US4311272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic controlled steam trap
Assignee: Gestra AG
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Filing: 1980-08-07
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Granted: 1982-01-19
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Expires: 2000-08-07
Abstract
Abstract A steam trap has a bimetallic control element provided on the prepressure side and a locking part which is biased by the prepressure in the opening direction and which is actuated by the bimetallic control element. The bimetallic control element is provided with at least one bimetallic snap disk and the valve seat is stroke-movably positioned, whereby the maximum stroke path of the valve seat is only a part of the operating stroke of the locking part.
Inventors
- 👤 Werner Foller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:47
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/02; F16T1/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
In a steam trap of the type including a housing having a separating wall in which is formed a lead aperture for establishing communication between the prepressure and low pressure sides thereof, a bimetallic control element mounted on said prepressure side, a valve seat, and a stroke-movable locking part disposed for cooperation with said valve seat which is biased in the opening direction and is actuated by said bimetallic control element, the improvement comprising: said bimetallic control element including at least one bimetallic snap disk and said valve seat being provided on a stroke-movable element which is disposed for limited movement generally along a portion of the stroke of said locking part such that the maximum stroke path of said valve seat is only a part of the operating stoke of the locking part.
Claim 2
Dependent Claim
134 words
In a steam trap of the type including a housing having a separating wall in which is formed a lead aperture for establishing communication between the prepressure and low pressure sides thereof, a bimetallic control element mounted on said prepressure side, a valve seat, and a stroke-movable locking part disposed for cooperation with said valve seat which is biased in the opening direction and is actuated by said bimetallic control element, the improvement comprising: said bimetallic control element including at least one bimetallic snap disk and said valve seat being provided on a stroke-movable element which is disposed for limited movement generally along a portion of the stroke of said locking part such that the maximum stroke path of said valve seat is only a part of the operating stoke of the locking part.
Claim 3
Dependent Claim
59 words
The steam trap according to claim 1, additionally including two spaced-apart stroke abutments, wherein said valve seat is provided on an annular element which is disposed between said two stroke abutments for free axial movement, wherein said control element has a base portion circumferentially surrounding said annular element and wherein sealing means is provided coupled to said annular element.
Claim 4
Dependent Claim
40 words
The steam trap according to claim 2, wherein an annular membrane serves as said sealing means, said membrane having an inner edge which is tightly coupled with said annular element and an outer edge tightly coupled with said base portion.
Claim 5
Dependent Claim
36 words
The steam trap according to claim 1, wherein one of said stroke abutments is provided on said base portion and wherein the other of said stroke abutments is provided on said separating wall of said housing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |