Patent US3216294A successfully refreshed from Google Patents.
US3216294A
Expired / Lapsed
US
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High speed bar turning machines
Assignee: Sir James Farmer Norton and Co Ltd
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Filing: 1963-10-23
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Granted: 1965-11-09
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Richard P Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:11
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/16; B23B31/16233; B23B31/16254; B23B13/00; B23B13/12; B23B13/126; B23B31/16158; B23B31/16179; B23B31/16195; B23B31/16216; B23Q; B23Q1/00; B23Q1/72; B23Q1/76; B23Q1/763; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1274; Y10T279/1291; Y10T279/19; Y10T279/1973; Y10T82/00; Y10T82/25; Y10T82/2593
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A STEADY FOR A BAR TURNING MACHINE COMPRISING A COLLET HOLDER ADAPTED TO SURROUND THE WORK TO BE MACHINED AND HAVING A PLURALITY OF RADIALLY EXTENDING SLOTS, A PAD ACCOMMODATED IN EACH SLOT AND PROVIDED WITH INCLINED SURFACE MEANS, AN ANNULAR MEMBER PROVIDED WITH COMPLEMENTARY INCLINED SURFACE MEANS IN ENGAGEMENT WITH THE PADS INCLINED SURFACE MEANS AND SO ARRANGED THAT AXIAL MOVEMENT OF THE SAID ANNULAR MEMBER CAUSES RADIAL MOVEMENT OF THE PADS, AND HYDRAULIC PRESSURE MEANS FOR MOVING THE ANNULAR MEMBER IN A DIRECTION TO MOVE THE PADS INWARDS, THE HYDRAULIC PRESSURE MEANS COMPRISING A PLURALITY OF HYDRAULIC PISTONS, AND A PART ON WHICH THE PISTONS BEAR AND WHICH THREADEDLY ENGAGES THE ANNULAR MEMBER AND IS THEREBY AXIALLY ADJUSTABLE WITH RESPECT TO THE ANNULAR MEMBER.
Claim 2
Dependent Claim
126 words
A STEADY FOR A BAR TURNING MACHINE COMPRISING A COLLET HOLDER ADAPTED TO SURROUND THE WORK TO BE MACHINED AND HAVING A PLURALITY OF RADIALLY EXTENDING SLOTS, A PAD ACCOMMODATED IN EACH SLOT AND PROVIDED WITH INCLINED SURFACE MEANS, AN ANNULAR MEMBER PROVIDED WITH COMPLEMENTARY INCLINED SURFACE MEANS IN ENGAGEMENT WITH THE PADS INCLINED SURFACE MEANS AND SO ARRANGED THAT AXIAL MOVEMENT OF THE SAID ANNULAR MEMBER CAUSES RADIAL MOVEMENT OF THE PADS, AND HYDRAULIC PRESSURE MEANS FOR MOVING THE ANNULAR MEMBER IN A DIRECTION TO MOVE THE PADS INWARDS, THE HYDRAULIC PRESSURE MEANS COMPRISING A PLURALITY OF HYDRAULIC PISTONS, AND A PART ON WHICH THE PISTONS BEAR AND WHICH THREADEDLY ENGAGES THE ANNULAR MEMBER AND IS THEREBY AXIALLY ADJUSTABLE WITH RESPECT TO THE ANNULAR 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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |