US3691899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool change device for a machine tool
Assignee: Inc C Olivetti & C Spa
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Filing: 1971-05-03
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Granted: 1972-09-19
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Expires: 1991-05-03
Abstract
Abstract A machine tool with a device for effecting rapid tool changes comprising a frame carrying a rotatable spindle capable of being coupled to a tool through the intermediary of a tool holder to which the tool is secured. A mechanism for lining up the spindle, from whatever position it is in, to a predetermined angular setting in order to allow engagement of the tool holder with the spindle, and translational locking devices inside the spindle operative to provide a coupling to the tool holder to operate the spindle after the tool has been connected thereto are provided.
Inventors
- 👤 Bruno Antonietto
- 👤 Elio Pagella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/003; B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23B31/261; B23B31/263; B23Q; B23Q3/00; B23Q3/155; B23Q3/1552; B23Q3/15526; B23Q3/15534; B23Q3/157; B23Q3/15706; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/20; B23B2260/00; B23B2260/022; B23B2270/00; B23B2270/20; B23Q2003/15527; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5104; Y10T29/5105; Y10T29/5107; Y10T29/5152; Y10T29/5154; Y10T29/5155; Y10T29/5157; Y10T408/00; Y10T408/36; Y10T408/37; Y10T408/60; Y10T409/00; Y10T409/30; Y10T409/30448; Y10T409/306664; Y10T409/306776; Y10T409/309184; Y10T409/309352; Y10T409/309408; Y10T483/00; Y10T483/17; Y10T483/1733; Y10T483/179; Y10T483/1793; Y10T483/1795
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
A device for removably connecting a tool with a spindle of a machine tool, wherein the tool to be connected is secured to a tool holder presented to said spindle in a predetermined angular position and provided with slots for engagement by corresponding projections of said spindle to transmit operational torque to said tool holder upon said spindle being advanced by operating means into engagement with said tool holder, the machine tool comprising a clamping mechanism normally clamping the tool holder to present it to said spindle in a predetermined angular position, said device comprising an element angularly movable synchronously with said spindle and cooperating with a counterelement operable in response to engagement with said element for rotating said spindle independently of said operating means to said predetermined angular position wherein said projections are aligned with said slots.
Claim 2
Independent Claim
138 words
A device for removably connecting a tool with a spindle of a machine tool, wherein the tool to be connected is secured to a tool holder presented to said spindle in a predetermined angular position and provided with slots for engagement by corresponding projections of said spindle to transmit operational torque to said tool holder upon said spindle being advanced by operating means into engagement with said tool holder, the machine tool comprising a clamping mechanism normally clamping the tool holder to present it to said spindle in a predetermined angular position, said device comprising an element angularly movable synchronously with said spindle and cooperating with a counterelement operable in response to engagement with said element for rotating said spindle independently of said operating means to said predetermined angular position wherein said projections are aligned with said slots.
Claim 3
Dependent Claim
55 words
A device according to claim 1, including a reciprocable member adapted to operate said counterelement, and wherein the counterelement comprises a cam and the element comprises a cam follower, said cam follower being coupled to the spindle and operative in response to engagement with the cam to rotate the spindle to the predetermined angular setting.
Claim 4
Dependent Claim
14 words
A device according to claim 2, wherein the element comprises a double helical cam.
Claim 5
Dependent Claim
15 words
A device according to claim 2, wherein the reciprocable member comprises a double-acting fluid piston.
Claim 6
Dependent Claim
43 words
A device according to claim 1, including a reciprocable member adapted to operate said counterelement and to engage a control member which renders effective said operating means for advancing the spindle into the tool holder after the spindle reaches said angularly aligned position.
Claim 7
Dependent Claim
47 words
A device according to claim 5, wherein said element comprises a roller rotatably mounted on a fluted shaft to rotate said spindle and said counterelement comprises a cylindrical member coaxial with said fluted shaft and including a camming edge which engages said roller upon being axially reciprocated.
Claim 8
Dependent Claim
20 words
A device according to claim 6, wherein said camming edge is formed of two symmetric and converging portions, substantially V-shaped.
Claim 9
Dependent Claim
21 words
A device according to claim 7, including a double-acting fluid piston which reciprocates said cylindrical member with respect to said roller.
References Cited (Backward Citations)
US3473419A
Cited
US3455207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |