Patent US3672256A successfully refreshed from Google Patents.
US3672256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal chuck device
Assignee: BMC Industries Inc
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Filing: 1970-11-09
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Granted: 1972-06-27
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Expires: 1990-11-09
Abstract
Abstract Centrifugal force responsive means for holding a tool in the bore of a spindle, in which the tool is carried by a tool holder insertable into and removable from the spindle bore, the tool holder having an inner end provided with a cavity, and a chuck being disposed in the spindle bore and having spring fingers, the ends of which engage in the cavity of the tool holder to initially hold the tool holder in the spindle, and the gripping action of the chuck fingers is increased by centrifugal force.
Inventors
- 👤 Wojciech B Kosmowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:20
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/202; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17957; Y10T279/17965; Y10T279/17974; Y10T279/24; Y10T279/247
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
A chuck device comprising: a rotatable spindle having a bore coaxial with the axis of rotation, a chuck in said bore having a plurality of circumferentially spaced elongated and resilient fingers, said fingers including means being responsive to centrifugal force to urge the free ends of said fingers outwardly, a holder in said bore, said holder and said fingers having coengaged portions confining said fingers against outward movement upon rotation of said spindle, and said holder having means for supporting a member to be rotated.
Claim 2
Dependent Claim
85 words
A chuck device comprising: a rotatable spindle having a bore coaxial with the axis of rotation, a chuck in said bore having a plurality of circumferentially spaced elongated and resilient fingers, said fingers including means being responsive to centrifugal force to urge the free ends of said fingers outwardly, a holder in said bore, said holder and said fingers having coengaged portions confining said fingers against outward movement upon rotation of said spindle, and said holder having means for supporting a member to be rotated.
Claim 3
Dependent Claim
85 words
A chuck device as defined in claim 1, wherein said chuck comprises an end section from which said fingers extend and with which said fingers are integral, said fingers being relatively thin and flexible at the juncture with said end section, and said fingers having weight portions adjacent the free ends of said fingers and responsive to centrifugal force to urge the free ends of said fingers outwardly, said portions of said fingers coengageable with said holder being at the free ends of said fingers.
Claim 4
Dependent Claim
95 words
A chuck device as defined in claim 1, wherein said chuck comprises an end section from which said fingers extend and with which said fingers are integral, said fingers being relatively thin and flexible at the juncture with said end section, and said fingers having weight portions adjacent the free ends of said fingers and responsive to centrifugal force to urge the free ends of said fingers outwardly, said portions of said fingers coengageable with said holder being at the free ends of said fingers, said weight portions having end faces engageable by said holder.
Claim 5
Dependent Claim
114 words
A chuck device as defined in claim 1, wherein said chuck comprises an end section from which said fingers extend and with which said fingers are integral, said fingers being relatively thin and flexible at the juncture with said end section, and said fingers having weight portions adjacent the free ends of said fingers and responsive to centrifugal force to urge the free ends of said fingers outwardly, said portions of said fingers coengageable with said holder being at the free ends of said fingers, said holder having a cavity in an end thereof bordered by a wall cooperative with said coengaged portions of said fingers to grip said holder responsive to centrifugal force.
Claim 6
Dependent Claim
111 words
A chuck device as defined in claim 1, wherein said chuck comprises an end section from which said fingers extend and with which said fingers are integral, said fingers being relatively thin and flexible at the juncture with said end section, and said fingers having weight portions adjacent the free ends of said fingers and responsive to centrifugal force to urge the free ends of said fingers outwardly, said portions of said fingers coengageable with said holder being at the free ends of said fingers, said portions at the free ends of said fingers coengageable with said holder being initially flexed inwardly to initially retain said holder connected to said chuck.
Claim 7
Dependent Claim
37 words
A chuck device as defined in claim 1, wherein said holder is provided with means external of said spindle for accomodating a tool for inserting said holder into said spindle and pulling said holder from said spindle.
Claim 8
Dependent Claim
22 words
A chuck device as defined in claim 6, wherein said means for accomodating a tool comprises oppositely facing shoulders on said holder.
Claim 9
Dependent Claim
32 words
A chuck device as defined in claim 1, wherein said chuck is press fit in said bore, and includes means connectable to a pulling tool to remove said chuck from said bore.
Claim 10
Dependent Claim
26 words
A chuck device as defined in claim 1, wherein said holder has a central opening and means for ceNtralizing and holding a shank in said opening.
Claim 11
Dependent Claim
91 words
A chuck device comprising: a rotatable spindle having a bore coaxial with the axis of rotation, chuck means in said bore including a plurality of circumferentially spaced elongated and resilient fingers, said fingers including means being responsive to centrifugal force to urge the free ends of said fingers outwardly, and said free ends each of said fingers having means engageable in a cavity of a holder in the bore of said spindle for retaining the holder in the bore and for rotating said holder in response to rotation of said spindle.
Claim 12
Dependent Claim
91 words
A chuck device comprising: a rotatable spindle having a bore coaxial with the axis of rotation, chuck means in said bore including a plurality of circumferentially spaced elongated and resilient fingers, said fingers including means being responsive to centrifugal force to urge the free ends of said fingers outwardly, and said free ends each of said fingers having means engageable in a cavity of a holder in the bore of said spindle for retaining the holder in the bore and for rotating said holder in response to rotation of said spindle.
Claim 13
Dependent Claim
68 words
A chuck device as defined in claim 10, wherein said chuck comprises an end section from which said fingers extend and with which said fingers are integral, said fingers being relatively thin and flexible at the juncture with said end section, and said fingers having weight portions adjacent the free ends of said fingers and responsive to centrifugal force to urge the free ends of said fingers outwardly.
References Cited (Backward Citations)
US2356245A
Cited
US3168322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |