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US3708178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressive-tightening spindle chuck for milling machines or other machine tools
Assignee: Individual
•
Filing: 1970-07-24
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Granted: 1973-01-02
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Expires: 1990-07-24
Abstract
Abstract A tool-holding chuck having a tapered body in which a generally tapered socket-receiving chamber is formed, the socket and chamber having a pair of spaced tapered cooperative bearing surfaces, and a rotatable control ring encompassing the tapered body and being rotatably and axially manipulatable relative thereto for effecting quick-release and change of the socket positioned in the chuck body chamber.
Inventors
- 👤 R Lauricella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:11
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/107; B23B31/1071; Y; Y10; Y10S; Y10S279/00; Y10S279/904; Y10S279/905; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17803; Y10T279/34; Y10T279/3481
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
224 words
Tool-holding chuck of the progressive-tightening type, particularly for milling machines or other machine tools, comprising; a body having a substantially tapered configuration, a chamber formed in said body and having tapered surface portions; a detachable socket comprising an essentially tapered shank engageable within said chamber and being centered relative thereto, said chamber tapered surface portions and said shank each including a pair of spaced cooperative tapered bearing surfaces lying on the generatrix of a common cone adjacent respectively the opening and bottom ends of said chamber in said body; means for locking said socket in said body, said locking means comprising a plurality of balls each housed in holes formed to extend transversely through the walls of said body and having diameters larger than the thickness of said body so project interiorly and exteriorly thereof; helical grooves formed in said socket for coacting with the radially inner surfaces of said balls; a control ring surrounding said body and said balls and beiNg peripherally rotatable relative to said body, hollow relief portions being formed in the inner peripheral surface of said ring adapted to receive at least the radially outer portions of said balls, said body having external arcuately extending notches; and at least one stud means mounted on said ring extending into said notches for limiting rotation of said control ring about said body.
Claim 2
Dependent Claim
224 words
Tool-holding chuck of the progressive-tightening type, particularly for milling machines or other machine tools, comprising; a body having a substantially tapered configuration, a chamber formed in said body and having tapered surface portions; a detachable socket comprising an essentially tapered shank engageable within said chamber and being centered relative thereto, said chamber tapered surface portions and said shank each including a pair of spaced cooperative tapered bearing surfaces lying on the generatrix of a common cone adjacent respectively the opening and bottom ends of said chamber in said body; means for locking said socket in said body, said locking means comprising a plurality of balls each housed in holes formed to extend transversely through the walls of said body and having diameters larger than the thickness of said body so project interiorly and exteriorly thereof; helical grooves formed in said socket for coacting with the radially inner surfaces of said balls; a control ring surrounding said body and said balls and beiNg peripherally rotatable relative to said body, hollow relief portions being formed in the inner peripheral surface of said ring adapted to receive at least the radially outer portions of said balls, said body having external arcuately extending notches; and at least one stud means mounted on said ring extending into said notches for limiting rotation of said control ring about said body.
Claim 3
Dependent Claim
90 words
A chuck as claimed in claim 1, said control ring having cam faces formed on one end surface thereof, and further stud means being mounted on said body; said cam faces adapted to be contacted by said further stud means, whereby in response to rotation of said ring about said body said stud means impart concommitant translational axial movement to said ring, and said ring engages a flange on said socket so as to eject the latter from said body upon slight mutual jamming between said cooperative tapered bearing surfaces.
Claim 4
Dependent Claim
82 words
A chuck as claimed in claim 1, said arcuate notches in said control ring have inclined surface portions, said inclined surface portions adapted to be contacted the ends of said stud means, whereby in response to rotation of said ring about said body said stud means impart concommitant translational axial movement to said ring, and said ring engages a flange on said socket so as to eject the latter from said body upon slight mutual jamming between said cooperative tapered bearing surfaces.
Claim 5
Dependent Claim
30 words
A chuck as claimed in claim 1, comprising means for automatically returning said control ring to an initial position relative to said body subsequent to manual rotation of said ring.
Claim 6
Dependent Claim
36 words
A chuck as claimed in claim 4, said ring returning means comprising a coil tension spring, one end said spring being fastened to said control ring and the other end of being fastened to said body.
Claim 7
Dependent Claim
83 words
A chuck as claimed in claim 1, wherein said arcuate notches in said control ring have radially outer surface portions formed in a helical contour adapted to be contacted by said stud means, whereby in response to rotation of said ring about said body said stud means impart concommitant translational axial movement to said ring, and said ring engages a flange on said socket so as to eject the latter from said body upon slight mutual jamming between said cooperative tapered bearing surfaces.
Claim 8
Dependent Claim
141 words
A chuck as claimed in claim 1, further stud means being mounted on said body, said control ring comprising a plurality of cam faces adapted to be engaged by said further stud means, said stud means in response to rotation of said ring about to said body imparting concommitent translational axial movement to said ring, said ring engaging a flange on said socket so as to eject the latter from said body upon slight mutual jamming between said cooperative tapered bearing surfaces; a plurality of coil compression springs being spaced at intervals along the periphery of said ring, said springs being compressed in response to rotation of said ring from its initial position, and adapted to impart expansive reactive forces against said cam faces so as to effect return rotational and axially translational movement of said ring relative to said body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |