CA1229985A

CA1229985A - Skate clamp

Info

Publication number: CA1229985A
Application number: CA000458933A
Authority: CA
Inventors: Norman Paquette; Bernhard Pelzer
Original assignee: DUPLISKATE JONAH Ltd
Current assignee: DUPLISKATE JONAH Ltd
Priority date: 1984-07-16
Filing date: 1984-07-16
Publication date: 1987-12-08

Abstract

ABSTRACT OF THE DISCLOSURE
A skate mounting assembly for a skate sharpening machine of the type in which the skate is held securely and the sharpening stone is drawn over the stationary blade. The mounting assembly is to be secured to the sharpening machine and includes an elongated open framework defining a skate receiving area and skate clamping means are mounted on the assembly and consist of a pair of jaws being located opposite one another with at least one of the jaws being movable toward and away from the gap and the other jaw.

Description

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, SKATE CLAMP

. Field ox the Invention This invention relates to skate sharpening machines and in particular to an assembly for mounting a skate in a skate sharpening machine.

Background of the Invention : Many forms of skate sharpening machines are I;: available and, conventionally, these are usually represented by a hand held clamping arrangement for securing a skate :. 10 blade in a horizontal position and then the skate is moved by hand in a horizontal plane against the surface of a rotating sharpening stone. The main problem with these ; conventional skate sharpening devices is that, no matter how careful the operator may be, there it no guarantee that the plane of the skate blade and the plane in which the I: stone is rotating are in exact conformity with one another and it often happens that the sharpening is done out of alignment and, if an inexperienced operator is using the machine, too much pressure can be applied to the blade against the stone and it is almost impossible to get a pair of skates properly matched with contour, depth of cut etc.
A big improvement in sharpening devices is shown in United States Patent 4,085,547 Lawson et at of April Thea, 1978 where the sharpening device has a grinding wheel that is A do . .

I

supported over a skate blade by a parallelogram and watts linkage. The skate is held securely on the machine and the stone is brought down onto the blade in proper alignment with it. However, the means for clamping the skate in the machine of US. Patent 4,0~5,547 has been less than satisfac~
tory.

Summary of the Invent _ The present invention provides means for quickly and accurately clamping a skate blade in a machine of the type referred to above and according to a broad aspect the invention relates to a skate mounting assembly for a skate sharpening machine of the type wherein the skate is held stationary and the sharpening stone is drawn over the stationary blade. The mounting assembly comprises a base member adapted to be secured to the sharpening machine, an elongated, open frame located at one end of the base member and skate clamping means consisting of a pair of jaws being located opposite to one another and defining a skate blade receiving gap there between. it least one of the jaws is movable toward and away from the gap and the other jaw.

Brief Description of the Drawings The invention is illustrated in the accompanying drawings in which:
Figure 1 is a perspective view of the invention mounted on a sharpening machine-Figure 2 is a plan view of the assembly;
Figure 3 is a side view of the assembly; and Figure 4 is an end view thereof.

"I I 5 Referring to Figure 1, the skate sharpening machine 10 includes a base 12, linkage 14 and grinding wheel head 16 with a grinding wheel 18-mounted therein. The skate mounting assembly 20 according to the invention is securely located on top of the base member 12 as illustrated and a skate shown in phantom line it raised from the illustrated position into the confines of the assembly 12 where it is clamped in position.
Turning now to Figures 2, 3 and 4, the assembly 20 - 10 consists of a base member 22 which is secured to the upper surface of the sharpening machine base 12. Base member 22 is generally T-shaped in that, at one end, it is provided with an elongated open frame 24 having an inner rail 26 and an outer rail 28 interconnected by short end rails 30.
15 As shown in Figure 4, the frame rails 26 and 28 have gently curved upper surfaces 31 to facilitate the normal curvature of a skate blade once the blade is mounted in the frame. Preferably, the frame 24 is integrally formed or cast with the base 22 although it will be appreciated that the frame could be separately formed and suitably connected to the base member by welding, cap screws or the like.
The means for clamping a skate in the assembly consists of a pair of jaws of substantial length and thickness, one jaw 32 being associated with the inner frame rail 26 and another jaw 34 being associated with the outer frame rail 28. The assembly will function satisfactorily if the inner jaw 32 is secured to the inner frame rail 26 or to the base member 22, leaving all movement up to the outer jaw 34. Preferably however both jaws are movable to provide as much latitude as possible in dealing with skate blades of varying thickness. To this end, the inner jaw 32 is secured to a slider or slid able body 36 which is mounted in a channel 38 in the lower surface of the base 22. The slider 36 is provided with elongated slots 40 to provide some limited movement of the slider 36 Al I

3~5 relative to a pair of dowel pins 42 secured to the vase 22 and passing through the slots 40. Precise location of the inner jaw 32 is provided by a movable eccentric 44 operating on a gemmed surface 46. A suitable gauge I is included to locate the inner jaw 32 relative to types of skates to be sharpened.
The outer jaw 34 is biased to an open position by spring means 50 bearing against a surface 52 of the-clamp and located in a block support 54 as clearly shown in Figure 3.
Jaw 34 is provided with a cam Andy operating handle 56, cam 54 acting on an eccentric surface 58 as shown in figure 4.
With the jaw 34 in an open position, a skate 60, Figure 3, is inverted so that its blade 62 is positioned 15 between jaws 32 and 34. As jaw 32 is either stationary or has been placed in proper location by its actuating cam, the operator only has to rotate the actuating handle 56 and the jaw 34 moves-towards the gap and inner jaw 32 to securely hold the skate blade throughout a substantial amount of its length. The skate sharpening machine can then be actuated and the skate sharpened in accordance with its I- method of operation.
Those skilled in the art will appreciate that the various features, characteristics and advantages of the present invention have been set forth herein or are readily realizable from the detailed description of the preferred embodiment. However, the disclosure is illustrative and various changes may be made while utilizing the principles of the present invention and falling within the scope of invention as expressed in the appended claims.

A

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A skate mounting assembly for a skate sharpening machine of the type wherein the skate blade is held stationary and a rotating sharpening stone is drawn over the stationary blade, said sharpening stone having a rotary axis at right angles to the longitudinal axis of said skate blade, said mounting assembly comprising:
a base member adapted to be secured to said sharpening machine;
an elongated, open frame located at one end of said base member;
and skate clamping means comprising a pair of jaws being located opposite to one another and defining a skate blade receiving gap therebetween; at least one of said jaws being movable toward and away from said gap; and wherein one of said jaws is mounted on said base member and the other jaw is mounted on said frame.

2. An assembly according to Claim 1 wherein the sharpening stone rotates in a vertical plane about a horizontal axis.

3. An assembly according to Claim 1 or 2 wherein said open frame is integrally formed with said base member; a channel in said base member, slide means mounted in said channel for limited linear movement therein and said first jaw being secured to one end of said slide means; and a rotatable cam in a second jaw of said pair thereof for effecting movement of said second jaw towards said gap and the first jaw.

4. A skate mounting assembly for a skate sharpening machine of the type wherein a skate blade it held stationary and a rotating sharpening stone is drawn over said stationary skate blade, said sharpening stone having a rotary axis at right angles to the longitudinal axis of said skate blade, said mounting assembly comprising:
a base member adapted to be secured to said sharpening machine;
an elongated, open frame located at one end of said base member;
and skate blade clamping means comprising a pair of jaws being located centrally in said open frame, opposite to one another and defining a skate blade receiving gap therebetween; at least one of said jaws being movable toward and away from said gap and wherein one of said jaws is mounted on said base member and the other jaw is mounted on said frame.

5. An assembly according to claim 4 wherein said open frame is integrally formed with said base member; a channel in said base member, slide means mounted in said channel for limited linear movement therein, a first jaw of said pair thereof being secured to one end of said slide means;
and a rotatable cam in a second jaw of said pair thereof for effecting movement of the second jaw towards said gap and the first jaw of said pair thereof.