US3625529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free running draw chuck
Assignee: United States Department of Health and Human Services
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Filing: 1970-03-05
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Granted: 1971-12-07
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Expires: 1990-03-05
Abstract
Abstract Free running draw chuck device for use in a lathe permitting rotation of an elongated, relatively fine workpiece or mandrel at high speeds under tension without deviation or ''''whipping.'''' Use of the device in formation of fine, wire reinforced catheters is shown.
Inventors
- 👤 James H Donachy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:55
CPC Classifications
B; B23; B23B; B23B23/00; B23B23/04; B23B25/00; B23B2233/00; B23B2233/16; Y; Y10; Y10T; Y10T279/00; Y10T279/35; Y10T82/00; Y10T82/25; Y10T82/2593
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
282 words
A free running draw chuck for use with a lathe having a rotatable headstock and a tailstock including a fixed tailstock spindle, comprising casing means having an interior surface defining a chamber, said casing means including a generally tubular portion and a front face portion on one end of said tubular portion, said front face portion defining a central aperture therethrough, a shaft member including a front end portion rotatably supported within said aperture and including terminal portions extending beyond said aperture to the exterior of said casing means, and a rear end portion located within said chamber in spaced relation to the interior of said front face portion of said casing means, transversely extending flange means on said rear end portion of said shaft member, said flange means being larger than said aperture and smaller than the interior of said tubular portion of said casing means, thrust bearing means within said chamber operatively positioned between the interior of said front face portion of said casing means and said flange means of said shaft member to support said shaft means for rotation relative to said casing means, means for securing said tubular portion of said casing means to the tailstock spindle of a lathe rearwardly of said flange means of said shaft member, and means for securing said terminal portions of said shaft member to a jaw means adapted to engage one end of a relatively thin, elongated element, the other end of which is rotatably carried by the headstock of the lathe, whereby the elongated element can be freely rotated relative to the fixed tailstock spindle of the lathe while maintained under tension between the rotatable headstock and the jaw means.
Claim 2
Dependent Claim
282 words
A free running draw chuck for use with a lathe having a rotatable headstock and a tailstock including a fixed tailstock spindle, comprising casing means having an interior surface defining a chamber, said casing means including a generally tubular portion and a front face portion on one end of said tubular portion, said front face portion defining a central aperture therethrough, a shaft member including a front end portion rotatably supported within said aperture and including terminal portions extending beyond said aperture to the exterior of said casing means, and a rear end portion located within said chamber in spaced relation to the interior of said front face portion of said casing means, transversely extending flange means on said rear end portion of said shaft member, said flange means being larger than said aperture and smaller than the interior of said tubular portion of said casing means, thrust bearing means within said chamber operatively positioned between the interior of said front face portion of said casing means and said flange means of said shaft member to support said shaft means for rotation relative to said casing means, means for securing said tubular portion of said casing means to the tailstock spindle of a lathe rearwardly of said flange means of said shaft member, and means for securing said terminal portions of said shaft member to a jaw means adapted to engage one end of a relatively thin, elongated element, the other end of which is rotatably carried by the headstock of the lathe, whereby the elongated element can be freely rotated relative to the fixed tailstock spindle of the lathe while maintained under tension between the rotatable headstock and the jaw means.
Claim 3
Dependent Claim
67 words
The free running draw chuck of claim 1 wherein said tubular portion of said casing means includes a shoulder defined in its interior rearwardly of said flange means of said shaft member, end cap means extending transversely across said chamber and including a front surface, edge portions of which abuttingly engage said shoulder, whereby said shoulder precludes said end cap means from moving forwardly within said chamber.
Claim 4
Dependent Claim
36 words
The free running draw chuck of claim 2 further including lubricating means within said chamber between the interior of said front face portion of said casing means and said front surface of said end cap means.
Claim 5
Dependent Claim
88 words
The free running draw chuck of claim 2 wherein said end cap means further includes peripheral portions tapered inwardly and rearwardly from said front surface thereof, and end cap setscrew means threadably secured in circumferentially spaced relation through said tubular portion of said casing means rearwardly of said shoulder, said end cap setscrew means having terminal portions engaging said tapered peripheral portions of said end cap means to urge said edge portions of said front surface of said end cap means forwardly into abutting engagement with said shoulder.
Claim 6
Dependent Claim
32 words
The free running draw chuck of claim 1 wherein said means for securing said terminal portions of said shaft member to a jaw means includes threaded means defined on said terminal portions.
Claim 7
Dependent Claim
108 words
The free running draw chuck of claim 1 wherein said means for securing said tubular portion of said casing means to the fixed tailstock spindle of a lathe includes tubular bushing means positioned rearwardly of said end cap means within said chamber, said bushing means being adapted to surroundingly engage the fixed tailstock spindle of a lathe, and tailstock spindle setscrew means threadably secured in circumferentially spaced relation through said tubular portion of said casing means, said tailstock spindle setscrew means having terminal portions engaging the exterior of said bushing means to press said bushing means into securing relationship with a tailstock spindle of a lathe surrounded thereby.
Claim 8
Dependent Claim
16 words
The free running draw chuck of claim 1, wherein said thrust bearing means includes ball bearings.
References Cited (Backward Citations)
SU118676A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |