Patent US3608915A successfully refreshed from Google Patents.
US3608915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating end stop for work-holding chuck
Assignee: NA Woodworth Co
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Filing: 1969-06-02
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Granted: 1971-09-28
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Expires: 1989-06-02
Abstract
Abstract A work-holding chuck having a novel end stop comprising front and rear beveled washers, the front washer being mounted for universal rocking movement on a spherically curved annular seating surface of the rear washer to adapt to the seating end of the workpiece and the rear washer being freely laterally shiftable to accommodate rocking of the front washer.
Inventors
- 👤 George Hohwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:48
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/40; B23B31/4006; B23B31/4033; Y; Y10; Y10T; Y10T279/00; Y10T279/34; Y10T279/3487; Y10T82/00; Y10T82/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
268 words
In a chuck of the type having a body provided with an axially extending, centrally disposed stationary chuck part and workholding means adapted to grip a workpiece with the axis of the work coincident with the axis of the work-holding means and to pull the same back axially in the direction of the body, means forming a radially extending annular surface on said chuck part behind said work-holding means and concentric to the latter; separate front and rear annular members interposed between said annular surface and said work-holding means independently movable relative to each other and also relative to said annular surface and to said work-holding means, annular members having opposed, mutually engaged, beveled seating surfaces and the beveled seating surface of at least one of said members being spherically curved; and resilient means interposed and compressed between and mutually cooperative with the stationary part of said chuck body and said front annular member holding the latter normally centered on said chuck and said rear member against said annular surface while permitting universal rocking movement of said front member on the seating surface of said rear member, said front member forming an end stop for a work piece gripped by said work-holding means and adapted to rock or tilt as required to flatly engage said workpiece and further to move essentially axially under clamping pressure as said workpiece is pulled back thereagainst by said work-holding means, said rear member having a flat rear surface seating on said annular surface and being laterally shiftable thereon as required to accommodate rocking and axial movement of said front end stop member.
Claim 2
Dependent Claim
268 words
In a chuck of the type having a body provided with an axially extending, centrally disposed stationary chuck part and workholding means adapted to grip a workpiece with the axis of the work coincident with the axis of the work-holding means and to pull the same back axially in the direction of the body, means forming a radially extending annular surface on said chuck part behind said work-holding means and concentric to the latter; separate front and rear annular members interposed between said annular surface and said work-holding means independently movable relative to each other and also relative to said annular surface and to said work-holding means, annular members having opposed, mutually engaged, beveled seating surfaces and the beveled seating surface of at least one of said members being spherically curved; and resilient means interposed and compressed between and mutually cooperative with the stationary part of said chuck body and said front annular member holding the latter normally centered on said chuck and said rear member against said annular surface while permitting universal rocking movement of said front member on the seating surface of said rear member, said front member forming an end stop for a work piece gripped by said work-holding means and adapted to rock or tilt as required to flatly engage said workpiece and further to move essentially axially under clamping pressure as said workpiece is pulled back thereagainst by said work-holding means, said rear member having a flat rear surface seating on said annular surface and being laterally shiftable thereon as required to accommodate rocking and axial movement of said front end stop member.
Claim 3
Dependent Claim
20 words
The combination as set forth in claim 1 wherein said spherically curved seating surface is on said rear annular member.
Claim 4
Dependent Claim
29 words
The combination as set forth in claim 1 wherein said resilient means is annular in form and is interposed radially between said chuck part and said front annular member.
Claim 5
Dependent Claim
33 words
The combination as set forth in claim 1 wherein said resilient means is in the form of an O-ring disposed between and radially compressed by said chuck part and said front annular member.
Claim 6
Dependent Claim
29 words
The combination as set forth in claim 1 wherein the beveled seating surface of said front and rear annular members are at a relatively steep angle of approximately 45*.
Claim 7
Dependent Claim
30 words
The combination as set forth in claim 1 wherein the seating surface of said front annular member extends radially inwardly substantially beyond the seating surface of said rear annular member.
Claim 8
Dependent Claim
169 words
In a chuck of the type having work-holding means adapted to clamp a workpiece and to pull the same axially back in the chuck, means forming a radially extending annular shoulder on said chuck behind and concentric to said work-holding means, an adjustable member on and shiftable laterally relative to said shoulder and having a beveled annular seating surface which is convexly curved transversely thereof; and means forming an end stop for work in the chuck adapted to seat the inner end of the work as the latter is clamped and pulled back in the chuck by said work-holding means, said end stop being supported for universal rocking or tilting movement on the annular spherically curved seating surface of said adjustable member, said end-stop-forming means rockably movable on said seating surface as required to flatly engage said workpiece and adapted to move primarily axially under clamping pressure, and said adjustable member being shiftable laterally on said shoulder as required to accommodate rocking and axial movement of said end-stop-forming means.
Claim 9
Dependent Claim
169 words
In a chuck of the type having work-holding means adapted to clamp a workpiece and to pull the same axially back in the chuck, means forming a radially extending annular shoulder on said chuck behind and concentric to said work-holding means, an adjustable member on and shiftable laterally relative to said shoulder and having a beveled annular seating surface which is convexly curved transversely thereof; and means forming an end stop for work in the chuck adapted to seat the inner end of the work as the latter is clamped and pulled back in the chuck by said work-holding means, said end stop being supported for universal rocking or tilting movement on the annular spherically curved seating surface of said adjustable member, said end-stop-forming means rockably movable on said seating surface as required to flatly engage said workpiece and adapted to move primarily axially under clamping pressure, and said adjustable member being shiftable laterally on said shoulder as required to accommodate rocking and axial movement of said end-stop-forming means.
Claim 10
Dependent Claim
36 words
The combination as set forth in claim 7 including an annular part on said chuck spaced radially from said end-stop-forming means, and an annular resilient element interposed and compressed between said part and said end-stop-forming means.
Claim 11
Dependent Claim
72 words
The combination as set forth in claim 8 wherein said end-stop-forming means is in the form of a ring and wherein said ring has an annular groove which receives and partially contains said resilient member, whereby the latter holds said ring against said adjustable member and seals the space between said ring and said chuck part and also protects the seating surface of said adjustable member from chips, dirt and the like.
Claim 12
Dependent Claim
88 words
The combination as set forth in claim 7, wherein said end-stop-forming means has an annular beveled recess which defines a surface that engages and is supported by said adjustable member, and wherein said adjustable member is substantially entirely received within the annular beveled groove of said end-stop-forming means, whereby said end-stop-forming means substantially entirely surrounds, shields and protects said adjustable member and the radial annular shoulder of the chuck on which said adjustable member is supported from chips, dust and the like coming off the work in use.
Claim 13
Dependent Claim
38 words
The combination as set forth in claim 8, wherein said annular resilient element is disposed essentially close to the surface of said end-stop-forming means against which the inner end of the work in the chuck seats in use.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |