US3751051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-change chuck with longitudinal compensation for thread-cutting tools
Assignee: Emuge Werk Richard Glimpel GmbH and Co KG Fabrik fuer Praezisionswerkzeuge
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Filing: 1971-09-14
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Granted: 1973-08-07
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Expires: 1991-09-14
Abstract
Abstract A quick-change chuck for thread-cutting tools or the like, having a shaft with an axial bore therein, and an axially movable tool-holding portion including a bolt extending into the axial bore of the shaft. A pair of axially aligned compression springs are disposed within the axial bore and engaging the interior of the shaft and the tool-holding portion. A pair of transverse washer-like stop members are provided, one secured to the interior of the bore and the other to the bolt, whereby one of the springs will be compressed under compression of the chuck and the other spring will be compressed under tension of the chuck, the non-affected spring in each case remaining unstressed.
Inventors
- 👤 W Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:10
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/107; B23B31/1071; B23B31/08; B23B31/083; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17017; Y10T408/00; Y10T408/94; Y10T408/95
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
A chuck having means for directly compensating for pushing and pulling forces applied thereto, comprising, in combination, an elongated shaft member including an axial bore opening into one end thereof and a bushing housing; a bushing member mounted for axial movement in said housing, including means for receiving a replaceable tool piece and an elongated bolt integrally connected thereto and extending axially within said shaft bore for relative reciprocable movement therein, the improvement in which said means for compensating for pushing and pulling forces comprising an abutment intermediately of and fixed relative to said shaft bore, said bolt having relative reciprocable movement with respect to said abutment; opposed, axial, lower and upper spring members circumposed about said bolt and having adjacent confronting ends engaging opposite sides of said abutment, the remote end of the lower spring member directly engaging on said bushing member, the remote end of said upper spring member abuttingly engaging said bolt above said fixed abutment, excessive axial pressure on said shaft member on said bushing member causing the lower spring abutting the bushing member to compress, and excessive tension on the shaft member, in an opposite direction, causes the upper spring member to compress in relation to said bolt whereby damage to the tool piece is obviated.
Claim 2
Dependent Claim
211 words
A chuck having means for directly compensating for pushing and pulling forces applied thereto, comprising, in combination, an elongated shaft member including an axial bore opening into one end thereof and a bushing housing; a bushing member mounted for axial movement in said housing, including means for receiving a replaceable tool piece and an elongated bolt integrally connected thereto and extending axially within said shaft bore for relative reciprocable movement therein, the improvement in which said means for compensating for pushing and pulling forces comprising an abutment intermediately of and fixed relative to said shaft bore, said bolt having relative reciprocable movement with respect to said abutment; opposed, axial, lower and upper spring members circumposed about said bolt and having adjacent confronting ends engaging opposite sides of said abutment, the remote end of the lower spring member directly engaging on said bushing member, the remote end of said upper spring member abuttingly engaging said bolt above said fixed abutment, excessive axial pressure on said shaft member on said bushing member causing the lower spring abutting the bushing member to compress, and excessive tension on the shaft member, in an opposite direction, causes the upper spring member to compress in relation to said bolt whereby damage to the tool piece is obviated.
Claim 3
Dependent Claim
57 words
The structure as claimed in claim 1 in which said bolt includes an intermediate abutment fixed thereto and reciprocable axially beyond both sides of the fixed abutment in the shaft member bore, and an abutment element engaged by the intermediate abutment fixed on said bolt when it moves beneath the fixed abutment in the shaft member bore.
Claim 4
Dependent Claim
50 words
The structure as claimed in claim 2 including an abutment element engaged between the lower end of said upper spring for engaging the upper surface of said fixed abutment and engaged by the intermediate abutment on said bolt when the intermediate abutment on the bolt moves above said fixed abutment.
Claim 5
Dependent Claim
40 words
The structure as claimed in claim 3 in which the abutment elements engaging the confronting ends of said springs substantially conform to the cross section of the shaft bore for guidingly engaging the shaft bore as the springs are compressed.
Claim 6
Dependent Claim
32 words
The structure as claimed in claim 1 in which said bolt includes a terminal head having a shoulder providing an abutment with which the remote end of said upper spring is engaged.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |