US4761844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined hole making and threading tool
Assignee: Individual
•
Filing: 1987-01-27
•
Granted: 1988-08-09
•
Expires: 2007-01-27
Abstract
Abstract A combination tool is disclosed for drilling a hole in a workpiece on the inward feed of the tool and for threading the hole during retraction of the tool. The tool comprises a straight body with a drill point at the forward end, a shank at the rearward end and a thread-form mill between the drill point and the shank.
Inventors
- 👤 Manuel C. Turchan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:09
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/08; B23G; B23G1/00; B23G1/32; B23G1/34; B23G5/00; B23G5/18; B23G5/182; B23G5/184; B23G2200/00; B23G2200/14; B23G2200/143; B23G2240/00; B23G2240/12; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9048; Y10T409/00; Y10T409/30; Y10T409/300056; Y10T409/30056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
For use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move the cutting tool axially, and move the axis in an orbital path whereby a point on the axis of the cutting tool may be moved to define a rectilinear path or a helical path, a tool comprising: a body having a shank at one end, a hole making means at the other end and a thread making means intermediate said ends, and at least one chip removal passage extending from said hole making means through said thread making means, said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter the hole made by the hole making means without interference.
Claim 2
Dependent Claim
136 words
For use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move the cutting tool axially, and move the axis in an orbital path whereby a point on the axis of the cutting tool may be moved to define a rectilinear path or a helical path, a tool comprising: a body having a shank at one end, a hole making means at the other end and a thread making means intermediate said ends, and at least one chip removal passage extending from said hole making means through said thread making means, said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter the hole made by the hole making means without interference.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1 wherein said hole making means comprises a drill point and said thread making means comprises a thread-form mill.
Claim 4
Dependent Claim
25 words
The invention as defined in claim 1 wherein said hole making means comprises an end mill and said thread making means comprises a thread-form mill.
Claim 5
Dependent Claim
21 words
The invention as defined in claim 1 including: a chamfer cutting bit disposed between said thread making means and said shank.
Claim 6
Dependent Claim
16 words
The invention as defined in claim 2 wherein said drill point is a hollow drill point.
Claim 7
Dependent Claim
28 words
The invention as defined in claim 2 wherein said drill point defines a recess between the cutting edges thereof and centered on the rotational axis of said tool.
Claim 8
Dependent Claim
51 words
The invention as defined in claim 1 including a main fluid passage extending through the shank and said thread making means to a point adjacent said hole making means, and a branch passage extending from said main passage to the surface of each chip removal passage adjacent said hole making means.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |