Patent US4010543A successfully refreshed from Google Patents.
US4010543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hole cutting apparatus
Assignee: Individual
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Filing: 1975-10-28
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Granted: 1977-03-08
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Expires: 1995-10-28
Abstract
Abstract A hole cutting apparatus which can be utilized to make holes in material which is of a tacky nature, including a hollow tube whose bottom edge is both chamfered and also cut at an angle with respect to the longitudinal axis of the tube. A knob is coupled to the top of the tube to form a handle. A hole in the top of the knob prevents a vacuum from being formed in the tube and also permits easy removal of the portion cut.
Inventors
- 👤 Max J. Nusbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A hole cutting apparatus comprising, a hollow tube having a top and bottom end, said bottom end being chamfered on the outer surface completely around the circumference thereof and being cut at a shallow angle with respect to a plane transverse to the longitudinal axis of the tube to form a cutting edge, said cut of said bottom end being less than the angle of the chamfer, whereby one portion of the bottom end has a greater chamfer than the rest of the bottom end, and a knob coupled to the top end of the tube to form a handle.
Claim 2
Dependent Claim
100 words
A hole cutting apparatus comprising, a hollow tube having a top and bottom end, said bottom end being chamfered on the outer surface completely around the circumference thereof and being cut at a shallow angle with respect to a plane transverse to the longitudinal axis of the tube to form a cutting edge, said cut of said bottom end being less than the angle of the chamfer, whereby one portion of the bottom end has a greater chamfer than the rest of the bottom end, and a knob coupled to the top end of the tube to form a handle.
Claim 3
Dependent Claim
17 words
A hole cutting apparatus as in claim 1 and wherein said knob is of a hemispherical shape.
Claim 4
Dependent Claim
30 words
A hole cutting apparatus as in claim 2 and wherein said knob includes a hole formed in the approximate center thereof and positioned over the hollow portion of said tube.
Claim 5
Dependent Claim
20 words
A hole cutting apparatus as in claim 1 and wherein said tube and said knob are of stainless steel material.
Claim 6
Dependent Claim
16 words
A hole cutting apparatus as in claim 4 and wherein said stainless material has been electropolished.
Claim 7
Dependent Claim
51 words
A hole cutting apparatus as in claim 1 and further comprising support means for retaining the material being cut, said support means cooperating with said cutting edge during the cutting of the material for providing a penetratable substance in which the cutting edge can enter after the cutting of the material.
Claim 8
Dependent Claim
18 words
A hole cutting apparatus as in claim 6 and wherein said support means is of a plastic material.
Claim 9
Dependent Claim
145 words
A hole cutting apparatus comprising, in combination: a tool including a hollow tube having a top and bottom end, said bottom end being chamfered on the outer surface completely around the circumference thereof and being cut at an angle with respect to a plane transverse to the longitudinal axis of the tube to form a cutting edge, said cut of said bottom end being less than the angle of the chamfer whereby one portion of the bottom end has a greater chamfer than the rest of the bottom end, and a knob coupled to the top end of the tube for forming a handle; and a support plate for retaining the article being cut, said support plate cooperating with said cutting edge during the cutting of the material by providing a penetratable surface in which the cutting edge can enter after cutting of the material.
Claim 10
Dependent Claim
145 words
A hole cutting apparatus comprising, in combination: a tool including a hollow tube having a top and bottom end, said bottom end being chamfered on the outer surface completely around the circumference thereof and being cut at an angle with respect to a plane transverse to the longitudinal axis of the tube to form a cutting edge, said cut of said bottom end being less than the angle of the chamfer whereby one portion of the bottom end has a greater chamfer than the rest of the bottom end, and a knob coupled to the top end of the tube for forming a handle; and a support plate for retaining the article being cut, said support plate cooperating with said cutting edge during the cutting of the material by providing a penetratable surface in which the cutting edge can enter after cutting of the material.
Claim 11
Dependent Claim
26 words
A hole cutting apparatus as in claim 8 and wherein said knob includes a hole formed therein and positioned over the hollow portion of said tube.
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |