US3633931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-change chucks
Assignee: Individual
•
Filing: 1970-05-12
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Granted: 1972-01-11
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Expires: 1990-05-12
Abstract
Abstract A quick-change chuck for a machine tool in which by means of only one hand the operator may insert a toolholding socket with an adjusting nut thereon into a shank and lock the same to the shank by means of locking balls engaging into a peripheral groove in the adjusting nut and may also with the same hand release the locking balls from the adjusting nut and withdraw the tool socket with the adjusting nut from the shank.
Inventors
- 👤 Otto Bilz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:18
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/028; B23B31/10; B23B31/107; B23B31/1071; Y; Y10; Y10S; Y10S279/00; Y10S279/904; Y10S279/905; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17188; Y10T279/17196; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
295 words
In a quick-change chuck comprising a hollow cylindrical shank, a tool socket adapted to be inserted into said shank and to hold a tool, an adjusting nut adapted to be screwed upon the threaded front end of said socket for adjusting the same to different positions in the longitudinal direction of said shank, said adjusting nut having a peripheral groove, locking balls guided in transverse bores in the shank or in a part secured to said shank, and a control sleeve surrounding and slidable along said shank and adapted by a movement in one direction to press said locking balls radially inwards so as partly to project from said guide bores into said peripheral groove of said nut to lock the latter to said shank and, by a movement in the opposite direction, to release said locking balls from said nut so as to permit said nut together with said tool socket to be withdrawn from said shank, the improvement comprising a plurality of connecting bars, the outer wall of said shank which is surrounded by said control sleeve having a plurality of longitudinal grooves spaced at equal peripheral distances from each other and each of said grooves having one of said connecting bars longitudinally slidable therein, said connecting bars being adapted to connect said adjusting nut to said control sleeve for transmitting from one of these elements to the other the longitudinal rearward movement which is manually exerted upon said adjusting nut for locking said adjusting nut to said shank, said connecting bars being further adapted to connect said control sleeve to said adjusting nut for transmitting from one of these elements to the other longitudinal forward movement which is manually exerted upon said control sleeve for releasing said adjusting nut from said Shank.
Claim 2
Dependent Claim
295 words
In a quick-change chuck comprising a hollow cylindrical shank, a tool socket adapted to be inserted into said shank and to hold a tool, an adjusting nut adapted to be screwed upon the threaded front end of said socket for adjusting the same to different positions in the longitudinal direction of said shank, said adjusting nut having a peripheral groove, locking balls guided in transverse bores in the shank or in a part secured to said shank, and a control sleeve surrounding and slidable along said shank and adapted by a movement in one direction to press said locking balls radially inwards so as partly to project from said guide bores into said peripheral groove of said nut to lock the latter to said shank and, by a movement in the opposite direction, to release said locking balls from said nut so as to permit said nut together with said tool socket to be withdrawn from said shank, the improvement comprising a plurality of connecting bars, the outer wall of said shank which is surrounded by said control sleeve having a plurality of longitudinal grooves spaced at equal peripheral distances from each other and each of said grooves having one of said connecting bars longitudinally slidable therein, said connecting bars being adapted to connect said adjusting nut to said control sleeve for transmitting from one of these elements to the other the longitudinal rearward movement which is manually exerted upon said adjusting nut for locking said adjusting nut to said shank, said connecting bars being further adapted to connect said control sleeve to said adjusting nut for transmitting from one of these elements to the other longitudinal forward movement which is manually exerted upon said control sleeve for releasing said adjusting nut from said Shank.
Claim 3
Dependent Claim
187 words
A quick-change chuck as defined in claim 1, in which each of said connecting bars has a projection extending radially outwards from said bar and a longitudinal extension at a right angle to said projection having a front end surface engaging upon the rear end surface of said adjusting nut, a compression spring extending longitudinally between said shank and said control sleeve and having one end engaging upon said projection and another end engaging upon said control sleeve so that, when said adjusting nut after being inserted into the open front end of said shank is manually pushed toward the rear of said shank, it presses against said front end surface of said extension of each of said connecting bars and moves the same toward the rear whereby said projections on said connecting bars compress said spring and said spring, in turn, then shifts said control sleeve toward the rear along said shank and said control sleeve thereby presses said locking balls radially inwards in said guide bores so as to engage into said peripheral groove of said adjusting nut to lock said nut to said shank.
Claim 4
Dependent Claim
101 words
A quick-change chuck as defined in claim 2, in which, when said control sleeve is shifted manually forwards from its rear position, its movement is transmitted by said spring to said projections on said connecting bars, whereby said extensions on said bars press against said adjusting nut so that, when said control sleeve has been shifted forwardly to the position in which said locking balls are released from said peripheral groove and when said control sleeve is then moved further forwardly, said connecting bars push said nut beyond said position toward and out of the open front end of said shank.
Claim 5
Dependent Claim
79 words
A quick-change chuck as defined in claim 3, in which, when said control sleeve is shifted forwardly and said locking balls are released from said peripheral groove, at least two of said locking balls are disposed substantially radially opposite to said extensions within said control sleeve and are prevented by said extensions from moving radially inwards when said adjusting nut is removed, said locking balls then also preventing said control sleeve from moving further forwardly relative to said shank.
References Cited (Backward Citations)
US2926020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |