US4010543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hole cutting apparatus
Assignee: Individual
•
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 11:59
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.
References Cited (Backward Citations)
US158420A
Cited
US185902A
Cited
US511803A
Cited
US1270040A
Cited
US1277308A
Cited
US1774551A
Cited
US2402558A
Cited
US2708312A
Cited
US2990615A
Cited
CH434599A
Cited
US3335473A
Cited
US3639981A
Cited
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 |