US3767218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool chuck
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1973-02-21
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Granted: 1973-10-23
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Expires: 1993-02-21
Abstract
Abstract A ball chuck employing sets of circumferentially spaced balls for retaining a tool in the chuck in accurate alignment and providing a driving connection between the chuck and the tool.
Inventors
- 👤 W Bronne
- 👤 H Linthicum
- 👤 W Linthicum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:27
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/22; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752; Y10T279/17761; Y10T279/17811
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
A tool chuck comprising: a body member adapted to be rotatably driven and having an axial opening for receiving the shank of a tool to be rotated with the body member; a series of holes in the body member extending between the outer surface and the axial opening, said holes being spaced equidistant about the body member in planes perpendicular to the axis of the body member and spaced along the axis of the body member; at least two sets of balls mounted in the openings about the body member and extending into the axial opening and beyond the outside surface of the body member with the balls in each set being of the same size and the balls in different sets being of a uniformly larger size along the axis of the body member; a sleeve member slidably mounted around the body member and supported on the body member by axially spaced bearing surfaces concentric with the body member; the sleeve member having a tapered internal bore sized to engage the surfaces of the balls of each set when the balls are resting on a flat surface of a tool in the opening of the body member; and means to urge the sleeve member along the outer surface of the body member to force the tapered surface against the balls of each set.
Claim 2
Dependent Claim
224 words
A tool chuck comprising: a body member adapted to be rotatably driven and having an axial opening for receiving the shank of a tool to be rotated with the body member; a series of holes in the body member extending between the outer surface and the axial opening, said holes being spaced equidistant about the body member in planes perpendicular to the axis of the body member and spaced along the axis of the body member; at least two sets of balls mounted in the openings about the body member and extending into the axial opening and beyond the outside surface of the body member with the balls in each set being of the same size and the balls in different sets being of a uniformly larger size along the axis of the body member; a sleeve member slidably mounted around the body member and supported on the body member by axially spaced bearing surfaces concentric with the body member; the sleeve member having a tapered internal bore sized to engage the surfaces of the balls of each set when the balls are resting on a flat surface of a tool in the opening of the body member; and means to urge the sleeve member along the outer surface of the body member to force the tapered surface against the balls of each set.
Claim 3
Dependent Claim
272 words
A chuck for securing a tool having a shank portion with flat surfaces equally spaced about the circumference in a rotatable drive member comprising: a cylindrical body member adapted to be rotatably driven and having an outer surface and an axial bore of a size sufficient to receive the shank of the tool to be secured, the outer surface and the bore being concentric about the axis of the body member; a series of openings in the body member extending from the outer surface of the body member into the axial bore, said openings being arranged in sets about the circumference of the body member in relation to the position of flat surfaces on the tool shank, with each set of openings spaced axially along the body member; a series of sets of balls located in the openings about the body member and extending from a point outside the body member into the axial bore, each set of balls being the same size and the balls in different sets uniformly increasing in diameter along the axial length of the body member; a sleeve mounted around and slidably supported on the body member by axially spaced bearing surfaces, said sleeve having an internal surface tapered proportionately to the diameters of the balls in the body member openings whereby the tapered surface contacts the balls of different sets when the balls bear against the flat surfaces of a tool shank in the axial bore of the body member; and means to releasably urge the sleeve along the outer surface of the body member to force the tapered surface against the balls of each set.
Claim 4
Dependent Claim
272 words
A chuck for securing a tool having a shank portion with flat surfaces equally spaced about the circumference in a rotatable drive member comprising: a cylindrical body member adapted to be rotatably driven and having an outer surface and an axial bore of a size sufficient to receive the shank of the tool to be secured, the outer surface and the bore being concentric about the axis of the body member; a series of openings in the body member extending from the outer surface of the body member into the axial bore, said openings being arranged in sets about the circumference of the body member in relation to the position of flat surfaces on the tool shank, with each set of openings spaced axially along the body member; a series of sets of balls located in the openings about the body member and extending from a point outside the body member into the axial bore, each set of balls being the same size and the balls in different sets uniformly increasing in diameter along the axial length of the body member; a sleeve mounted around and slidably supported on the body member by axially spaced bearing surfaces, said sleeve having an internal surface tapered proportionately to the diameters of the balls in the body member openings whereby the tapered surface contacts the balls of different sets when the balls bear against the flat surfaces of a tool shank in the axial bore of the body member; and means to releasably urge the sleeve along the outer surface of the body member to force the tapered surface against the balls of each set.
Claim 5
Dependent Claim
18 words
The chuck of claim 2 wherein there are two sets of balls with three balls in each set.
References Cited (Backward Citations)
GB651556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |