Patent US3762271A successfully refreshed from Google Patents.
US3762271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for clamping a taper shank tool-holder in the nose of a rotary machine-tool spindle
Assignee: Ratier Forest SA
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Filing: 1971-06-01
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Granted: 1973-10-02
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Expires: 1991-06-01
Abstract
Abstract A device for clamping a tapershank tool-holder in the nose of a rotary machine-tool spindle, of the type comprising a retaining element capable of hooking on a mating element of the tool-holder and urged axially in the direction of clamping by a restoring spring, said retaining element being displaced, against the force of said spring, by an unclamping control member axially slidable within the machine spindle. It is possible to increase the strength clamping the tool-holder while the effort necessary to unclamp it may be maintained to a relatively low value, by the fact that the device further comprises a locking member axially connected to the retaining element and engaging a locking cam secured to the machine spindle, with said locking member being subjected to the action of a control member.
Inventors
- 👤 R Poincenot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:06
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23B31/261; B23B31/265; Y; Y10; Y10T; Y10T408/00; Y10T408/94; Y10T408/95; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408; Y10T409/309464; Y10T409/309576; Y10T409/309912
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
A device for clamping a taper shank tool-holder in the noSe of a rotary machine-tool spindle, comprising: retaining element axially movable within said spindle, a corresponding mating element carried by the tool-holder and adapted to be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle and adapted to push said retaining element against the action of said restoring spring to unclamp said toolholder, said device further comprising a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member for locking said retaining element in tool-holder clamping condition, and a locking control member for controlling said locking member for cooperation with said locking cam.
Claim 2
Independent Claim
148 words
A device for clamping a taper shank tool-holder in the noSe of a rotary machine-tool spindle, comprising: retaining element axially movable within said spindle, a corresponding mating element carried by the tool-holder and adapted to be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle and adapted to push said retaining element against the action of said restoring spring to unclamp said toolholder, said device further comprising a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member for locking said retaining element in tool-holder clamping condition, and a locking control member for controlling said locking member for cooperation with said locking cam.
Claim 3
Independent Claim
202 words
A device for clamping a taper shank tool-holder in the nose of the rotary machine-tool spindle, comprising a retaining element axially movable within said spindle, a corresponding mating element carried by the tool holder and adapted to be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle, and adapted to push said retaining element against the action of said restoring spring to unclamp said tool-holder, a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member, and a locking control member for controlling said locking member for cooperation with said locking cam, said locking control member being slidable axially in said spindle, said device further comprising an abutment part secured to said retaining element and a locking spring, said locking spring being weaker than said restoring spring and being inserted between said abutment part and said locking control member to urge said locking control member in a direction to make said locking member engage said locking cam.
Claim 4
Independent Claim
202 words
A device for clamping a taper shank tool-holder in the nose of the rotary machine-tool spindle, comprising a retaining element axially movable within said spindle, a corresponding mating element carried by the tool holder and adapted to be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle, and adapted to push said retaining element against the action of said restoring spring to unclamp said tool-holder, a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member, and a locking control member for controlling said locking member for cooperation with said locking cam, said locking control member being slidable axially in said spindle, said device further comprising an abutment part secured to said retaining element and a locking spring, said locking spring being weaker than said restoring spring and being inserted between said abutment part and said locking control member to urge said locking control member in a direction to make said locking member engage said locking cam.
Claim 5
Independent Claim
157 words
A device for clamping a taper shank tool-holder in the nose of a rotary machine-tool spindle, comprising a retaining element axially movable within said spindle, a corresponding mating element carried by the tool-holder and adapted by be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle and adapted to push said retaining element against the action of said restoring spring to unclamp said tool-holder, a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member, and a locking control member for controlling said locking member for cooperation with said locking cam, said locking cam being constituted by a frusto-conical surface coaxial with said spindle and having an apex angle of approximately 140*.
Claim 6
Independent Claim
157 words
A device for clamping a taper shank tool-holder in the nose of a rotary machine-tool spindle, comprising a retaining element axially movable within said spindle, a corresponding mating element carried by the tool-holder and adapted by be engaged by said retaining element, a restoring spring urging said retaining element in the direction ensuring clamping of said tool-holder in said spindle, an unclamping control member axially slidable within said spindle and adapted to push said retaining element against the action of said restoring spring to unclamp said tool-holder, a locking member axially slidable with respect to said spindle and operatively connected to said retaining element, a locking cam secured to said spindle and adapted to be engaged by said locking member, and a locking control member for controlling said locking member for cooperation with said locking cam, said locking cam being constituted by a frusto-conical surface coaxial with said spindle and having an apex angle of approximately 140*.
Claim 7
Dependent Claim
68 words
The device according to claim 3, wherein said locking member is constituted by a sleeve having longitudinal resilient tongues the tips of which are naturally urged toward one another, each of said tongues having an outer heel for engagement with said locking cam and an inner heel, said locking control member having a conical portion and said inner heels engaging said conical portion of said locking control member.
Claim 8
Dependent Claim
31 words
The device according to claim 2, wherein said locking control member is adapted to engage said abutment part secured to said retaining element and also to serve as unclamping control. member.
References Cited (Backward Citations)
US2860547A
Cited
US3323419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |