US4241544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skate blade sharpener
Assignee: Individual
•
Filing: 1978-10-30
•
Granted: 1980-12-30
•
Expires: 1998-10-30
Abstract
Abstract There is provided an apparatus for sharpening ice skates, which includes means for supporting the blade in a fixed location, and means for moving a rotating grinding member along the blade, with the grinding member rotating about an axis parallel with the plane of the blade. The guide means are provided to allow the grinding member to follow a predetermined profile. The guide means include a gearing arrangement which rotates a cam shaft as the carriage supporting the grinding member moves longitudinally of the blade. A pivotal arm supporting the grinding member has a cam follower which is raised or lowered by the cam surface, to cause the grinding member to follow the predetermined profile.
Inventors
- 👤 Joseph Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
252 words
A skate sharpening apparatus, comprising: first means for firmly supporting a skate blade, a grinding member having the shape of a surface of revolution, power means for rotating the grinding member about its axis of symmetry, second means supporting the power means for pivoting movement about a pivotal axis transverse to said axis of symmetry, the pivotal axis being spaced from the grinding member, guide means for allowing relative translational movement between the first means and the second means, and cam means controlling the pivotal position of the power means as a function of the translational position of the first means relative to the second means, the cam means being such as to cause the grinding member to follow a locus corresponding to a pre-determined skate blade profile, said cam means including a gear rack fixed with respect to said first means, a pinion meshing with and rolling on said rack, the pinion axis being transverse to the direction of translational movement and being fixed with respect to said second means; and means including a reduction gear mechanism for applying the rotation of said pinion to a cam shaft whose axis is fixed with respect to the second means whereby the cam shaft rotates more slowly than the pinion, a cam on said cam shaft, a follower mounted on the power means and bearing against the cam, the cam being contoured such that the follower causes the grinding member to follow the profile of a skate blade supported in said first means.
Claim 2
Dependent Claim
252 words
A skate sharpening apparatus, comprising: first means for firmly supporting a skate blade, a grinding member having the shape of a surface of revolution, power means for rotating the grinding member about its axis of symmetry, second means supporting the power means for pivoting movement about a pivotal axis transverse to said axis of symmetry, the pivotal axis being spaced from the grinding member, guide means for allowing relative translational movement between the first means and the second means, and cam means controlling the pivotal position of the power means as a function of the translational position of the first means relative to the second means, the cam means being such as to cause the grinding member to follow a locus corresponding to a pre-determined skate blade profile, said cam means including a gear rack fixed with respect to said first means, a pinion meshing with and rolling on said rack, the pinion axis being transverse to the direction of translational movement and being fixed with respect to said second means; and means including a reduction gear mechanism for applying the rotation of said pinion to a cam shaft whose axis is fixed with respect to the second means whereby the cam shaft rotates more slowly than the pinion, a cam on said cam shaft, a follower mounted on the power means and bearing against the cam, the cam being contoured such that the follower causes the grinding member to follow the profile of a skate blade supported in said first means.
Claim 3
Dependent Claim
42 words
The apparatus claimed in claim 1, in which said second means includes manual fine-adjustment means for adjusting the lateral position of the grinding member with respect to the second means, in order to center the same with respect to the skate blade.
Claim 4
Dependent Claim
78 words
The apparatus claimed in claim 1, in which the power means is slidable laterally with respect to the second means, in which a screw-threaded member urges the power means in one direction laterally when turned in a given rotational sense, and in which biasing means urges the power means against said screw-threaded member, whereby the lateral position of said power means can be adjusted with respect to said second means, and thus with respect to said skate blade.
Claim 5
Dependent Claim
33 words
The apparatus claimed in claim 1, in which said follower is adjustable with respect to the power means, whereby the trajectory followed by the grinding member for a given cam can be altered.
Claim 6
Dependent Claim
35 words
The apparatus claimed in claim 1, claim 2 or claim 4, in which said guide means includes cylindrical slide bars fixed to the first means, upon which the second means is mounted for sliding movement.
Claim 7
Dependent Claim
22 words
The apparatus claimed in claim 1, claim 2 or claim 4, in which the cam is replaceably snap-mounted on said cam shaft.
Claim 8
Dependent Claim
56 words
The apparatus claimed in claim 1, claim 2 or claim 4, in which there is also provided a removable toe stop against which a skate blade can abut in order to set the longitudinal position of the skate blade with respect to the first means, thereby to match the skate profile to the grinding member trajectory.
References Cited (Backward Citations)
US3164932A
Cited
US3597880A
Cited
US3719006A
Cited
US3735533A
Cited
US3889424A
Cited
US3881280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |