US2750792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the bore of tubing
Assignee: Sumitomo Rubber USA LLC
•
Filing: 1953-12-08
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Granted: 1956-06-19
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Morton Geoffrey Fisher
- 👤 Coldfield Sutton
- 👤 Chittleburgh Raymond
- 👤 Powell Ernest Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
G; G01; G01B; G01B13/00; G01B13/08; G01B13/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
APPARATUS FOR MEASURING THE BORE OF A LENGTH OF FLEXIBLE TUBING WHICH COMPRISES, A CONSTANT PRESSURE AIR SUPPLY, A CONNECTION FROM SAID AIR SUPPLY TO SAID TUBING HAVING A CONSTRICTION, A MAGNETISABLE BALL IN SAID TUBING OF LESS DIAMETER THAN THE INTERNAL DIAMETER OF SAID TUBING, AN ELECTRO-MAGNET TO HOLD SAID BALL IN FIXED POSITION RELATIVE TO SAID ELECTRO-MAGNET, MEANS TO MOVE SAID TUBING LENGTHWISE RELATIVE TO SAID ELECTRO-MAGNET AND BALL AND MEANS TO MEASURE VARIATIONS IN PRESSURE OF AIR BETWEEN SAID CONSTRICTION AND SAID BALL.
Claim 2
Dependent Claim
86 words
APPARATUS FOR MEASURING THE BORE OF A LENGTH OF FLEXIBLE TUBING WHICH COMPRISES, A CONSTANT PRESSURE AIR SUPPLY, A CONNECTION FROM SAID AIR SUPPLY TO SAID TUBING HAVING A CONSTRICTION, A MAGNETISABLE BALL IN SAID TUBING OF LESS DIAMETER THAN THE INTERNAL DIAMETER OF SAID TUBING, AN ELECTRO-MAGNET TO HOLD SAID BALL IN FIXED POSITION RELATIVE TO SAID ELECTRO-MAGNET, MEANS TO MOVE SAID TUBING LENGTHWISE RELATIVE TO SAID ELECTRO-MAGNET AND BALL AND MEANS TO MEASURE VARIATIONS IN PRESSURE OF AIR BETWEEN SAID CONSTRICTION AND SAID BALL.
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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) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |