US4770045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensor
Assignee: Aisin Corp
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Filing: 1987-03-12
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Granted: 1988-09-13
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Expires: 2007-03-12
Abstract
Abstract A pressure sensor converts a fluid pressure into electric signals upon displacement of a diaphragm. The pressure sensor includes a plurality of strain gauges which are formed on a moveable part of the diaphragm with terminal portions formed on a stationary part of the diaphragm. Readout wires are connected to the terminal portions of the strain gauges on the stationary part of the diaphragm.
Inventors
- 👤 Katsumi Nakagawa
- 👤 Takeshi Nakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:01
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A pressure sensor comprising: pressure responding means comprised of a diaphragm having a stationary part and a moveable part adapted to be displaced relative to said stationary part in response to a pressure applied thereto; support means including a first housing adapted to be connected to a pressure source and a second housing adapted to be connected to the atmosphere, said stationary part of said diaphragm being sealing secured between said first and second housings; chamber means defined in said support means by said diaphragm; detecting means connected to said moveable part of said diaphragm to detect displacement thereof upon application of pressure to said moveable part; and terminal means fixed to said stationary part of said diaphragm; wherein said second housing is provided with a plurality of grooves adjacent said diaphragm and said terminal means are comprised of electrical terminals disposed in said grooves.
Claim 2
Dependent Claim
145 words
A pressure sensor comprising: pressure responding means comprised of a diaphragm having a stationary part and a moveable part adapted to be displaced relative to said stationary part in response to a pressure applied thereto; support means including a first housing adapted to be connected to a pressure source and a second housing adapted to be connected to the atmosphere, said stationary part of said diaphragm being sealing secured between said first and second housings; chamber means defined in said support means by said diaphragm; detecting means connected to said moveable part of said diaphragm to detect displacement thereof upon application of pressure to said moveable part; and terminal means fixed to said stationary part of said diaphragm; wherein said second housing is provided with a plurality of grooves adjacent said diaphragm and said terminal means are comprised of electrical terminals disposed in said grooves.
Claim 3
Dependent Claim
40 words
A pressure sensor according to claim 1 wherein said detecting means is comprised of a plurality of strain gauges secured to said moveable part of said diaphragm and electrically connected to said terminals adjacent said stationary part of said diaphragm.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |