US3822790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool-holding devices
Assignee: INTERTEC LE QUINTIN A CORP OF FRANCE Ste
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Filing: 1972-09-05
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Granted: 1974-07-09
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Expires: 1992-09-05
Abstract
Abstract A tool-holder has a housing with an inner tapered bore in which a correspondingly tapered resilient collet is axially movable, the tool being gripped inside the collet. Axial movement of the collet is limited by a bead on the housing bore fitting loosely in a groove in the collet. When the tool is inserted in the toolholder the collet is moved towards the wider part of the bore, allowing easy insertion, but withdrawal of the tool causes movement in the opposite direction, producing a limited increase in the grip on the tool.
Inventors
- 👤 R Rodney
- 👤 A Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:58
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/155; B23Q3/1552; B23Q3/15526; F; F16; F16B; F16B9/00; F16B9/05; F16B9/052; F16B9/056; F16B2200/00; F16B2200/50; F16B2200/503; F16B2200/509; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3439; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17136; Y10T279/17153; Y10T279/17411; Y10T279/17418; Y10T279/17427; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7058
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
In combination, a tool holder for mounting in a support and a rotary cutting tool stored in said tool holder, said rotary cutting tool including a cylindrical holdable portion, said tool holder comprising a resilient collet having a relaxed internal diameter smaller than the diameter of the holdable portion of the tool so as to grip said portion, a housing fixed in said support having a bore tapering inwardly towards a narrow tool-receiving end in which said collet is freely mounted for axial movement so that the collet is radially compressed when so moving axially towards the narrow end of the bore, and means on said collet and said housing limiting said axial movement of the collet, said tool being inserted and withdrawn from said narrow end, and the grip exerted on said tool by said collet at the wide end of the bore being sufficient to produce said limited axial movement of said collet upon withdrawal of said tool, whereby said collet becomes radially compressed and increases its grip on said tool.
Claim 2
Dependent Claim
173 words
In combination, a tool holder for mounting in a support and a rotary cutting tool stored in said tool holder, said rotary cutting tool including a cylindrical holdable portion, said tool holder comprising a resilient collet having a relaxed internal diameter smaller than the diameter of the holdable portion of the tool so as to grip said portion, a housing fixed in said support having a bore tapering inwardly towards a narrow tool-receiving end in which said collet is freely mounted for axial movement so that the collet is radially compressed when so moving axially towards the narrow end of the bore, and means on said collet and said housing limiting said axial movement of the collet, said tool being inserted and withdrawn from said narrow end, and the grip exerted on said tool by said collet at the wide end of the bore being sufficient to produce said limited axial movement of said collet upon withdrawal of said tool, whereby said collet becomes radially compressed and increases its grip on said tool.
Claim 3
Dependent Claim
52 words
The combination according to claim 1 wherein the means limiting said movement of the collet comprises an annular bead formed on the narrow end of the bore of the housing and an annular groove in the collet to surround the bead and of a width greater than the width of the bead.
Claim 4
Dependent Claim
32 words
The combination according to claim 1 wherein the end of the collet adjacent the wide end of the bore is formed with an internal shoulder against which the tool inserted therein abuts.
Claim 5
Dependent Claim
24 words
The combination according to claim 3 wherein at least said end of the collet is radially slotted to increase the resilience of the collet.
Claim 6
Dependent Claim
16 words
The combination according to claim 1 wherein the collet is made of a glass-filled nylon material.
References Cited (Backward Citations)
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US2123791A
Cited
US2615644A
Cited
US3253136A
Cited
FR1380227A
Cited
GB1021787A
Cited
US3604565A
Cited
US3661050A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |