Patent US3881280A successfully refreshed from Google Patents.
US3881280A
Expired / Lapsed
US
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Ice skate sharpening device with a floating skate guiding member
Assignee: Individual
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Filing: 1974-10-29
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Granted: 1975-05-06
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Expires: 1994-10-29
Abstract
Abstract A bench-mounted skate sharpening device embodying a base plate on which there is mounted an electric motor having a drive shaft which carries a rotary abrasive grinding wheel. A casing on the base plate encloses the grinding wheel and has an opening in its top wall which exposes a limited portion of the grinding wheel and renders the latter accessible for application thereto of a skate blade. A cradle member which is capable of limited oscillation within the opening adjustably receives thereon a skate blade guide assembly which defines a guide slot through which the skate blade to be sharpened is manually pushed longitudinally in order to draw the edge of the blade progressively and transversely across the periphery of the grinding wheel, the assembly being so designed that the lateral frictional thrust of the grinding wheel against the blade tends to bring the latter into coincidence with the general plane of the wheel. Micrometer-type adjustment is provided for shifting the skate blade guide assembly laterally on the cradle member in order to compensate for skate blades of varying thicknesses. The base plate, when loosely positioned on a bench or other subjacent supporting surface, is capable of limited rocking movement thereon and is spring-biased in a direction so that it will yield to the downward pressure exerted by the skate blade on the grinding wheel.
Inventors
- 👤 Arnold M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:19
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
A skate blade sharpening device adapted to hollow grind the effective supporting edge of a skate blade and comprising a base plate adapted for positioning on a bench top or the like, an electric motor mounted on said base plate and having a drive shaft projecting forwardly therefrom, a circular abrasive grinding wheel fixedly mounted on the forward end of said shaft, a casing emcompassing said wheel and a portion of the shaft, the upper region of said casing being provided with an opening which exposes a limited peripheral region of the wheel for transverse application thereto of the skate blade at such time as the supporting edge of the latter is drawn progressively and longitudinally through the slot, a floating cradle member at least in part encompassing said shaft and capable of limited free oscillation about the axis of the shaft, and a blade-positioning and guide assembly defining a blade-receiving slot for sliding reception therein of the skate blade and adjustably mounted on the cradle member for small increments of lateral adjustment in a generally tangential direction with respect to the grinding wheel.
Claim 2
Dependent Claim
184 words
A skate blade sharpening device adapted to hollow grind the effective supporting edge of a skate blade and comprising a base plate adapted for positioning on a bench top or the like, an electric motor mounted on said base plate and having a drive shaft projecting forwardly therefrom, a circular abrasive grinding wheel fixedly mounted on the forward end of said shaft, a casing emcompassing said wheel and a portion of the shaft, the upper region of said casing being provided with an opening which exposes a limited peripheral region of the wheel for transverse application thereto of the skate blade at such time as the supporting edge of the latter is drawn progressively and longitudinally through the slot, a floating cradle member at least in part encompassing said shaft and capable of limited free oscillation about the axis of the shaft, and a blade-positioning and guide assembly defining a blade-receiving slot for sliding reception therein of the skate blade and adjustably mounted on the cradle member for small increments of lateral adjustment in a generally tangential direction with respect to the grinding wheel.
Claim 3
Dependent Claim
57 words
A skate blade sharpening device as set forth in claim 1 and wherein one side wall of said blade-receiving slot is laterally yieldable and normally serves to displace the skate blade and compress the same against the opposite side wall of the slot, said latter side wall being fixed with respect to the blade-positioning and guide assembly.
Claim 4
Dependent Claim
41 words
A skate blade sharpening device as set forth in claim 2 and wherein said blade positioning and guide assembly is slidable bodily on said cradle member, and means are provided for releasably clamping said assembly in selected positions of lateral adjustment.
Claim 5
Dependent Claim
39 words
A skate blade sharpening device as set forth in claim 3 and wherein a micrometer adjusting screw is provided for adjusting the position of the blade-positioning and guide assembly on said cradle member when the clamping means is released.
Claim 6
Dependent Claim
46 words
A skate blade sharpening device as set forth in claim 4 and wherein bearing means are interposed between said motor shaft and floating cradle member and are effective at least in part movably to support the latter on the motor shaft during rotation of the latter.
Claim 7
Dependent Claim
71 words
A skate blade sharpening device as set forth in claim 5 and wherein a housing is provided for the electric motor and is mounted on the base plate, the housing includes a front wall having a circular opening therein, and the cradle member includes a rearward tubular extension which projects loosely into said circular opening, said tubular extension and circular opening constituting additional bearing means for movably supporting the cradle member.
Claim 8
Dependent Claim
66 words
A skate blade sharpening device as set forth in claim 6 and wherein said housing for the motor is provided with a top wall the general plane of which is horizontal and is disposed approximately in tangential relationship with respect to the grinding wheel, and an elongated longitudinally extending clearance slot is formed in said top wall for guiding the skate blade through said blade-receiving slot.
Claim 9
Dependent Claim
48 words
A skate blade sharpening device as set forth in claim 7 and wherein spring means are provided for yieldingly supporting said base plate on said bench top, said spring means being designed to assimilate the downward thrust of the skate blade on the grinding wheel during skate-sharpening operations.
Claim 10
Dependent Claim
63 words
A skate blade sharpening device as set forth in claim 8 and wherein said spring means is effective between the forward end region of the base plate and the bench top, whereby when the rear end region of the base plate is effectively positioned on the bench top, the base plate is supported on the latter for limited fore and aft rocking movement.
Claim 11
Dependent Claim
63 words
A skate blade sharpening device as set forth in claim 1 and wherein spring means are provided for yieldingly supporting said base plate on the bench top, said spring means comprising a plunger-like foot member projecting through an opening adjacent to the forward end region of the base plate, and a compression spring encompassing said foot member and yieldingly urging the latter downwardly.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |