Patent US3678632A successfully refreshed from Google Patents.
US3678632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quill for machine tools
Assignee: Kennametal Inc
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Filing: 1969-11-26
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Granted: 1972-07-25
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Expires: 1989-11-26
Abstract
Abstract The invention discloses a quill arrangement for a machine tool in which the machine end of the quill is formed of steel and the tool end of the quill is formed of a cemented metal carbide having a high degree of stiffness relative to steel.
Inventors
- 👤 William C Eversole
- 👤 James W Heaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:53
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/04; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/453; Y10T408/78; Y10T408/94; Y10T408/95; Y10T408/957; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/30952
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
In a machine tool quill; a rod-like steel member adapted at one end of connection to a machine tool spindle for being driven in rotation thereby with the other end of said member exposed and projecting from the spindle, a central axial bore in said other end of said steel member on the axis of rotation of said member, and a round rod of cementEd metal carbide substantially smaller in diameter than said steel member having one end extending a substantial distance into said bore in closely fitting relation thereto and fixed in said bore, said rod projecting axially from said other end of said member and coaxial with the axis of rotation thereof, said rod including means at its outer free end for supporting connection thereof to a metal working tool.
Claim 2
Dependent Claim
132 words
In a machine tool quill; a rod-like steel member adapted at one end of connection to a machine tool spindle for being driven in rotation thereby with the other end of said member exposed and projecting from the spindle, a central axial bore in said other end of said steel member on the axis of rotation of said member, and a round rod of cementEd metal carbide substantially smaller in diameter than said steel member having one end extending a substantial distance into said bore in closely fitting relation thereto and fixed in said bore, said rod projecting axially from said other end of said member and coaxial with the axis of rotation thereof, said rod including means at its outer free end for supporting connection thereof to a metal working tool.
Claim 3
Dependent Claim
18 words
A machine tool quill according to claim 1 in which said cemented metal carbide is cemented tungsten carbide.
Claim 4
Dependent Claim
42 words
A machine tool quill according to claim 2 in which the ratio for the diameter of said rod to the length thereof projecting from said steel member is on the order of from about 1 to 7 to about 1 to 9.
Claim 5
Dependent Claim
29 words
A machine tool quill according to claim 3 in which said one end of said rod is shrink fitted in the said central axial bore in said steel member.
Claim 6
Dependent Claim
30 words
A machine tool quill according to claim 1 in which the said means at the outer free end of said rod includes a central axially extending recess in the rod.
Claim 7
Dependent Claim
26 words
A machine tool quill according to claim 5 which includes a bushing of machinable material fixedly secured in the said axially extending recess in said rod.
Claim 8
Dependent Claim
30 words
A machine tool quill according to claim 1 in which said steel member is cylindrical and of such a size as to permit machining thereof to fit various spindle tapers.
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |