US3664237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensor
Assignee: Sundstrand Data Control Inc
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Filing: 1970-01-21
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Granted: 1972-05-23
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Expires: 1990-01-21
Abstract
Abstract Disclosed is a pressure sensor containing: (1) a mechanical assembly, consisting of a bellows-pivot arrangement such as to yield a torque about a single sensitive axis wherein pressure is applied to the bellows, and (2) the appropriate electronics, consisting of a detection device to sense angular motion and a torquing device to restore the mechanical assembly to its null position. The amount of electrically generated torque necessary to balance the pressure induced torque is proportional to and a measure of the applied pressure.
Inventors
- 👤 Jerome M Paros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02; G01L13/023; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/34; G01L11/00; G01L11/004; G01L11/008; G01L19/00; G01L19/04; G01L9/00; G01L9/0033; G01L9/0038
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
A pressure sensor comprising first and second bellows each having a closed end and at least one having an open end, a metal bar spaced from but positioned between said bellows with its longitudinal axis substantially parallel to the longitudinal axis of each of said bellows, a rigid plate joining said closed ends of said bellows to one end of said bar, means rigidly mounting the other end of said bar and the ends of said bellows remote from said closed ends, saiD bar having a necked down portion intermediate its ends defining a pivot axis perpendicular to the plane containing said longitudinal axes, said bar having material added to said necked down portion to displace said pivot axis from the midpoint between said bellows to compensate for differences in bellows pressure sensitivity, said midpoint being displaced toward the bellows of greater pressure sensitivity, whereby when a pressure fluid is introduced into one of said bellows a torque and resultant deflection of both said bellows and said bar is produced about said pivot axis representative of the differential pressure between said bellows.
Claim 2
Dependent Claim
182 words
A pressure sensor comprising first and second bellows each having a closed end and at least one having an open end, a metal bar spaced from but positioned between said bellows with its longitudinal axis substantially parallel to the longitudinal axis of each of said bellows, a rigid plate joining said closed ends of said bellows to one end of said bar, means rigidly mounting the other end of said bar and the ends of said bellows remote from said closed ends, saiD bar having a necked down portion intermediate its ends defining a pivot axis perpendicular to the plane containing said longitudinal axes, said bar having material added to said necked down portion to displace said pivot axis from the midpoint between said bellows to compensate for differences in bellows pressure sensitivity, said midpoint being displaced toward the bellows of greater pressure sensitivity, whereby when a pressure fluid is introduced into one of said bellows a torque and resultant deflection of both said bellows and said bar is produced about said pivot axis representative of the differential pressure between said bellows.
Claim 3
Dependent Claim
181 words
A pressure sensor comprising first and second bellows having a closed end and at least one having an open end, a metal bar spaced from but positioned between said bellows with its longitudinal axis substantially parallel to the longitudinal axis of each of said bellows, a rigid plate joining said closed ends of said bellows to one end of said bar, means rigidly mounting the other end of said bar and the ends of said bellows remote from said closed ends, said bar having a necked down portion intermediate its ends defining a pivot axis perpendicular to the plane containing said longitudinal axes, said bar having material removed from said necked down portion to displace said pivot axis from the midpoint between said bellows to compensate for differences in bellows pressure sensitivity, said midpoint being displaced towards the bellows of greater pressure sensitivity, whereby when a pressure fluid is introduced into one of said bellows a torque and resultant deflection of both said bellows and said bar is produced about said pivot axis representative of the differential pressure between said bellows.
Claim 4
Dependent Claim
181 words
A pressure sensor comprising first and second bellows having a closed end and at least one having an open end, a metal bar spaced from but positioned between said bellows with its longitudinal axis substantially parallel to the longitudinal axis of each of said bellows, a rigid plate joining said closed ends of said bellows to one end of said bar, means rigidly mounting the other end of said bar and the ends of said bellows remote from said closed ends, said bar having a necked down portion intermediate its ends defining a pivot axis perpendicular to the plane containing said longitudinal axes, said bar having material removed from said necked down portion to displace said pivot axis from the midpoint between said bellows to compensate for differences in bellows pressure sensitivity, said midpoint being displaced towards the bellows of greater pressure sensitivity, whereby when a pressure fluid is introduced into one of said bellows a torque and resultant deflection of both said bellows and said bar is produced about said pivot axis representative of the differential pressure between said bellows.
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |