Patent US3861246A successfully refreshed from Google Patents.
US3861246A
Expired / Lapsed
US
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Sharpening device
Assignee: Wiltshire Consolidated Ltd
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Filing: 1974-03-21
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Granted: 1975-01-21
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Expires: 1994-03-21
Abstract
Abstract A blade sharpening device comprising two overlappimg plate-like elements, each defining a respective sharpening edge and being arranged so that a substantially V-shaped sharpening recess is defined between the two sharpening edges. Each plate is individually mounted on a support structure by a pivot means arranged so that the two plates can swing relative to each other and relative to the support structure. The axes of the two pivots are disposed on opposite sides respectively of the sharpening recess and may be substantially parallel to one another or substantially parallel to the sharpening edge of the respective plates. In particular, the pivotal axes are arranged so that the angular relationship between adjacent faces of the two plates varies in accordance with a change in the relative pivotal positions of those plates.
Inventors
- 👤 Campbell E Waller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:30
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/06; B24D15/08; B24D15/081
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
A blade sharpening device including two sharpening elements each defining a respective sharpening edge, said elements being arranged in overlapping relationship so that said sharpening edges define a sharpening recess between them, and pivot means connecting each said element to a support structure to permit each said element to move relative to the other, the axis of each said pivot means extending in a direction such that the angular relationship between adjacent surfaces of said overlapping elements varies according to the relative pivotal positions of said elements.
Claim 2
Dependent Claim
87 words
A blade sharpening device including two sharpening elements each defining a respective sharpening edge, said elements being arranged in overlapping relationship so that said sharpening edges define a sharpening recess between them, and pivot means connecting each said element to a support structure to permit each said element to move relative to the other, the axis of each said pivot means extending in a direction such that the angular relationship between adjacent surfaces of said overlapping elements varies according to the relative pivotal positions of said elements.
Claim 3
Dependent Claim
94 words
A blade sharpening device including at least two sharpening plates each defining a respective sharpening edge, said plates being arranged in overlapping relationship with said sharpening edges extending angularly relative to each other so that a sharpening recess is defined between said edges, pivot means connecting each said plate independently of the other to a support structure to permit relative movement of said plates, the axis of each said pivot means extending substantially parallel of a plane containing said recess, and each said axis being located on a respective opposite side of said recess.
Claim 4
Dependent Claim
94 words
A blade sharpening device including at least two sharpening plates each defining a respective sharpening edge, said plates being arranged in overlapping relationship with said sharpening edges extending angularly relative to each other so that a sharpening recess is defined between said edges, pivot means connecting each said plate independently of the other to a support structure to permit relative movement of said plates, the axis of each said pivot means extending substantially parallel of a plane containing said recess, and each said axis being located on a respective opposite side of said recess.
Claim 5
Dependent Claim
19 words
A device according to claim 1, wherein the axes of said pivot means extend substantially parallel to each other.
Claim 6
Dependent Claim
31 words
A device according to claim 1, wherein the axis of each said pivot means extends substantially parallel to the general direction of the sharpening edge of its respective said sharpening element.
Claim 7
Dependent Claim
29 words
A device according to claim 1, wherein stop means is provided on each side of said sharpening elements to limit the degree of movement thereof about said pivot means.
Claim 8
Dependent Claim
21 words
A device according to claim 1, wherein biasing means acts on each said element to urge it into a rest position.
Claim 9
Dependent Claim
124 words
A knife scabbard including, a housing having a knife receiving passage defined therein; an access opening at one end of said passage; and a sharpening device mounted within said passage adjacent said opening; said sharpening device including, a blade sharpening device including two sharpening elements each defining a respective sharpening edge, said elements being arranged in overlapping relationship so that said sharpening edges define a sharpening recess between them, and pivot means connecting each said element to a support structure to permit each said element to move relative to the other, the axis of each said pivot means extending in a direction such that the angular relationship between adjacent surfaces of said overlapping elements varies according to the relative pivotal positions of said elements.
Claim 10
Dependent Claim
124 words
A knife scabbard including, a housing having a knife receiving passage defined therein; an access opening at one end of said passage; and a sharpening device mounted within said passage adjacent said opening; said sharpening device including, a blade sharpening device including two sharpening elements each defining a respective sharpening edge, said elements being arranged in overlapping relationship so that said sharpening edges define a sharpening recess between them, and pivot means connecting each said element to a support structure to permit each said element to move relative to the other, the axis of each said pivot means extending in a direction such that the angular relationship between adjacent surfaces of said overlapping elements varies according to the relative pivotal positions of said elements.
Claim 11
Dependent Claim
132 words
A knife scabbard including, a housing having a knife receiving passage defined therein; an access opening at one end of said passage; and a sharpening device mounted within the said passage adjacent said opening; said sharpening device including, a blade sharpening device including at least two sharpening plates each defining a respective sharpening edge, said plates being arranged in overlapping relationship with said sharpening edges extending angularly relative to each other so that a sharpening recess is defined between said edges, pivot means connecting each said plate independently of the other to a support structure to permit relative movement of said plates, the axis of each said pivot means extending substantially parallel of a plane containing said recess, and each said axis being located on a respective opposite side of said recess.
Claim 12
Dependent Claim
132 words
A knife scabbard including, a housing having a knife receiving passage defined therein; an access opening at one end of said passage; and a sharpening device mounted within the said passage adjacent said opening; said sharpening device including, a blade sharpening device including at least two sharpening plates each defining a respective sharpening edge, said plates being arranged in overlapping relationship with said sharpening edges extending angularly relative to each other so that a sharpening recess is defined between said edges, pivot means connecting each said plate independently of the other to a support structure to permit relative movement of said plates, the axis of each said pivot means extending substantially parallel of a plane containing said recess, and each said axis being located on a respective opposite side of said recess.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |