US3694918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-cutting apparatus
Assignee: Individual
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Filing: 1971-10-20
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Granted: 1972-10-03
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Expires: 1991-10-20
Abstract
Abstract An apparatus for cutting sheet metal or the like under emergency conditions includes a bar having a pry surface and a cutting blade at one end thereof, and a cylinder reciprocably slidable thereon. In operation, the point of the cutting blade and the pry surface are rested on the sheet metal. The cylinder is extended, then slid in the direction of the point so as to drive the point through the sheet metal when the cylinder engages a corresponding stop on the bar. Cutting is then accomplished by rocking the bar, using the pry surface as a fulcrum.
Inventors
- 👤 Darrel E Bailey
- 👤 Earl M King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:01
CPC Classifications
B; B26; B26B; B26B27/00; B23; B23D; B23D29/00; B23D29/02; B23D29/026
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A metal-cutting apparatus comprising: a. an elongated bar having a pry surface at a first end thereof and including a stop means adjacent a second end thereof, b. a cutting blade affixed to said elongated bar adjacent said first end thereof, said cutting blade having a cutting surface separated from but extending substantially parallel to and facing said bar, and a point adjacent said cutting surface which is substantially co-planar with said pry surface of said bar, and c. an impact member reciprocal with said elongated bar which includes means for engaging said stop means at some point in reciprocation to thereby transmit an impulse to said elongated bar.
Claim 2
Dependent Claim
109 words
A metal-cutting apparatus comprising: a. an elongated bar having a pry surface at a first end thereof and including a stop means adjacent a second end thereof, b. a cutting blade affixed to said elongated bar adjacent said first end thereof, said cutting blade having a cutting surface separated from but extending substantially parallel to and facing said bar, and a point adjacent said cutting surface which is substantially co-planar with said pry surface of said bar, and c. an impact member reciprocal with said elongated bar which includes means for engaging said stop means at some point in reciprocation to thereby transmit an impulse to said elongated bar.
Claim 3
Dependent Claim
26 words
An apparatus as recited in claim 1, wherein said cutting blade includes a second cutting surface extending from said first cutting surface to said point thereof.
Claim 4
Dependent Claim
29 words
An apparatus as recited in claim 2, wherein said cutting blade includes a third cutting surface extending substantially at a right angle from said cutting surface to said bar.
Claim 5
Dependent Claim
52 words
An apparatus as recited in claim 1, wherein said impact member comprises a hollow member slidable on said bar, and wherein said engaging means of said impact member comprises a solid member closing a lower end of said hollow member, and said stop means on said bar comprises said second end thereof.
Claim 6
Dependent Claim
77 words
An apparatus as recited in claim 4, wherein said bar further includes an enlarged portion thereof between said first anD second ends, and said impact member further includes a coupling member for closing the upper end of said hollow member, said coupling member defining an aperture therein for the passage of said bar and including means for engaging said enlarged portion thereof so as to limit the extension of said bar relative to said said impact member.
Claim 7
Dependent Claim
26 words
An apparatus as recited in claim 5, wherein said bar, said hollow member, said stop means, said engaging means and said coupling member are substantially cylindrical.
Claim 8
Dependent Claim
31 words
An apparatus as recited in claim 1, wherein said cutting blade is composed of a sheet of spring steel which is relatively thin with respect to the thickness of said bar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |