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US3312487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tower locking dogs
Assignee: Oil States Industries Inc
•
Filing: 1964-06-15
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Granted: 1967-04-04
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/34; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/59; Y10T403/591; Y10T403/593
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A LOGGING TOWER COMPRISING A TUBULAR UPPER SECTION TELESCOPICALLY ADJUSTABLE INTO AND FROM A TUBULAR LOWER SECTION; SAID UPPER SECTION HAVING A DOWNWARDLY FACING ENCIRCLING SHOULDER EMBODIED IN ITS LOWER END PORTION AS CONTAINED IN THE LOWER TOWER SECTION, A PLURALITY OF LOCKING DOGS PIVOTALLY MOUNTED IN THE SURROUNDING WALL OF THE LOWER SECTION, MEANS FOR SWINGING SAID LOCKING DOGS INWARDLY TO HOLDINGLY ENGAGE WITH THE ENCIRCLING SHOULDER OF THE UPPER SECTION, WHEN EXTENDED, TO SUPPORT IT IN USE AND MEANS FOR DISENGAGING SAID DOGS FROM THE SHOULDER TO PERMIT THE UPPER SECTION TO BE TELESCOPED INTO THE LOWER SECTION FROM ITS EXTENDED POSITION OF USE.
Claim 2
Dependent Claim
107 words
IN A LOGGING TOWER COMPRISING A TUBULAR UPPER SECTION TELESCOPICALLY ADJUSTABLE INTO AND FROM A TUBULAR LOWER SECTION; SAID UPPER SECTION HAVING A DOWNWARDLY FACING ENCIRCLING SHOULDER EMBODIED IN ITS LOWER END PORTION AS CONTAINED IN THE LOWER TOWER SECTION, A PLURALITY OF LOCKING DOGS PIVOTALLY MOUNTED IN THE SURROUNDING WALL OF THE LOWER SECTION, MEANS FOR SWINGING SAID LOCKING DOGS INWARDLY TO HOLDINGLY ENGAGE WITH THE ENCIRCLING SHOULDER OF THE UPPER SECTION, WHEN EXTENDED, TO SUPPORT IT IN USE AND MEANS FOR DISENGAGING SAID DOGS FROM THE SHOULDER TO PERMIT THE UPPER SECTION TO BE TELESCOPED INTO THE LOWER SECTION FROM ITS EXTENDED POSITION OF USE.
References Cited (Backward Citations)
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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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |