Patent US1480617A successfully refreshed from Google Patents.
US3676120A
Expired / Lapsed
US
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Side operated drawbolt for tool-carrying spindle
Assignee: BRIDGEPORT MACHINES Inc A CORP OF
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Filing: 1971-02-26
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Granted: 1972-07-11
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Expires: 1991-02-26
Abstract
Abstract A simplified drawbar means for eliminating the use of the long drawbar unit extending through the spindle and providing a side actuated device for turning a tool mounting bolt in the spindle by means of a universal joint. The device which is extremely simple and can be easily assembled is contained in the end of the spindle near the work so that it is readily available for actuation. It is particularly useful in machine tools having a vertically disposed spindle since it provides a short drawbar with a side actuator therefor which is conveniently located adjacent the tool-carrying end of the spindle for drawing the tool carrier into position.
Inventors
- 👤 Leonard Nelson
- 👤 Thomas Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:06
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23B31/261; B23B31/266; B23Q; B23Q11/00; Y; Y10; Y10T; Y10T408/00; Y10T408/94; Y10T408/95; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408; Y10T409/309464
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |