US3909062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-tightening tool chuck with a stop member adapted to be axially displaced by means of screws
Assignee: FRANKEN FABRIK fur PRAZISIONSW
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Filing: 1974-02-05
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Granted: 1975-09-30
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Expires: 1994-02-05
Abstract
Abstract A self-tightening tool chuck for a machine tool comprising a chuck member having a bore to one end of the member and the other end is adapted for coaxial connection of the chuck member to a machine shaft. A stop member and a tool housing are axially adjustable in the bore. The tool housing has an internal thread for receiving a tool and the tool and housing are clampable to the chuck member by means of a ring nut mounted on the chuck member. The positioning of the stop member is defined by a radially adjustable locating screw which has a frusto-conical bearing surface cooperable with a bearing surface on the stop member inclined at an acute angle to the axis of the chuck member.
Inventors
- 👤 Edmo Benatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/208; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17411; Y10T279/17487; Y10T279/17495; Y10T279/17529; Y10T279/33; Y10T279/34; Y10T279/3487
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
In a self-adjusting tool chuck comprising a chuck member having means on one end adapted to be coaxially secured to a machine spindle, and an axial bore at the other end, a tool housing being axially slidably supported in said bore and having an internal threaded portion for receiving a tool, a stop member being axially adjustably supported in said bore and having means to cooperate with said tool housing for adjusting axial movements thereof, a locating screw rAdially adjustably mounted in said chuck member and engagable with the stop member for adjusting said stop member in the axial direction, a ring nut threadingly engagable with external threads on the chuck member, said ring nut cooperating with means on said chuck member for securing and releasing said tool housing in said chuck member; wherein the improvement comprises said locating screw having a frusto-conical bearing surface cooperating with an inclined bearing surface on the stop member for said axial adjustment of said stop member, said inclined bearing surface on the stop member extending at an acute angle to the center axis of the chuck member.
Claim 2
Dependent Claim
184 words
In a self-adjusting tool chuck comprising a chuck member having means on one end adapted to be coaxially secured to a machine spindle, and an axial bore at the other end, a tool housing being axially slidably supported in said bore and having an internal threaded portion for receiving a tool, a stop member being axially adjustably supported in said bore and having means to cooperate with said tool housing for adjusting axial movements thereof, a locating screw rAdially adjustably mounted in said chuck member and engagable with the stop member for adjusting said stop member in the axial direction, a ring nut threadingly engagable with external threads on the chuck member, said ring nut cooperating with means on said chuck member for securing and releasing said tool housing in said chuck member; wherein the improvement comprises said locating screw having a frusto-conical bearing surface cooperating with an inclined bearing surface on the stop member for said axial adjustment of said stop member, said inclined bearing surface on the stop member extending at an acute angle to the center axis of the chuck member.
Claim 3
Dependent Claim
32 words
The tool chuck as claimed in claim 1, in which the inclined bearing surface of the stop member is formed at one end of a channel shaped groove with an arched section.
Claim 4
Dependent Claim
33 words
The tool chuck as claimed in claim 1, in which the ring nut is provided with an external scale to indicate the degree of displacement of the stop member from a datum position.
Claim 5
Dependent Claim
23 words
The tool chuck as claimed in claim 3, in which the scale is provided on an oblique front face of the ring nut.
Claim 6
Dependent Claim
88 words
The tool chuck as claimed in claim 1, in which the tool housing has longitudinal slits and an external coneshaped end portion, said means for adjusting the axial position of said tool housing including a sleeve axially moveable on the chuck member and having an internal cone-shaped portion abutting the external cone-shaped portion of the tool housing, said sleeve having a radial flange cooperating with a radial flange on said ring nut to axially adjust said sleeve on the chuck member, and means securing the sleeve against rotation.
References Cited (Backward Citations)
US3547454A
Cited
US3677560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |