Patent US3988124A successfully refreshed from Google Patents.
US3988124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skate sharpening machine
Assignee: Individual
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Filing: 1975-06-26
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Granted: 1976-10-26
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Expires: 1995-06-26
Abstract
Abstract An improved contouring tool, advantageously used as a skate sharpening machine, comprising means to vary the contour of the skating blade with respect to its longitudinal arc and also with respect to the centering of the arc. The sharpener of the invention also advantageously incorporates a novel low-friction surface over which a skateholder may be manipulated and a novel skate positioning and bent-blade detection means.
Inventors
- 👤 Roger M. Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:51
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/003
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
206 words
In a mchining apparatus for forming a contoured surface by carrying an article to be contoured across the face of an abrasive grinding wheel in a predetermined path, the improvement wherein said apparatus comprises a. clamp means for mounting said article in a predetermined attitude relative to said grinding tool; b. carrier means for said clamp, said carrier means pivotally attached to said clamp and adapted to move said clamp through a predetermined accurate path relative to said grinding tool; c. said carrier means comprising two elongate parallel arms each adapted for pivotal attachment to said clamp and each arm (1) pivotally attached to said apparatus at an end thereof remote from said clamp, and (2) pivotally and slideably supported at an end thereof proximate said clamp, said elongate arms so attached to said apparatus and said clamp to be parallel during pivotal movement thereof; d. and arm-length-adjusting means proximate the end of said arms remote from said clamp forming means to change the length of both arms and, consequently, the effective length of said parallel arms, and the effective path of said clamp means, as said arms move in parallel in response to the clamp means being moved across the face of said grinding wheel.
Claim 2
Dependent Claim
206 words
In a mchining apparatus for forming a contoured surface by carrying an article to be contoured across the face of an abrasive grinding wheel in a predetermined path, the improvement wherein said apparatus comprises a. clamp means for mounting said article in a predetermined attitude relative to said grinding tool; b. carrier means for said clamp, said carrier means pivotally attached to said clamp and adapted to move said clamp through a predetermined accurate path relative to said grinding tool; c. said carrier means comprising two elongate parallel arms each adapted for pivotal attachment to said clamp and each arm (1) pivotally attached to said apparatus at an end thereof remote from said clamp, and (2) pivotally and slideably supported at an end thereof proximate said clamp, said elongate arms so attached to said apparatus and said clamp to be parallel during pivotal movement thereof; d. and arm-length-adjusting means proximate the end of said arms remote from said clamp forming means to change the length of both arms and, consequently, the effective length of said parallel arms, and the effective path of said clamp means, as said arms move in parallel in response to the clamp means being moved across the face of said grinding wheel.
Claim 3
Dependent Claim
40 words
Apparatus as defined in claim 1 wherein placement of the pivotal attachment of said arms remote from said clamp is achieved by slideable friction-disk means and, consequently, forms means to achieve an infinite number of positions for said pivotal attachment.
Claim 4
Dependent Claim
42 words
Apparatus as defined in claim 1 wherein said arms comprise mechanical means to independently adjust the distance between (a) the point of attachment of said arms to said clamp and (b) the point of slideable support of said arms proximate said clamp.
Claim 5
Dependent Claim
42 words
Apparatus as defined in claim 2 wherein said arms comprise mechanical means to independently adjust the distance between (a) the point of attachment of said arms to said clamp and (b) the point of slideable support of said arms proximate said clamp.
Claim 6
Dependent Claim
66 words
Apparatus as defined in claim 1 wherein said clamp means is mounted on a table and comprises 1. a support plate forming means for slideable movement over said table; 2. a skate-holding assembly on said support plate; and 3. means to adjust the relative angular position of skate-holding assembly with respect to the path of said clamp means as it is carried past said grinding wheel.
Claim 7
Dependent Claim
53 words
Apparatus as defined in claim 5 wherein said table and said support plate form a slideable interface one surface of which is comprised of 1. a grit absorbing fabric material as bottom surface of said support plate and 2. a resilient polymeric surface on said table or a polymeric treated hardened metal surface.
Claim 8
Dependent Claim
25 words
Apparatus as defined in claim 6 wherein said polymeric surface is formed of a polyolefin polymer and said grit absorbing surface is a felt product.
Claim 9
Dependent Claim
57 words
Apparatus as defined in claim 1 and wherein the pivoted attachment between said arms and said clamp means are pins projecting from said actuator arms in a base plate of said clamp means, said attachment being such that said clamp will be pushed off said pins if force exerted toward said grinding wheel exceeds a predetermined force.
Claim 10
Dependent Claim
56 words
Apparatus as defined in claim 5 wherein the pivoted attachment between said arms and said clamp means are pins projecting from said actuator arms in a base plate of said clamp means, said attachment being such that said clamp will be pushed off said pins if force exerted toward said grinding wheel exceeds a predetermined force.
Claim 11
Dependent Claim
56 words
Apparatus as defined in claim 7 and wherein the pivoted attachment between said arms and said clamp means are pins projecting from said arms in a base plate of said clamp means, said attachment being such that said clamp will be pushed off said pins if force exerted toward said grinding wheel exceeds a predetermined force.
Claim 12
Dependent Claim
138 words
Apparatus as defined in claim 1 additionally comprising means for indicating a predetermined vertical positioning of a workpiece edge in relationship to an abrasive grinding wheel, said facilitating means being pivotally mounted adjacent said grinding wheel and comprising 1. two opposed flat springs, said flat springs spaced to form a slot adapted to receive said workpiece edge, said springs forming means to pivot said indicating means until forces exerted on said springs are equal; 2. a housing member for said flat springs onto which an end of each said spring is clamped at a position between said pivotal mounting and said slot; and 3. a bubble-type level-detecting means adapted to give a visual indication of whether or not the indicating means is pivoted from said predetermined position by a said workpiece inserted in said slot between said springs.
Claim 13
Dependent Claim
49 words
Apparatus as defined in claim 11 wherein said housing is pivotally mounted in a cover and comprises a screw-adjustment connection between said cover and housing to adjust the angular relationship one to the other, thereby facilitating setting a zero-point for said level when it is placed on a machine.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |