US3667305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool having a rotary worktable
Assignee: Olivetti SpA
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Filing: 1970-06-18
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Granted: 1972-06-06
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Expires: 1990-06-18
Abstract
Abstract A machine tool having a rotary work-table driven in rotation by a circular gear carried by the work-table cooperating with a worm gear and drive mechanism mounted on the work-table support. The underside of the work-table bears upon a slideway. The work-table is locked to the slideway by means of three equidistant posts biased into clamping relationship with a slot in the slideway. An annular piston operates a linkage that engages the posts, and upon actuation of the piston the posts are moved to a position spaced from the slot to unlock the work-table for rotation. The annular piston also moves a plurality of bearings into engagement with the underside of the work-table to remove the full load thereof from the slideway to facilitate rotation.
Inventors
- 👤 Michelangelo Rasoira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:59
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/262; B23Q1/28; B23Q1/44; B23Q1/50; Y; Y10; Y10T; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1429; Y10T74/1453; Y10T74/1459; Y10T74/1465; Y10T74/1494
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A machine tool having a rotary work-table, a support for said work-table, wherein the improvement comprises: an annular slideway fixed to said support, a plane annular surface on said table for bearing on said slideway, a series of clamping elements mounted on said support and biased to normally keep said surface clamped against slideway, and a self-equalizing hydraulic system for effecting simultaneous release of all said clamping elements.
Claim 2
Dependent Claim
68 words
A machine tool having a rotary work-table, a support for said work-table, wherein the improvement comprises: an annular slideway fixed to said support, a plane annular surface on said table for bearing on said slideway, a series of clamping elements mounted on said support and biased to normally keep said surface clamped against slideway, and a self-equalizing hydraulic system for effecting simultaneous release of all said clamping elements.
Claim 3
Dependent Claim
55 words
A machine tool according to claim 1, wherein each one of said clamping element is constituted by a post located equidistant around said table comprising: an annular slot in said surface, each of said posts extending through said slot, and a flange on each of said posts retained in a widened portion of said slot.
Claim 4
Dependent Claim
41 words
A Machine tool according to claim 2, comprising: a stack of Belleville springs disposed in said support to bias each one of said posts, and a single annular piston comprised in said system and acting on said posts through intermediate means.
Claim 5
Dependent Claim
61 words
A machine tool according to claim 3, comprising: a second annular surface on said table, a set of cylindrical pistons comprised in said systems, and a set of rolliNg bearings each one mounted on a corresponding one of said cylindrical pistons and movable therewith to bear against said second surface during the actuation of said annular piston without shifting said table,
Claim 6
Dependent Claim
128 words
A machine tool according to claim 4, comprising: a first cylinder for said annular piston, a set of further cylinders for each one of said cylindrical pistons, and communicating ducts between said first cylinder and said further cylinders to cause said cylindrical pistons to move in the direction opposite to that of said annular piston, said intermediate means comprising: a series of pins each disposed in correspondence with one of said posts and cooperating with said annular pistons, a series of levers each co-operating with one of said pins, said annular piston acting on said posts through said pins and said levers, and a pair of microswitches for defining the clamped and released conditions of said table and actuatable by one of said levers in its extreme positions.
Claim 7
Dependent Claim
70 words
A machine tool according to claim 1, comprising a spindle rotatable around a horizontal axis, a slide carrying said support and slidably horizontally on the machine frame, a helical gear sector fixed to said support, a worm rotatable on said slide, and means for rotating said worm to tilt said support about an axis perpendicular to the axis of rotation of said table and to the axis of said spindle.
Claim 8
Dependent Claim
58 words
A machine tool according to claim 1, comprising: a helical gear fixed to said table, a worm rotatably mounted on said support and engaging said helical gear, and control means for rotating said worm to command both discrete rotations and continuous rotations of said table, said control means comprising an angular position detector disposed coaxially with said table.
Claim 9
Dependent Claim
94 words
A machine tool according to claim 7, wherein said worm has progressively varying pitch, comprising: a projection on said support rotatably mounting one end of said worm, a flange on said support, a sleeve inserted and guided in said flange and rotatably mounting the other end of said worm, and a spacing ring removably interposed between said sleeve and said support, and whereby by interchanging said ring with one of different thickness an axial shifting of said worm is caused to completely take up any play existing between said worm and said helical gear.
Claim 10
Dependent Claim
70 words
A machine tool according to claim 7, comprising: a further helical gear sector fixed to said support, a further worm rotatable on said slide, and means for rotating said further worm to tilt said support about an axis perpendicular to the axis of rotation of said table and to the axis of said spindle, the tilting axis of said support being coincident with the axis of said first named worm.
References Cited (Backward Citations)
US2952168A
Cited
US2975657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |