Patent US3575520A successfully refreshed from Google Patents.
US3575520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutting tool and auxiliary tool element and means for interconnecting same
Assignee: Individual
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Filing: 1969-04-15
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Granted: 1971-04-20
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Expires: 1989-04-15
Abstract
Abstract A tool is disclosed for drilling a hole, and as an adjunct thereto for performing an additional function such as chamfering or deburring. The tool is formed by a standard drill or reamer and an auxiliary tool element which may be adjusted to act when the drill or reamer has reached a predetermined depth in the workpiece. A special locking arrangement is provided for securing the auxiliary tool in the adjusted position. The auxiliary tool also performs the very important additional function of supporting and guiding the drill through a drill jig bushing.
Inventors
- 👤 William Halpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:34
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/108; B23B51/1085; B23B51/08; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/87; Y10T408/8725; Y10T408/89; Y10T408/905; Y10T408/906; Y10T408/9065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
The combination of, a rotary twist drill of the type having a spiral flute and adjacent land surfaces along its axis and having a substantially uniform transverse configuration, an auxiliary tool surrounding said drill and adapted to be moved axially along the flute to a selected position to perform an additional function upon the workpiece as an adjunct to the function produced by said drill, said auxiliary tool having attaching means and tool means integral therewith, said attaching meaNs comprising an integral body portion surrounding said rotary drill and having an integral bore of a radius which is slightly greater than the radius of the margins of said rotary drill, said body portion having a slot extending between said bore and the outer surface and being sufficiently flexible to permit the body portion to be clamped against the margins of the drill, a pair of clamping screws threaded in bores transverse to said slot whereby the tightening of said screws clamps said body portion against the margin surfaces of said drill, said tool means having an internal bore of a radius which is slightly greater than the radius of the lands of said drill whereby the tightening of said screws presses the surfaces of the last-named bore against the adjacent land surfaces of the drill.
Claim 2
Dependent Claim
215 words
The combination of, a rotary twist drill of the type having a spiral flute and adjacent land surfaces along its axis and having a substantially uniform transverse configuration, an auxiliary tool surrounding said drill and adapted to be moved axially along the flute to a selected position to perform an additional function upon the workpiece as an adjunct to the function produced by said drill, said auxiliary tool having attaching means and tool means integral therewith, said attaching meaNs comprising an integral body portion surrounding said rotary drill and having an integral bore of a radius which is slightly greater than the radius of the margins of said rotary drill, said body portion having a slot extending between said bore and the outer surface and being sufficiently flexible to permit the body portion to be clamped against the margins of the drill, a pair of clamping screws threaded in bores transverse to said slot whereby the tightening of said screws clamps said body portion against the margin surfaces of said drill, said tool means having an internal bore of a radius which is slightly greater than the radius of the lands of said drill whereby the tightening of said screws presses the surfaces of the last-named bore against the adjacent land surfaces of the drill.
Claim 3
Dependent Claim
50 words
The combination described in claim 1 wherein said tool means comprises a chamfering lip having a spiral cutting edge which is positioned in trailing relationship to a margin of said drill and said surfaces of said last-named bore are positioned tightly against said lands radially inwardly from said cutting edge.
Claim 4
Dependent Claim
32 words
The combination as described in claim 2 wherein said body member has a flexible web in general alignment with said slot and upon the opposite side of the axis of said drill.
Claim 5
Dependent Claim
22 words
The combination described in claim 3 wherein said web is formed by a groove in the outer wall of said body member.
Claim 6
Dependent Claim
36 words
The combination as described in claim 1 wherein said body portion presents guiding surfaces when clamped to said drill which are along a true cylindrical surface having its axis coincident with the axis of said drill.
Claim 7
Dependent Claim
124 words
A chamfering tool for use with a rotating cutting tool which comprises a body portion having a central bore which is of a diameter slightly greater than the maximum diameter of the cutting tool with which it is to be used and having a rectangular slot extending between said bore and an outer side surface of said body portion, a pair of clamping screws bridging said slot transversely thereof and adapted to be tightened to clamp said body portion against the outer surfaces of the cutting tool, and a chamfering portion integral with said body portion and having a bore of slightly lesser radius than that of the first-named bore, said last-named bore presenting surfaces which engage the opposite side surfaces of a drill.
Claim 8
Dependent Claim
124 words
A chamfering tool for use with a rotating cutting tool which comprises a body portion having a central bore which is of a diameter slightly greater than the maximum diameter of the cutting tool with which it is to be used and having a rectangular slot extending between said bore and an outer side surface of said body portion, a pair of clamping screws bridging said slot transversely thereof and adapted to be tightened to clamp said body portion against the outer surfaces of the cutting tool, and a chamfering portion integral with said body portion and having a bore of slightly lesser radius than that of the first-named bore, said last-named bore presenting surfaces which engage the opposite side surfaces of a drill.
Claim 9
Dependent Claim
29 words
A chamfering tool as described in claim 6 wherein said chamfering portion has a chamfering lip which is in trailing relationship with respect to the plane of said slot.
Claim 10
Dependent Claim
34 words
A chamfering tool as described in claim 6 wherein said body portion is formed by two half-portions and an interconnecting web positioned at the side of the axis of said bores opposite said slot.
Claim 11
Dependent Claim
42 words
A chamfering tool as described in claim 6 for use with a cutting tool which is a twist drill having two spiral lands and wherein said chamfering portion has bore surfaces which rest respectively upon the clearance diameter surfaces of said lands.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |