US3618962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collet chuck
Assignee: Santrade Ltd
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Filing: 1970-02-17
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Granted: 1971-11-09
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Expires: 1990-02-17
Abstract
Abstract A collet chuck having a radially movable pin therein for locking a tool such as an end mill against axial withdrawal from and turning in the collet. The pin is tapered and fits within a correspondingly tapered, radially extending hole in the collet which limits its inward movement. The pin is biased into full seating engagement with the tapered hole by a retaining spring and is adapted to be cammed radially outwardly during insertion of an end mill by a beveled end on the tool shank or by the flute contour in the case of a double ended end mill. With the collet in the chuck the inner end of the pin radially overlaps a shouldered recess on the shank of the tool and the outer end contacts the inner wall of the chuck. The pin thereby prevents axial withdrawal or turning of the tool.
Inventors
- 👤 John R Cox
- 👤 Joseph E Mix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:39
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/202; B23B2231/00; B23B2231/20; B23B2231/2005; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17811; Y10T279/17923; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A split radially resilient collet having a tapered outer surface, a tool-receiving bore extending axially therethrough and a tapered hole extending radially from the outer surface of said collet into said bore, said hole having its largest diameter adjacent said outer surface of the collet, a tool-locking pin tapered to fit said tapered hole and disposed therein, the length of said pin being such that when seated in said tapered hole in said collet the inner end of said pin extends into said axial bore and the outer end of said pin lies substantially at said outer tapered surface of said collet, and spring means supported on said collet and engaging said pin for biasing said pin into said hole while permitting limited radially outward movement of said pin.
Claim 2
Dependent Claim
129 words
A split radially resilient collet having a tapered outer surface, a tool-receiving bore extending axially therethrough and a tapered hole extending radially from the outer surface of said collet into said bore, said hole having its largest diameter adjacent said outer surface of the collet, a tool-locking pin tapered to fit said tapered hole and disposed therein, the length of said pin being such that when seated in said tapered hole in said collet the inner end of said pin extends into said axial bore and the outer end of said pin lies substantially at said outer tapered surface of said collet, and spring means supported on said collet and engaging said pin for biasing said pin into said hole while permitting limited radially outward movement of said pin.
Claim 3
Dependent Claim
48 words
A collet as defined in claim 1 which has a circumferential groove on its outer surface which intersects said hole at the outer end thereof and in which said spring means comprises a resilient split ring that fits within said groove and overlies said pin and said hole.
Claim 4
Dependent Claim
39 words
A collet as defined in claim 2 in which the outer end of said pin has a projection therein which forms an annular shoulder adjacent the outer end of said pin and said split ring overlies said annular shoulder.
Claim 5
Dependent Claim
166 words
In a chuck including a body having a bore, a collet arranged to be radially contracted when axially moved in said bore, and means on said body for axially moving said collet, the improvement which comprises said collet having a radially inwardly extending tapered hole, a correspondingly tapered pin mating with said hole, the inner end of said pin being adapted to overlap a recess on the shank of a tool in said collet to prevent withdrawal of the tool, the radially outer end of said pin having a projection thereon forming an annular shoulder on said pin, said projection being adapted to contact the wall of said bore in said body to prevent radially outward movement of said pin when said collet is in said bore, said collet having a circumferential groove that intersects said tapered hole, and a split spring ring in said groove overlying said shoulder and urging said pin into said hole while permitting radially outward movement and rotation of said pin.
Claim 6
Dependent Claim
166 words
In a chuck including a body having a bore, a collet arranged to be radially contracted when axially moved in said bore, and means on said body for axially moving said collet, the improvement which comprises said collet having a radially inwardly extending tapered hole, a correspondingly tapered pin mating with said hole, the inner end of said pin being adapted to overlap a recess on the shank of a tool in said collet to prevent withdrawal of the tool, the radially outer end of said pin having a projection thereon forming an annular shoulder on said pin, said projection being adapted to contact the wall of said bore in said body to prevent radially outward movement of said pin when said collet is in said bore, said collet having a circumferential groove that intersects said tapered hole, and a split spring ring in said groove overlying said shoulder and urging said pin into said hole while permitting radially outward movement and rotation of said pin.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |