US4625559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducer
Assignee: Individual
•
Filing: 1985-01-14
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Granted: 1986-12-02
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Expires: 2005-01-14
Abstract
Abstract A pressure transducer comprising an elongate hollow outer housing having a pressure sensor diaphragm and externally positioned fixing means which facilitates pressure tight introduction of the diaphragm into a pressure sensing port provided in apparatus capable of generating pressures to be sensed, two elongate members positioned within the outer housing in operative association with the diaphragm so as to move differentially in a direction parallel with the longitudinal axis of the housing consequent upon movement of the diaphragm responsively to a pressure to be sensed, and transducer means responsive to differential movement between the elongate members for producing a signal in dependence upon the pressure sensed.
Inventors
- 👤 Roy E. Carter
- 👤 Francis S. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/04; G01L9/00; G01L9/0041; G01L9/0051; G01L9/006; G01L9/0076
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A pressure transducer comprising an elongate hollow outer housing having a pressure sensor diaphragm and externally positioned fixing means which facilitates pressure tight introduction of the diaphragm into a pressure sensing port provided in apparatus capable of generating pressures to be sensed, two elongate members positioned within the outer housing in operative association with the diaphragm so as to move differentially in a direction parallel with the longitudinal axis of the housing consequent upon movement of the diaphragm responsively to a pressure to be sensed, and transducer means responsive to differential movement between the elongate members for producing a signal in dependence upon the pressure sensed.
Claim 2
Dependent Claim
106 words
A pressure transducer comprising an elongate hollow outer housing having a pressure sensor diaphragm and externally positioned fixing means which facilitates pressure tight introduction of the diaphragm into a pressure sensing port provided in apparatus capable of generating pressures to be sensed, two elongate members positioned within the outer housing in operative association with the diaphragm so as to move differentially in a direction parallel with the longitudinal axis of the housing consequent upon movement of the diaphragm responsively to a pressure to be sensed, and transducer means responsive to differential movement between the elongate members for producing a signal in dependence upon the pressure sensed.
Claim 3
Dependent Claim
21 words
A pressure transducer according to claim 1 in which the externally positioned fixing means is an externally positioned screw threaded portion.
Claim 4
Dependent Claim
25 words
A pressure transducer according to claim 1 in which the transducer means is arranged to produce an electrical signal in dependence upon the pressure sensed.
Claim 5
Dependent Claim
18 words
A pressure transducer according to claim 1 in which the elongate members are of substantially the same length.
Claim 6
Dependent Claim
18 words
A pressure transducer according to claim 1 in which the elongate members comprise two coaxially arranged tubular members.
Claim 7
Dependent Claim
61 words
A pressure transducer according to claim 5 in which the inner tubular member is arranged in contact with the centre of the diaphragm, and in which the outer tubular member is arranged in contact with an end part of the housing adjacent the diaphragm, the ends of the two tubular members remote from the diaphragm being coupled to the transducer means.
Claim 8
Dependent Claim
35 words
A pressure transducer according to claim 6 in which the transducer means comprises a strain gauge element which is arranged to be responsive to differential movement between the elongate members to produce an electrical signal.
Claim 9
Dependent Claim
34 words
A pressure transducer according to claim 6 in which the transducer means comprises a piezo-electric device which is arranged to be responsive to differential movement between the elongate members to produce an electrical signal.
Claim 10
Dependent Claim
39 words
A pressure transducer according to claim 1 in which the transducer means comprises an optical detector arrangement responsive to differential movement between the elongate members, the optical detector arrangement including photo-detectors for enabling the production of an electrical signal.
Claim 11
Dependent Claim
48 words
A pressure transducer according to claim 9 in which the two elongate members each have a graticule secured thereto, illumination means being provided such that light shines through the graticules onto the photo-detectors whereby the electrical signal is produced consequent upon differential movement between the two elongate members.
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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |