US3697919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor pressure transducer structure
Assignee: General Electric Co
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Filing: 1971-08-03
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Granted: 1972-10-10
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Expires: 1991-08-03
Abstract
Abstract The pressure-sensitive diaphragm assembly is mounted in and sealed to the transducer housing by a wedge-shaped seal which is continuously forced into a wedging and sealing position by pressure of fluid in the transducer housing.
Inventors
- 👤 Edward D Orth
- 👤 Alvan A Kessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:58
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/14; G01L19/142; G01L19/143; G01L19/0007; G01L19/003; G01L19/0038; G01L19/06; G01L19/0627; G01L19/0645
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
A pressure transducer comprising: a. a housing having first and second mating parts, the first housing part having interior walls defining a fluid chamber adapted to be subjected to a fluid under pressure and the second housing part having tapered interior walls defining a mounting socket opening into the fluid chamber; b. a transducer assembly comprising an elongated support member and a strain-sensitive diaphragm mounted one one end of the support member; c. means mounting the transducer assembly on the housing so that the other end of the diaphragm support member is supported in the mounting socket of the second housing part with the side portions adjacent said other end defining with the tapered walls a seal cavity and with the diaphragm end and adjacent side portions projecting into the fluid chamber of the first housing part in spaced relation with the interior walls thereof when the two housing parts are assembled in mating relation; and d. a wedge-shaped seal disposed in the seal cavity, said seal being wedged into sealing contact with side walls of the diaphragm support member and the tapered socket walls by the action of pressure in the fluid chamber.
Claim 2
Dependent Claim
194 words
A pressure transducer comprising: a. a housing having first and second mating parts, the first housing part having interior walls defining a fluid chamber adapted to be subjected to a fluid under pressure and the second housing part having tapered interior walls defining a mounting socket opening into the fluid chamber; b. a transducer assembly comprising an elongated support member and a strain-sensitive diaphragm mounted one one end of the support member; c. means mounting the transducer assembly on the housing so that the other end of the diaphragm support member is supported in the mounting socket of the second housing part with the side portions adjacent said other end defining with the tapered walls a seal cavity and with the diaphragm end and adjacent side portions projecting into the fluid chamber of the first housing part in spaced relation with the interior walls thereof when the two housing parts are assembled in mating relation; and d. a wedge-shaped seal disposed in the seal cavity, said seal being wedged into sealing contact with side walls of the diaphragm support member and the tapered socket walls by the action of pressure in the fluid chamber.
Claim 3
Dependent Claim
59 words
The pressure transducer of claim 1 including a flexible isolating diaphragm mounted on the first housing part so as to enclose the fluid chamber, and a fill liquid completely filling the fluid chamber so that pressure exerted on the fill liquid by the isolating diaphragm is transmitted through the liquid to the strain gage diaphragm and to the seal.
Claim 4
Dependent Claim
22 words
The pressure transducer of claim 1 wherein the diaphragm support member s formed of glass and the seal is an epoxy resin.
Claim 5
Dependent Claim
29 words
The pressure transducer of claim 2 wherein the diAphragm support member is formed of glass, the seal is an epoxy resin and the fill fluid is a silicone oil.
Claim 6
Dependent Claim
33 words
The pressure transducer of claim 2 wherein the diaphragm support member has an axial bore forming a passageway leading outside the housing and the diaphragm has an active area which overlies the bore.
Claim 7
Dependent Claim
30 words
The pressure transducer of claim 5 wherein the strain-sensitive diaphragm is a piezoresistive type having integral resistance elements connected to electrical conductors extending outside the housing through the axial bore.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |