US3640147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toolholder assembly for machine tool
Assignee: Olivetti SpA
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Filing: 1970-03-02
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Granted: 1972-02-08
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Expires: 1990-03-02
Abstract
Abstract In a device for feeding a quill of machine tool, which is slidable axially in a support, the quill is threaded externally and cooperates with a lead nut rotatable concentrically with respect to the quill and is integral with a gear rotatable to effect the advance of the quill. The lead nut comprises two parts which are spaced axially by a flexible annular plate formed between an internal groove and an adjacent external groove in the lead nut to permit axial adjustment of the two parts. The lead nut includes two independent ball circulation circuits one for each one of the two parts respectively. The quill is mounted in the support by means of two elastic bushes spaced from one another and adjustable axially by means of a pressure collar to eliminate axial play of the quill.
Inventors
- 👤 Giuseppe Fantoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:18
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/16; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6793; Y10T408/73; Y10T409/00; Y10T409/30; Y10T409/306664; Y10T409/306776; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/1868; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
An operating device for feeding a nonrotatable spindle holder of a machine tool including a frame, a spindle rotatable in said spindle holder and adapted to support a tool, and means for mounting said spindle holder slidable axially in said frame, the combination comprising: a threaded portion on the external surface of said spindle holder, a lead nut rotatable on said frame concentric with said spindle holder and cooperating with said threaded portion, a gear concentrically bodily rotatable with said lead nut, rotation of said gear and said lead nut axially feeding said spindle holder, and means for rotating said gear and said lead nut independently of said spindle.
Claim 2
Dependent Claim
109 words
An operating device for feeding a nonrotatable spindle holder of a machine tool including a frame, a spindle rotatable in said spindle holder and adapted to support a tool, and means for mounting said spindle holder slidable axially in said frame, the combination comprising: a threaded portion on the external surface of said spindle holder, a lead nut rotatable on said frame concentric with said spindle holder and cooperating with said threaded portion, a gear concentrically bodily rotatable with said lead nut, rotation of said gear and said lead nut axially feeding said spindle holder, and means for rotating said gear and said lead nut independently of said spindle.
Claim 3
Dependent Claim
49 words
A device according to claim 1, further including: elastic bushings for mounting said spindle holder on said frame, said bushing being axially spaced from one another, and a pressure collar engaging one of said bushings and adjustable axially to eliminate axial play of said spindle holder in said frame.
Claim 4
Dependent Claim
75 words
A device according to claim 1, wherein said lead nut is formed into two axially spaced portions; by an internal groove on said lead nut, and an external groove on said lead nut adjacent to said internal groove, said grooves being located between said two portions; and said device including a flexible annular plate formed between said grooves to join said portions and to permit axial adjustment of said two parts relative to each other.
Claim 5
Dependent Claim
35 words
A device according to claim 3, wherein said lead nut is of the ball circulation type, and includes: two independent circulation circuits, the balls of said circuits being disposed in one of said two portions.
Claim 6
Dependent Claim
49 words
The device according to claim 4 further including: elastic bushings for mounting said spindle holder on said frame, said bushing being axially spaced from one another, and a pressure collar engaging one of said bushings and adjustable axially to eliminate axial play of said spindle holder in said frame.
Claim 7
Dependent Claim
67 words
A device according to claim 3, comprising: at least one first screw crossing one of said portions and said plate and screwed on the other of said portions to effect adjustment by axially flexing said plate, and at least one other screw also screwed on said other part and crossing said plate to bear against said one part to prevent slackening and tightening of said first screw.
Claim 8
Dependent Claim
65 words
The device according to claim 1 further including a splined portion integral with said spindle; a drive member, rotatably supported in said frame; said drive member having an aperture configured congruent with said splined portion and slidably receiving said splined portion so that rotation of said drive member effects rotation of said spindle while permitting axial movement of said spindle with respect to said frame.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |