housing defining a valve chamber and a valve head with a membrane therein reacting to the pressure coming from said sensor. A valve pin, connecting the membrane with the valve body of the valve for joint movement therewith, has a bore connecting the outlet end of the valve with an inner membrane chamber. The valve pin passes through a packing located between the inner membrane chamber and the valve chamber for preventing a flow of the medium from the valve chamber into the inner membrane chamber.
Inventors
- 👤 Rudibert Gotzenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:46
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1266; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
285 words
An expansion valve comprising a valve housing having an inlet branch and an outlet branch said inlet branch including an elongated valve chamber; a valve head defining a membrane chamber therein; a membrane located in said membrane chamber and dividing said chamber into an outer and an inner membrane chamber, said outer and said inner membrane chambers being pressuretight relative to each other, said outer membrane chamber being arranged for connection to means for applying pressure to said outer membrane chamber; a valve body and a valve seat located on one end of said elongated valve chamber remote from said valve head, said valve body being movable between an open and a closed position with regard to said valve seat; a valve pin firmly connected on one end to said valve body, extending through said elongated valve chamber, and arranged at the other end to be engaged by said membrane for transmitting movement of the membrane to said valve body, said valve pin having a narrow bore axially therethrough and said valve body having a bore connecting to said bore of said valve pin; a packing located on the other end of said elongated valve chamber close to said inner membrane chamber for preventing a flow of the medium from said valve chamber into said membrane chamber, said packing receiving said valve pin for slidable movement therein; and adjustable spring means located inside of said valve housing for urging said valve body in a direction opposite to the direction of the movement of said membrane in response to the pressure applied to said outer chamber, said bore in said valve pin and in said valve body connecting said inner membrane chamber with said outlet branch.
Claim 2
Dependent Claim
285 words
An expansion valve comprising a valve housing having an inlet branch and an outlet branch said inlet branch including an elongated valve chamber; a valve head defining a membrane chamber therein; a membrane located in said membrane chamber and dividing said chamber into an outer and an inner membrane chamber, said outer and said inner membrane chambers being pressuretight relative to each other, said outer membrane chamber being arranged for connection to means for applying pressure to said outer membrane chamber; a valve body and a valve seat located on one end of said elongated valve chamber remote from said valve head, said valve body being movable between an open and a closed position with regard to said valve seat; a valve pin firmly connected on one end to said valve body, extending through said elongated valve chamber, and arranged at the other end to be engaged by said membrane for transmitting movement of the membrane to said valve body, said valve pin having a narrow bore axially therethrough and said valve body having a bore connecting to said bore of said valve pin; a packing located on the other end of said elongated valve chamber close to said inner membrane chamber for preventing a flow of the medium from said valve chamber into said membrane chamber, said packing receiving said valve pin for slidable movement therein; and adjustable spring means located inside of said valve housing for urging said valve body in a direction opposite to the direction of the movement of said membrane in response to the pressure applied to said outer chamber, said bore in said valve pin and in said valve body connecting said inner membrane chamber with said outlet branch.
Claim 3
Dependent Claim
48 words
An expansion valve as set forth in claim 1 wherein said inlet branch and said outlet branch have axes parallel to each other and wherein and the axes of the valve chamber and the valve pin are normal to the axes of said inlet and said outlet branches.
Claim 4
Dependent Claim
39 words
An expansion valve as set forth in claim 1, wherein the valve chamber is so arranged that the fluid medium flowing from the inlet branch into said valve chamber is in contact with said valve pin, for thermal transfer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |