US5581895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose knife with gut hook
Assignee: Individual
•
Filing: 1995-11-07
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Granted: 1996-12-10
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Expires: 2015-11-07
Abstract
Abstract An ergonomically-designed, multipurpose knife having a handle, a blade with a shank and a tip, and a fastener for attaching the handle to the shank. The blade has a curved outer edge extending substantially from the shank to the tip, with an integrally-formed gut hook positioned near the shank and opening toward the tip. A portion of the outer edge is sharpened to form a cutting edge. The fastener is user-operable for moving the blade from a first operating position where it opposes the handle to a second operating position where it extends forward of the handle for use as a hatchet. In the first position, force exerted on the handle and directed toward the blade is distributed approximately uniformly along the entire length of the outer cutting edge. Skinning cuts are made by grasping the handle and pivoting the wrist to produce controlled strokes approximately in the plane of the blade; chopping and slicing cuts are made by pivoting the wrist to rock the knife about an axis transverse to the plane of the blade. The user can control the length and direction of a cut by pivoting the wrist alone, the forearm at the elbow, the entire arm from the hand gripping the knife to the shoulder, or by pushing or pulling the knife with the hand and forearm, or any combination thereof. Range of motion, dexterity and control of the cutting edge are thereby improved, with greater comfort than is possible with a conventional knife.
Inventors
- 👤 Norman C. Jeffcoat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:14
CPC Classifications
B; B26; B26B; B26B11/00; B26B11/006; B26B1/00; B26B1/02; B26B27/00; B26B5/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
163 words
A knife, comprising: a handle; a blade having a shank, a tip, a curved inner edge, and a curved outer edge extending substantially from said shank to said tip, at least a portion of said outer edge being sharpened to form a cutting edge; means for attaching said shank to said handle so that said blade has a first selected position wherein said handle extends approximately over said inner edge, said handle being spaced apart from said inner edge to accommodate the hand of a user, said handle positioned in the plane of said blade so that force applied to said handle in the direction of said blade is distributed approximately uniformly along the length of said cutting edge, and a second selected position wherein said handle extends rearward of said blade, said attaching means operable by a user to move said blade between said first position and said second position; and a gut hook formed in said outer edge near said shank.
Claim 2
Dependent Claim
163 words
A knife, comprising: a handle; a blade having a shank, a tip, a curved inner edge, and a curved outer edge extending substantially from said shank to said tip, at least a portion of said outer edge being sharpened to form a cutting edge; means for attaching said shank to said handle so that said blade has a first selected position wherein said handle extends approximately over said inner edge, said handle being spaced apart from said inner edge to accommodate the hand of a user, said handle positioned in the plane of said blade so that force applied to said handle in the direction of said blade is distributed approximately uniformly along the length of said cutting edge, and a second selected position wherein said handle extends rearward of said blade, said attaching means operable by a user to move said blade between said first position and said second position; and a gut hook formed in said outer edge near said shank.
Claim 3
Dependent Claim
41 words
The knife as recited in claim 1, wherein said handle has a longitudinal axis, and wherein a chord connecting said shank and said tip forms an acute angle with said longitudinal axis when said blade is in said first selected position.
Claim 4
Dependent Claim
41 words
The knife as recited in claim 1, wherein said handle has a longitudinal axis, and wherein a chord connecting said shank and said tip forms an obtuse angle with said longitudinal axis when said blade is in said second selected position.
Claim 5
Dependent Claim
16 words
The knife as recited in claim 1, wherein a portion of said outer edge is serrated.
Claim 6
Dependent Claim
18 words
The knife as recited in claim 1, wherein said outer edge has an approximately constant radius of curvature.
Claim 7
Dependent Claim
87 words
A knife, comprising: a blade having a shank, a tip, an inner edge, and a curved outer edge extending substantially from said shank to said tip, at least a portion of said outer edge being sharpened to form a cutting edge; a gut hook formed in said outer edge near said shank, said gut hook opening in a direction away from said shank; and a handle attached to said shank so that said handle extends over said inner edge, said handle spaced apart from said inner edge.
Claim 8
Dependent Claim
87 words
A knife, comprising: a blade having a shank, a tip, an inner edge, and a curved outer edge extending substantially from said shank to said tip, at least a portion of said outer edge being sharpened to form a cutting edge; a gut hook formed in said outer edge near said shank, said gut hook opening in a direction away from said shank; and a handle attached to said shank so that said handle extends over said inner edge, said handle spaced apart from said inner edge.
Claim 9
Dependent Claim
18 words
The knife as recited in claim 6, wherein said outer edge has an approximately constant radius of curvature.
Claim 10
Dependent Claim
14 words
The knife as recited in claim 6, wherein said outer edge is approximately elliptical.
Claim 11
Dependent Claim
32 words
The knife as recited in claim 6, wherein said handle has a longitudinal axis, and wherein a chord between said shank and said tip forms an acute angle with said longitudinal axis.
Claim 12
Dependent Claim
36 words
The knife as recited in claim 6, wherein said handle has a longitudinal axis, and wherein a chord between said shank and said tip forms an angle no greater than approximately 45° with said longitudinal axis.
Claim 13
Dependent Claim
16 words
The knife as recited in claim 6, wherein a portion of said outer edge is serrated.
Claim 14
Dependent Claim
97 words
A knife, comprising: a handle; a curved blade attached to said handle, said blade having a shank, a tip, an inner edge, and an outer edge extending substantially from said shank to said tip, a portion of said outer edge being sharpened to form a cutting edge, said blade having a first position wherein said handle extends approximately over said inner edge, said handle being spaced apart from said inner edge, and a second position wherein said handle extends rearward of said blade; and means for changing said blade from said first position to said second position.
Claim 15
Dependent Claim
97 words
A knife, comprising: a handle; a curved blade attached to said handle, said blade having a shank, a tip, an inner edge, and an outer edge extending substantially from said shank to said tip, a portion of said outer edge being sharpened to form a cutting edge, said blade having a first position wherein said handle extends approximately over said inner edge, said handle being spaced apart from said inner edge, and a second position wherein said handle extends rearward of said blade; and means for changing said blade from said first position to said second position.
Claim 16
Dependent Claim
18 words
The knife as recited in claim 12, wherein said outer edge has an approximately constant radius of curvature.
Claim 17
Dependent Claim
40 words
The knife as recited in claim 12, wherein said handle has a longitudinal axis, and wherein a chord connecting said shank and said tip forms an acute angle with said longitudinal axis when said blade is in said first position.
Claim 18
Dependent Claim
40 words
The knife as recited in claim 12, wherein said handle has a longitudinal axis, and wherein a chord connecting said shank and said tip forms an obtuse angle with said longitudinal axis when said blade is in said second position.
Claim 19
Dependent Claim
44 words
The knife as recited in claim 12, wherein said handle has a longitudinal axis, and wherein a chord connecting said shank and said tip forms an angle no greater than approximately 45° with said longitudinal axis when said blade is in said first position.
Claim 20
Dependent Claim
17 words
The knife as recited in claim 12, further comprising a gut hook formed in said outer edge.
Claim 21
Dependent Claim
31 words
The knife as recited in claim 12, further comprising a gut hook formed in said outer edge near said shank, said gut hook opening in a direction away from said shank.
Claim 22
Dependent Claim
16 words
The knife as recited in claim 12, wherein a portion of said outer edge is serrated.
Claim 23
Dependent Claim
14 words
The knife as recited in claim 19, wherein said handle has an adjustable length.
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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) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |