US3077958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero thermal expansion device
Assignee: RTX Corp
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Filing: 1961-09-05
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Granted: 1963-02-19
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles F Grimsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:36
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/024; Y; Y10; Y10T; Y10T74/00; Y10T74/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A ZERO-EXPANSION ACTUATING MEMBER COMPRISING A PLURALITY OF PARALLEL AXIALLY SPACED DISCS HAVING ONE COEFFICIENT OF THERMAL EXPANSION AND A PLURALITY OF RODS BETWEEN EACH PAIR OF DISCS HAVING THEIR ENDS PIVOTALLY ASSOCIATED WITH CONFRONTING SURFACES OF SAID DISCS, SAID RODS HAVING A DIFFERENT COEFFICIENT OF THERMAL EXPANSION FROM SAID DISCS, SAID RODS HAVING THEIR AXES INCLINED WITH RESPECT TO THE LONGITUDINAL AXIS EXTENDING THROUGH SAID DISCS, SAID COEFFICIENTS BEING SO CHOSEN THAT THE EXPANSION OF SAID DISCS IN THE PLANE OF THE LATTER COMPENSATES FOR THE EXPANSION OF SAID RODS ALONG THEIR LENGTHS.
Claim 2
Dependent Claim
94 words
A ZERO-EXPANSION ACTUATING MEMBER COMPRISING A PLURALITY OF PARALLEL AXIALLY SPACED DISCS HAVING ONE COEFFICIENT OF THERMAL EXPANSION AND A PLURALITY OF RODS BETWEEN EACH PAIR OF DISCS HAVING THEIR ENDS PIVOTALLY ASSOCIATED WITH CONFRONTING SURFACES OF SAID DISCS, SAID RODS HAVING A DIFFERENT COEFFICIENT OF THERMAL EXPANSION FROM SAID DISCS, SAID RODS HAVING THEIR AXES INCLINED WITH RESPECT TO THE LONGITUDINAL AXIS EXTENDING THROUGH SAID DISCS, SAID COEFFICIENTS BEING SO CHOSEN THAT THE EXPANSION OF SAID DISCS IN THE PLANE OF THE LATTER COMPENSATES FOR THE EXPANSION OF SAID RODS ALONG THEIR LENGTHS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |