Patent US3639982A successfully refreshed from Google Patents.
US3639982A
Expired / Lapsed
US
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Mortise groove knife
Assignee: Individual
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Filing: 1969-01-06
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Granted: 1972-02-08
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Expires: 1989-01-06
Abstract
Abstract This invention is concerned with a mortise knife. More specifically, this invention is concerned with a mortise groove knife which is capable of cutting an elongated slot in porous materials which incorporate a skin. The knife of this invention generally comprises an elongated channel which is attached to a flat guide section wherein the width of said channel generally increases as the distance from the cutting edge increases.
Inventors
- 👤 John E O'neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:52
CPC Classifications
B; B26; B26B; B26B3/00; B26B3/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A mortise groove-cutting knife comprising: a handle, an elongated flat base guideblade connected to said handle, and an elongated channel blade attached to said guideblade and wherein the width of said channel blade is less than the width of said guideblade, and the leading edges of said elongated channel blade and base guideblade are sharpened.
Claim 2
Dependent Claim
55 words
A mortise groove-cutting knife comprising: a handle, an elongated flat base guideblade connected to said handle, and an elongated channel blade attached to said guideblade and wherein the width of said channel blade is less than the width of said guideblade, and the leading edges of said elongated channel blade and base guideblade are sharpened.
Claim 3
Dependent Claim
29 words
The mortise groove-cutting knife of claim 1 wherein the leading edge of said elongated channel blade is positioned slightly back from the leading edge of said flat base blade.
Claim 4
Dependent Claim
18 words
The mortise groove-cutting knife of claim 1 wherein attached to one end of said knife is said handle.
Claim 5
Dependent Claim
78 words
The mortise groove-cutting knife of claim 1 wherein said channel blade has a U-shaped cross section and a transverse internal dimension of said channel blade increases as the distance from the leading edge of said channel blade increases, wherein the width of said U-shaped channel blade is approximately one-half the width of said elongated flat base blade and the leading edge of said channel blade is inclined at an angle of approximately 45* relative to said base blade.
Claim 6
Dependent Claim
48 words
The mortise groove-cutting knife of claim 1 wherein said channel blade has a U-shaped cross section and the internal width of the channel blade is substantially less than the width of said base blade and increases as the distance from the leading edge of said channel blade increases.
Claim 7
Dependent Claim
37 words
The mortise groove-cutting knife of claim 2 wherein said channel blade has a U-shaped cross section and the internal width of the channel blade increases as the distance from the leading edge of said channel blade increases.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |