US3603153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-acting pressure and vacuum sensor
Assignee: Individual
•
Filing: 1970-01-02
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Granted: 1971-09-07
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Expires: 1990-01-02
Abstract
Abstract A direct-acting pressure and vacuum sensor operable in the lowpressure range and constituted by two cantilever springs having different lengths and spring rates. The two springs have a similar C-formation and are maintained one within the other, in spaced relation, both springs have being attached at one end to a socket. The free ends of the springs terminate in a cap from which a pointer is extended. The springs are sealed within a flexible envelope to define an internal chamber communicating with the socket, whereby pressure applied thereto causes the springs to deflect, thereby moving the pointer to indicate pressure.
Inventors
- 👤 Siegfried H A Schmaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:26
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/04; G01L7/041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A direct-acting pressure sensor comprising: A. first and second cantilever flat springs having different lengths and thicknesses, said springs having similar Cformations and being maintained in spaced relation, the shorter being disposed within the longer, B. a flexible envelope surrounding said springs and sealing same to define a pressure chamber between the springs, C. a fixed socket attached to one end of said springs, said socket having a coupling head communicating with said chamber, and D. means secured to the free end of said springs to indicate the deflection thereof as a result of pressure applied to said chamber.
Claim 2
Dependent Claim
99 words
A direct-acting pressure sensor comprising: A. first and second cantilever flat springs having different lengths and thicknesses, said springs having similar Cformations and being maintained in spaced relation, the shorter being disposed within the longer, B. a flexible envelope surrounding said springs and sealing same to define a pressure chamber between the springs, C. a fixed socket attached to one end of said springs, said socket having a coupling head communicating with said chamber, and D. means secured to the free end of said springs to indicate the deflection thereof as a result of pressure applied to said chamber.
Claim 3
Dependent Claim
21 words
A sensor as set forth in claim 1, wherein said springs are joined together at the free end by a washer.
Claim 4
Dependent Claim
21 words
A sensor as set forth in claim 1, wherein the outer spring is extended to provide pointer means to indicate deflection.
Claim 5
Dependent Claim
27 words
A sensor as set forth in claim 1, wherein the inner spring has an extension which is adjustable in position relative to said socket to facilitate calibration.
Claim 6
Dependent Claim
16 words
A sensor as set forth in claim 1, wherein said envelope is of an elastomer material.
References Cited (Backward Citations)
US1421501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |