US3683137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure switch diaphragm assembly with clamping diaphragm sealing means
Assignee: Individual
•
Filing: 1970-09-28
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Granted: 1972-08-08
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Expires: 1990-09-28
Abstract
Abstract A pressure switch assembly in which the switch is actuated by a pressure responsive diaphragm which is held in assembled relation with the diaphragm bowl by a resilient seal ring and by a cap which is fastened to the switch base, the peripheries of the diaphragm and its bowl being sealingly engaged under the clamping force which deforms the seal ring, without a bond between or at the peripheries of the diaphragm and its bowl. Such a pressure switch assembly in which the resilient seal ring backs up the diaphragm in the region of its outermost undulation where maximum stress occurs.
Inventors
- 👤 Marshall A Stiltner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:31
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
In a pressure switch assembly comprising: a switch base having an opening, switch means, switch supporting means mounting said switch means in said opening, a pressure capsule including a flexible metal diaphragm and a metal bowl mounted on said base, said diaphragm having a portion operatively engageable with said switch means in said opening to actuate said switch means responsive to a change in pressure in said capsule, and a pressure fitting leading through said bowl into said capsule; the improvement wherein said base has an annular surface, said diaphragm and said bowl having complemental flat annular marginal sealing portions disposed in face-to-face sealing engagement and aligned with the annular surface of said base, a clamping member having an annular clamping surface engaging the marginal portion of said bowl to force said marginal portions of said bowl and said diaphragm towards said surface of said base, and a resiliently deformable ring interposed between said marginal portion of said diaphragm and said surface of said base to resiliently maintain said marginal portions of said diaphragm and said bowl in sealing contact.
Claim 2
Dependent Claim
180 words
In a pressure switch assembly comprising: a switch base having an opening, switch means, switch supporting means mounting said switch means in said opening, a pressure capsule including a flexible metal diaphragm and a metal bowl mounted on said base, said diaphragm having a portion operatively engageable with said switch means in said opening to actuate said switch means responsive to a change in pressure in said capsule, and a pressure fitting leading through said bowl into said capsule; the improvement wherein said base has an annular surface, said diaphragm and said bowl having complemental flat annular marginal sealing portions disposed in face-to-face sealing engagement and aligned with the annular surface of said base, a clamping member having an annular clamping surface engaging the marginal portion of said bowl to force said marginal portions of said bowl and said diaphragm towards said surface of said base, and a resiliently deformable ring interposed between said marginal portion of said diaphragm and said surface of said base to resiliently maintain said marginal portions of said diaphragm and said bowl in sealing contact.
Claim 3
Dependent Claim
41 words
A pressure switch assembly as defined in claim 1, wherein said diaphragm has an annular undulation adjacent to its marginal sealing portion, and said resiliently deformable ring contacts said diaphragm adjacent to said undulation and resiliently resists flexure of said diaphragm.
Claim 4
Dependent Claim
76 words
A pressure switch assembly as defined in claim 1, wherein one of said diaphragm and said bowl has an annular and axially flanged periphery providing an axially opening peripheral channel adjacent to its marginal portion, and the other of said diaphragm and said bowl has an annular axially projecting peripheral flange adjacent to its marginal portion and disposed in said channel, said flanged periphery contacting one of said annular surfaces to limit deformation of said ring.
Claim 5
Dependent Claim
63 words
A pressure switch as defined in claim 1, wherein said pressure fitting is connected to said bowl, said bowl having a central opening, said fitting having an annular end flange turned back in said opening into opposing relation to the inner surface of said bowl, and a seal ring underlying said turned back flange in sealing engagement therewith and with said bowl surface.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |