US3583716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck assembly for power tools
Assignee: Singer Co
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Filing: 1969-02-06
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Granted: 1971-06-08
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Expires: 1989-02-06
Abstract
Abstract This disclosure relates to a chuck assembly for a power tool, such as a saber saw, and permits quick attachment or detachment of the saw blade to the saw bar by a simple turning movement of a collar member of the assembly to effect locking or unlocking, respectively, of said blade.
Inventors
- 👤 Marion F Daniel Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:09
CPC Classifications
B; B23; B23D; B23D51/00; B23D51/08; B23D51/10; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/107; B23B31/1071; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17803
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
In a power tool having a housing and an electric motor for driving an implement, the combination of: a. a toolbar journaled in the housing and connected to be driven by the motor, b. the toolbar having a free end projecting from the housing, c. an aperture formed at the free end of the toolbar to extend axially inwardly therefrom, d. a collar means connected to the toolbar to surround a portion of the axial aperture thereof, and to be continuously turnable thereon prior to the implement being connected, e. a cam surface formed on the inner periphery of the collar means, which surface is of successively decreasing radius, f. a transverse opening extending through one side the free end of the toolbar to place the cam surface in communication with the axial aperture, and g. cam means held captive in the transverse opening by the collar means and adapted to be increasingly urged into the axial aperture lockingly to engage the implement upon the collar means being turned.
Claim 2
Dependent Claim
169 words
In a power tool having a housing and an electric motor for driving an implement, the combination of: a. a toolbar journaled in the housing and connected to be driven by the motor, b. the toolbar having a free end projecting from the housing, c. an aperture formed at the free end of the toolbar to extend axially inwardly therefrom, d. a collar means connected to the toolbar to surround a portion of the axial aperture thereof, and to be continuously turnable thereon prior to the implement being connected, e. a cam surface formed on the inner periphery of the collar means, which surface is of successively decreasing radius, f. a transverse opening extending through one side the free end of the toolbar to place the cam surface in communication with the axial aperture, and g. cam means held captive in the transverse opening by the collar means and adapted to be increasingly urged into the axial aperture lockingly to engage the implement upon the collar means being turned.
Claim 3
Dependent Claim
74 words
The combination claimed in claim 1 in which the power tool has a reciprocating toolbar to which the implement is affixed, and wherein: a. the toolbar defines a saw bar, b. the cam means is a ball, and c. the ball is engaged by the successively decreasing radius of the cam surface of the collar means whereby on turning of the collar means the ball is increasingly driven into locking engagement with the implement.
Claim 4
Dependent Claim
33 words
The combination claimed in claim 1 wherein: a. the collar means is turned through an angle of less than 180* in clamping the implement to, or releasing the implement from the saw bar.
Claim 5
Dependent Claim
42 words
The combination claimed in claim 2 wherein: a. the ball has a diameter greater than the width of the side in which the transverse aperture is formed whereby the ball simultaneously extend into the axial aperture and outwardly of the transverse aperture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |