US3674281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool chuck assembly
Assignee: PEVRICK ENG CO Inc
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Filing: 1971-01-21
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Granted: 1972-07-04
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Expires: 1991-01-21
Abstract
Abstract A tool chuck assembly to firmly retain the cylindrical stem of a tool wherein a plurality of ball elements are frictionally pressed against the stem by a wedge shaped sleeve, the sleeve being movable into and out of engagement with the balls by means of a manually actuatable lever.
Inventors
- 👤 John R Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:33
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/22; Y; Y10; Y10S; Y10S279/00; Y10S279/904; Y10S279/905; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17188; Y10T279/17196; Y10T279/17411; Y10T279/17461; Y10T279/34; Y10T279/3431; Y10T279/3451
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A chuck assembly to retain the stem of a rotatable tool comprising: a rotatably driven shaft connected to said stem; a ball assembly being capable of frictionally contacting said stem in a first position to retain such within said shaft, said ball assembly being movable to a second position to permit removal and entry of said stem within said shaft; means to effect movement of said ball assembly into frictional contact with said stem; actuation means to effect operation of said means; and both said means being non-rotatable with respect to said shaft.
Claim 2
Dependent Claim
93 words
A chuck assembly to retain the stem of a rotatable tool comprising: a rotatably driven shaft connected to said stem; a ball assembly being capable of frictionally contacting said stem in a first position to retain such within said shaft, said ball assembly being movable to a second position to permit removal and entry of said stem within said shaft; means to effect movement of said ball assembly into frictional contact with said stem; actuation means to effect operation of said means; and both said means being non-rotatable with respect to said shaft.
Claim 3
Dependent Claim
36 words
A chuck assembly as defined in claim 1 wherein: said means includes a wedge-shaped sleeve, said sleeve being continuously biased by a biasing means to maintain the frictional contact of said ball assembly with said stem.
Claim 4
Dependent Claim
16 words
A chuck assembly as defined in claim 2 wherein: said biasing mEans comprises a compression spring.
Claim 5
Dependent Claim
55 words
A chuck assembly as defined in claim 2 wherein: said actuation means includes an arm connected to said wedge-shaped sleeve, said arm being movable to effect movement of said wedge-shaped sleeve against said biasing means; and a lever assembly being connected to said arm, said lever assembly being manually operable to effect said arm movement.
Claim 6
Dependent Claim
27 words
A chuck assembly as defined in claim 4 wherein: said wedge-shaped sleeve includes an annular means, a head portion of said arm to cooperate with said recess.
Claim 7
Dependent Claim
28 words
A chuck assembly as defined in claim 1 wherein: said stem being cylindrical in configuration, said stem being locatable within a central longitudinal opening within said driven shaft.
Claim 8
Dependent Claim
27 words
A chuck assembly as defined in claim 1 wherein: said ball assembly being located within said driven shaft, said ball assembly including a plurality of separate balls.
Claim 9
Dependent Claim
27 words
A chuck assembly as defined in claim 7 wherein: said balls being formed of an extremely hard material of construction and having an outer smooth surface finish.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |