US3561121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance measurement with friction wheel devices
Assignee: Primus Manufacturing Inc
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Filing: 1969-04-07
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Granted: 1971-02-09
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Expires: 1989-04-07
Abstract
Abstract THE PERIPHERY OF THE METERING WHEEL OF A FRICTION WHEEL DISTANCE MEASURING DEVICE HAS A PARTI-SPHERICAL CONFIGURATION AND HAS ITS MAXIMUM DIAMETER MORE PROXIMATE TO ONE END FACE OF THE WHEEL THAN TO THE OTHER END FACE TO ENABLE DISPOSITION OF THE WHEEL TO COMPENSATE FOR MEASUREMENT ERRORS PRODUCED BY METAL ELASTIC CRAWL IN A MEASUREMENT SURFACE ENGAGED BY THE WHEEL AND TO COMPENSATE FOR REPEATABILITY ERRORS PRODUCED BY NONRECIPROCAL DEFLECTIONS IN STRUCTURE TO WHICH THE DEVICE IS MOUNTED IN USE.
Inventors
- 👤 Irven H Culver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/12
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |