US3817648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill shank and chuck assembly for a drill press
Assignee: Unicorn Industries Ltd
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Filing: 1972-11-09
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Granted: 1974-06-18
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Expires: 1992-11-09
Abstract
Abstract A drill shank and chuck assembly adapted for use in a drill press or the like and embodying an adapter collet which, by a detent action, enables drill substitution to be effected without drill press adjustment.
Inventors
- 👤 H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:56
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/202; B23B31/008; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q11/00; B23Q11/10; B23Q11/1015; B23Q11/1023; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; B23B2226/00; B23B2226/33; B23B2260/00; B23B2260/114; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17111; Y10T279/17128; Y10T279/17162; Y10T279/17863; Y10T279/17871; Y10T279/17881; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/73; Y10T408/94; Y10T408/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
357 words
In combination, a drill press adapted for use in connection with a fluid-cooled core drill, said drill press comprising a shell, a quill slidable vertically in said shell, a hollow tubular spindle rotatably mounted within said quill for vertical endwise movements bodily with the quill, the lower end of said spindle being formed with a relatively deep frusto-conical socket having an upper wall portion which constitutes the bottom wall of the socket, said bottom wall of the socket being formed with a vertical axial bore therethrough establishing fluid communication between the socket and the interior of the spindle, a tubular frusto-conical collet of solid wall construction disposed within said socket with a taper fit, a bonnet nut threadedly received on the lower end of said spindle and serving to lock the collet in position within said bore, said collet being formed with a central longitudinal bore therein, a core drill having a tubular shank adapted for endwise projection into said longitudinal bore in the collet to a home position therein wherein the interior of the shank is in fluid communication with the axial bore in said bottom wall, cooperating detent means automatically effective between said shank and collet upon projection of the former into said bore for latching said shank within the bore when the shank reaches its home position, said detent means comprising an elastomeric O-ring which is confined in an internal annular recess in the wall of said tubular collet and, in addition, a cooperating external annular recess which is formed in the wall of the core drill shank and into which the O-ring projects when the shank is in its home position, and drive means effective between the collet and shank and likewise effective upon projection of the shank to its home position for transmitting torque from the spindle to the shank, said drive means comprising a drive pin which projects vertically and downwardly through an eccentrically disposed bore in the bottom wall of the socket, and also a notch which is formed in the upper end of the tubular shank and receives the drive pin when the shank is in its home position.
Claim 2
Dependent Claim
357 words
In combination, a drill press adapted for use in connection with a fluid-cooled core drill, said drill press comprising a shell, a quill slidable vertically in said shell, a hollow tubular spindle rotatably mounted within said quill for vertical endwise movements bodily with the quill, the lower end of said spindle being formed with a relatively deep frusto-conical socket having an upper wall portion which constitutes the bottom wall of the socket, said bottom wall of the socket being formed with a vertical axial bore therethrough establishing fluid communication between the socket and the interior of the spindle, a tubular frusto-conical collet of solid wall construction disposed within said socket with a taper fit, a bonnet nut threadedly received on the lower end of said spindle and serving to lock the collet in position within said bore, said collet being formed with a central longitudinal bore therein, a core drill having a tubular shank adapted for endwise projection into said longitudinal bore in the collet to a home position therein wherein the interior of the shank is in fluid communication with the axial bore in said bottom wall, cooperating detent means automatically effective between said shank and collet upon projection of the former into said bore for latching said shank within the bore when the shank reaches its home position, said detent means comprising an elastomeric O-ring which is confined in an internal annular recess in the wall of said tubular collet and, in addition, a cooperating external annular recess which is formed in the wall of the core drill shank and into which the O-ring projects when the shank is in its home position, and drive means effective between the collet and shank and likewise effective upon projection of the shank to its home position for transmitting torque from the spindle to the shank, said drive means comprising a drive pin which projects vertically and downwardly through an eccentrically disposed bore in the bottom wall of the socket, and also a notch which is formed in the upper end of the tubular shank and receives the drive pin when the shank is in its home position.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |