US4170343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife sharpener
Assignee: Individual
•
Filing: 1978-08-03
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Granted: 1979-10-09
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Expires: 1998-08-03
Abstract
Abstract A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, having two plate-like relatively long narrow clamp members each with one end having a bevel on only one side and pivotally connected by a countersunk head screw to one another adjacent to their bevelled ends with their bevelled sides facing away from one another, a thumb screw threaded in a tapped aperture in one of the clamp members intermediate the pivotal connection of the members to one another and the ends of the clamp members remote from the previously mentioned bevelled ends with its non-headed end engaging the other clamp member for forcing the bevelled ends of the clamp member towards one another, and movable projections of equal length in the form of eye bolts extending a substantial distance from the sides of the clamp members adjacent to their ends other than the aforementioned bevelled ends thereof.
Inventors
- 👤 Howard R. Longbrake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:44
CPC Classifications
B; B25; B25B; B25B9/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, comprising two clamp members having opposed planar surfaces and a bevel on the opposite side of each member at one end thereof, means pivotally connecting said clamp members to one another with their bevelled ends adjacent to one another, means for forcing the bevelled ends of said clamp member towards one another, and a member connected to each clamp member and projecting a substantial distance from said bevelled sides of said clamp members adjacent to the ends of said clamp members other than said bevelled ends thereof.
Claim 2
Dependent Claim
139 words
A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, comprising two clamp members having opposed planar surfaces and a bevel on the opposite side of each member at one end thereof, means pivotally connecting said clamp members to one another with their bevelled ends adjacent to one another, means for forcing the bevelled ends of said clamp member towards one another, and a member connected to each clamp member and projecting a substantial distance from said bevelled sides of said clamp members adjacent to the ends of said clamp members other than said bevelled ends thereof.
Claim 3
Dependent Claim
155 words
A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, comprising two plate-like relatively long narrow clamp members facing one another and each having two adjacent ends bevelled on their non-facing sides, means pivotally connecting said clamp members to one another adjacent to their said bevelled ends, means intermediate said first mentioned means and the ends of said clamp members other than said bevelled ends thereof for forcing said bevelled ends of said clamp member towards one another, and a member connected to each clamp member and projecting a substantial distance from said bevelled sides of said clamp members adjacent to the ends of said clamp members other than said bevelled ends thereof.
Claim 4
Dependent Claim
155 words
A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, comprising two plate-like relatively long narrow clamp members facing one another and each having two adjacent ends bevelled on their non-facing sides, means pivotally connecting said clamp members to one another adjacent to their said bevelled ends, means intermediate said first mentioned means and the ends of said clamp members other than said bevelled ends thereof for forcing said bevelled ends of said clamp member towards one another, and a member connected to each clamp member and projecting a substantial distance from said bevelled sides of said clamp members adjacent to the ends of said clamp members other than said bevelled ends thereof.
Claim 5
Dependent Claim
39 words
A work holder as claimed in claims 1 or 2 wherein the extension of one or both of said members projecting from the clamp members adjacent to the ends thereof other than the said bevelled ends thereof is adjustable.
Claim 6
Dependent Claim
58 words
A work holder as claimed in claims 1, 2 or 3 in which the said bevelled ends of the clamp members are provided with shallow apertures in the sides of the clamp members facing one another which apertures have surfaces facing one another diverging from one another in the direction away from said end of the clamp members.
References Cited (Backward Citations)
US3819170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |