US3115348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive drive for rotatable tools
Assignee: National Automatic Tool Co Inc
•
Filing: 1961-02-10
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Granted: 1963-12-24
•
Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Lowell B Penland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:43
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23B31/261; B23B31/265; B23B31/008; Y; Y10; Y10S; Y10S279/00; Y10S279/90; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17162; Y10T279/17411; Y10T279/17529; Y10T408/00; Y10T408/94; Y10T408/95; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408; Y10T409/309464
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A MACHINE TOOL, A HOLLOW ROTATABLE SPINDLE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED RADIAL OPENINGS, A PLURALITY OF KEYS RECIPROCABLY MOUNTED IN THE OPENINGS, A SPLIT SOCKET-LIKE COLLET MOUNTED WITHIN THE SPINDLE, A TOOL HOLDER REMOVABLY MOUNTED IN THE SOCKET OF SAID COLLET FOR TIGHT FRICTIONAL ENGAGEMENT THEREWITH, THE TOOL HOLDER HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED TEETH DIFFERING IN NUMBER BY ONE FROM THE NUMBER OF KEYS AND POSITIONED OPPOSITE THE KEYS IN THE OPERATING POSITION OF THE TOOL HOLDER IN THE COLLET FOR RECEIPT OF AT LEAST ONE KEY BETWEEN ADJACENT TEETH IN ALL ANGULAR POSITIONS OF THE TOOL HOLDER IN THE SPINDLE, AND MEANS URGING THE KEYS TOWARD THE TOOL HOLDER FOR A POSITIVE DRIVE CONNECTION BETWEEN THE SPINDLE AND TOOL HOLDER IN EITHER DIRECTION OF SPINDLE ROTATION.
Claim 2
Dependent Claim
132 words
IN A MACHINE TOOL, A HOLLOW ROTATABLE SPINDLE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED RADIAL OPENINGS, A PLURALITY OF KEYS RECIPROCABLY MOUNTED IN THE OPENINGS, A SPLIT SOCKET-LIKE COLLET MOUNTED WITHIN THE SPINDLE, A TOOL HOLDER REMOVABLY MOUNTED IN THE SOCKET OF SAID COLLET FOR TIGHT FRICTIONAL ENGAGEMENT THEREWITH, THE TOOL HOLDER HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED TEETH DIFFERING IN NUMBER BY ONE FROM THE NUMBER OF KEYS AND POSITIONED OPPOSITE THE KEYS IN THE OPERATING POSITION OF THE TOOL HOLDER IN THE COLLET FOR RECEIPT OF AT LEAST ONE KEY BETWEEN ADJACENT TEETH IN ALL ANGULAR POSITIONS OF THE TOOL HOLDER IN THE SPINDLE, AND MEANS URGING THE KEYS TOWARD THE TOOL HOLDER FOR A POSITIVE DRIVE CONNECTION BETWEEN THE SPINDLE AND TOOL HOLDER IN EITHER DIRECTION OF SPINDLE ROTATION.
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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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |