Patent US2116300A successfully refreshed from Google Patents.
Patent US3139800A successfully refreshed from Google Patents.
US3139800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for milling cutters and like rotary tools
Assignee: Clarkson Engineers Ltd
•
Filing: 1961-11-09
•
Granted: 1964-07-07
•
Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 Clarkson Frank Henry
- 👤 John B Clarkson
- 👤 Horton Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/26; Y; Y10; Y10T; Y10T279/00; Y10T279/16; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1934; Y10T407/1936; Y10T409/00; Y10T409/30; Y10T409/30952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A TOOL HOLDER FOR ROTARY TOOLS OF THE CHARACTER DESCRIBED COMPRISING A BODY HAVING A MOUNTING SHANK AND AN AXIAL BORE OPEN AT THE LEADING END OF SAID BODY, SAID LEADING END BEING FORMED FOR SPIGOTTED ENGAGEMENT WITH A ROTARY TOOL; A CO-AXIAL MEMBER HAVING A SCREW ENGAGEMENT OF NON-LOCKING HELIX ANGLE IN SAID AXIAL BORE OF THE HOLDER BODY AND HAVING A PAIR OF ADJACENT SIDE ABUTMENT FACES DISPOSED WITHIN SAID BORE WHILST A FORWARD PROTRUDING PORTION OF SAID CO-AXIAL MEMBER IS THREADED FOR RECEIVING A ROTARY TOOL IN NORMAL SCREW THREADED ENGAGEMENT THEREON AND IN SPIGOTTED ENGAGEMENT ABOUT AND AGAINST THE FORWARD END OF THE HOLDER BODY, SAID NON-LOCKING SCREW ENGAGEMENT OF THE CO-AXIAL MEMBER IN THE HOLDER BODY PERMITTING UNSCREWING OF THE CO-AXIAL MEMBER FOR FREEING A ROTARY TOOL THAT HAS BECOME TIGHTLY SCREWED ON SAID CO-AXIAL MEMBER
Claim 2
Dependent Claim
141 words
A TOOL HOLDER FOR ROTARY TOOLS OF THE CHARACTER DESCRIBED COMPRISING A BODY HAVING A MOUNTING SHANK AND AN AXIAL BORE OPEN AT THE LEADING END OF SAID BODY, SAID LEADING END BEING FORMED FOR SPIGOTTED ENGAGEMENT WITH A ROTARY TOOL; A CO-AXIAL MEMBER HAVING A SCREW ENGAGEMENT OF NON-LOCKING HELIX ANGLE IN SAID AXIAL BORE OF THE HOLDER BODY AND HAVING A PAIR OF ADJACENT SIDE ABUTMENT FACES DISPOSED WITHIN SAID BORE WHILST A FORWARD PROTRUDING PORTION OF SAID CO-AXIAL MEMBER IS THREADED FOR RECEIVING A ROTARY TOOL IN NORMAL SCREW THREADED ENGAGEMENT THEREON AND IN SPIGOTTED ENGAGEMENT ABOUT AND AGAINST THE FORWARD END OF THE HOLDER BODY, SAID NON-LOCKING SCREW ENGAGEMENT OF THE CO-AXIAL MEMBER IN THE HOLDER BODY PERMITTING UNSCREWING OF THE CO-AXIAL MEMBER FOR FREEING A ROTARY TOOL THAT HAS BECOME TIGHTLY SCREWED ON SAID CO-AXIAL MEMBER
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |