Patent US3733751A successfully refreshed from Google Patents.
US3733751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for sharpening small hand tools
Assignee: TEMTOOL Pty Ltd
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Filing: 1971-05-06
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Granted: 1973-05-22
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Expires: 1991-05-06
Abstract
Abstract A grinder for tool blades having spaced coaxial grinding and stropping wheels, the stropping wheel being of smaller diameter than the grinding wheel, and a tool carrier movable along an axis parallel to the axes of the wheels. The angle made by a blade with the stropping wheel is greater than that made with the grinding wheel to remove the burr from the blade and provide a sharp edge thereon.
Inventors
- 👤 P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:42
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A grinder for sharpening tool blades which includes a grinding means and a stropping means, means to drive the grinding means and stropping means, a tool carrier movable transversely relative to the grinding means and the stropping means, the stropping means being located from the tool carrier by a distance greater than the grinding means, and means mounting the tool carrier for pivotal movement about an axis parallel to its direction of transverse movement whereby a blade carried by the tool carrier makes a greater angle with the stropping means than with the grinding means.
Claim 2
Dependent Claim
95 words
A grinder for sharpening tool blades which includes a grinding means and a stropping means, means to drive the grinding means and stropping means, a tool carrier movable transversely relative to the grinding means and the stropping means, the stropping means being located from the tool carrier by a distance greater than the grinding means, and means mounting the tool carrier for pivotal movement about an axis parallel to its direction of transverse movement whereby a blade carried by the tool carrier makes a greater angle with the stropping means than with the grinding means.
Claim 3
Dependent Claim
93 words
A grinder for sharpening tool blades including a grinding wheel and a stropping wheel, the wheels being spaced and coaxial, means to rotate the wheels, a tool carrier for receiving and retaining a blade and movable along an axis parallel to the axes of the wheels, and means mounting the tool carrier for pivotal movement about said axis; the diameter of the grinding wheel being greater than that of the stropping wheel whereby a blade carried by the tool carrier makes a greater angle with the stropping wheel than with the grinding wheel.
Claim 4
Dependent Claim
93 words
A grinder for sharpening tool blades including a grinding wheel and a stropping wheel, the wheels being spaced and coaxial, means to rotate the wheels, a tool carrier for receiving and retaining a blade and movable along an axis parallel to the axes of the wheels, and means mounting the tool carrier for pivotal movement about said axis; the diameter of the grinding wheel being greater than that of the stropping wheel whereby a blade carried by the tool carrier makes a greater angle with the stropping wheel than with the grinding wheel.
Claim 5
Dependent Claim
52 words
The grinder as claimed in claim 2, wherein the means to rotate the wheels is a motor having a shaft, the wheels each being located on the shaft of the motor, one wheel being located on one side of the motor and the other wheel on the other side of the motor.
Claim 6
Dependent Claim
37 words
The grinder as claimed in claim 2 including a grinder casing, a bar parallel to the wheels'' axes connected to the grinder casing, the tool carrier being located on the bar, and being connected to the casing.
Claim 7
Dependent Claim
58 words
The grinder as claimed in claim 4 wherein the grinder casing is provided with at least one index mark parallel to the wheels'' axes, the index mark being so located that when a blade attached to the carrier is adjusted to contact the mark the blade is set so that a predetermined bevel angle will be ground thereon.
Claim 8
Independent Claim
117 words
A method of sharpening tool blades including the steps of locating the blade in a carrier which is constrained for movement transverse to a grinding means and a stropping means and which carrier is mounted for pivotal movement about the axis of movement, moving the carrier so the blade can be contacted with the grinding means to form or reform a bevel thereon, moving the carrier transversely so the blade can be contacted with the stropping means which is spaced further from the carrier than is the grinding means, and stropping the edge of the blade on the stropping means to remove the grinding burr from the bevel face thereby forming a sharp edge on the blade.
Claim 9
Independent Claim
117 words
A method of sharpening tool blades including the steps of locating the blade in a carrier which is constrained for movement transverse to a grinding means and a stropping means and which carrier is mounted for pivotal movement about the axis of movement, moving the carrier so the blade can be contacted with the grinding means to form or reform a bevel thereon, moving the carrier transversely so the blade can be contacted with the stropping means which is spaced further from the carrier than is the grinding means, and stropping the edge of the blade on the stropping means to remove the grinding burr from the bevel face thereby forming a sharp edge on the blade.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |