Patent US3232116A successfully refreshed from Google Patents.
US3232116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bourdon spiral assembly
Assignee: Robertshaw Controls Co
•
Filing: 1962-08-06
•
Granted: 1966-02-01
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Charles H Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/04; G01L7/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A BOURDON TUBE FOR INSTRUMENT GAGES AND THE LIKE COMPRISING A TUBE HAVING A FLAT OVAL CONFIGURATION IN CROSSSECTION, THE FLAT WALL PORTIONS OF THE TUBE HAVING OPPOSED INNER SURFACES EXTENDING PARALLEL TO THE MAJOR AXIS OF THE OVAL, A SEAM WELD AT ONE END OF THE TUBE JOINING THE CENTRAL PORTIONS OF THE OPPOSED INNER SURFACES OF THE FLAT WALL PORTIONS TO THEREBY REINFORCE SAID ONE END OF THE TUBE, AND MEANS SEALING THE OPPOSITE END OF THE TUBE.
Claim 2
Dependent Claim
80 words
A BOURDON TUBE FOR INSTRUMENT GAGES AND THE LIKE COMPRISING A TUBE HAVING A FLAT OVAL CONFIGURATION IN CROSSSECTION, THE FLAT WALL PORTIONS OF THE TUBE HAVING OPPOSED INNER SURFACES EXTENDING PARALLEL TO THE MAJOR AXIS OF THE OVAL, A SEAM WELD AT ONE END OF THE TUBE JOINING THE CENTRAL PORTIONS OF THE OPPOSED INNER SURFACES OF THE FLAT WALL PORTIONS TO THEREBY REINFORCE SAID ONE END OF THE TUBE, AND MEANS SEALING THE OPPOSITE END OF THE TUBE.
References Cited (Backward Citations)
US745636A
Cited
US1521343A
Cited
US1345630A
Cited
US1714989A
Cited
US1714988A
Cited
US2478031A
Cited
US2477242A
Cited
US2495314A
Cited
DE838657C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |