Patent US3227031A successfully refreshed from Google Patents.
US3227031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bolt anchor assembly
Assignee: Individual
•
Filing: 1962-07-05
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Granted: 1966-01-04
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Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Chester I Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:45
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F16B13/06; F16B13/063; F16B13/066; F16B13/068; E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122; E04C5/125; E21; E21D; E21D21/00; E21D21/008
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
AN ANCHORING DEVICE FOR A ROCK BOLT ASSEMBLY HAVING A THREADED END-PORTION, SAID DEVICE COMPRISING: A CONE MEMBER HAVING A THREADED BORE NORMALLY ENGAGING SAID THREADED END-PORTION, AND A CONICAL PERIPHERAL SURFACE COAXIAL WITH SAID BORE; AN EXPANSIBLE SHELL MEMBER SURROUNDING SAID CONE MEMBER; AND A THRUST MEMBER AXIALLY FIXED WITH RESPECT TO SAID ENDPORTION, SAID SHELL MEMBER BEING AXIALLY INTERPOSED BETWEEN SAID THRUST MEMBER AND CONE MEMBER, SAID THRUST MEMBER INCLUDING A RING HAVING THREADED ENGAGEMENT WITH SAID THREADED END PORTION AT THE LIMIT OF THE THREADING THEREOF; AND THRUST TRANSFER MEANS INCLUDING A SOLID CONICAL WASHER INTERPOSED BETWEEN SAID THRUST MEMBER AND SAID SHELL MEMBER, WITH THE SMALLER END OF SAID WASHER ENGAGING SAID THRUST MEMBER.
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |