Edge sharpener for skis

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

51109BS, 511345R, 51352, 51354, 76 83, 76 88, A63C 1106

Patent

active

051368161

DESCRIPTION:

BRIEF SUMMARY
This invention relates to apparatus for sharpening edges, particularly to such apparatus adapted for sharpening the edges of skis. It can, however, be used for sharpening other edges if desired.
The base of a modern ski has two metal edges on its lower surface. In order for the skier to be able to turn satisfactorily, especially on ice surfaces, it is necessary that these edges are sharp. This is conventionally done by skilled personnel carrying out ski sharpening services in association with the sale of skis and ancillary ski-ing equipment.
The ski-owner can sharpen his own skis if he has a suitable tool for doing so. A known tool consists of a short metal file set in an L-section holder provided with a handle. The user moves the holder along the ski edge with the file at the side of the ski. This known implement is not very easy to use to give good results.
Other types of hand-held or hand operated ski sharpening tools are known but these also do not produce satisfactory results.
Electrically operated ski sharpeners are known in which a grinding wheel is driven by an electric motor, the grinding wheel being mounted on the output shaft of the motor. In French Patent Specification 2516004, the ski sharpener disclosed is operated by moving the rotating grinding wheel along the edge of the ski, means being provided to guide the wheel as it is moved along the edge. In this sharpener, it is not possible to adjust the amount of material removed as the device is moved along the edge. If a large amount of material is to be removed, the device has to be used several times to achieve that result.
European Patent Specification 0058983 discloses another ski sharpening device. In this device, the motor is pivotally mounted about an axis transverse to the motor axis which allows the motor limited angular movement about that axis. A compression spring is used to bias the motor within a housing to a position where the motor axis forms a small angle to the motor axis position when the device is operating. This small angle is typically 2.degree. to 3.degree.. The biasing force of the spring is overcome by the reaction between the edge of the ski and the grinding wheel so that the motor can only be operated when the motor axis is correctly aligned. The sharpening device is held against the edge of the ski and guide means are provided to assist movement of the device along the edge. The amount of material removed from the edge can be varied by altering the biasing force exerted by the spring on the motor.
In the electrically operated ski sharpening devices described above, the circumferential surface of the grinding wheel is used to sharpen the edges, and because the whole grinding surface of the wheel tends not to be used and hence is worn away unevenly, the grinding surface has to be dressed frequently in order to optimise the grinding performance of the wheel to produce satisfactory results.
According to the present invention there is provided apparatus for sharpening an elongate edge, especially the blade at the edge of a ski, comprising an abrasive disc set in a housing, a motor unit for rotating the disc about its axis, a guide surface parallel to the plane of the disc, guide means defining a guide plane substantially at right angles to the guide surface, and means to bias the disc axially to a position just proud of the guide surface.
Advantageously, the motor unit includes an axially adjustable spindle on which the disc is mounted. The position of the spindle may be adjusted within the motor unit by means of a set screw and lock nut arrangement. The means for biasing the disc may comprise a compression spring mounted in the housing which acts on the disc to move it away from the guide surface.
Alternatively, the motor armature carried by the spindle can be axially movable and urged by magnetic forces between the armature and motor housing to cause the abrasive disc to be moved away from the guide surface.
Preferably, the guide means comprises a pair of rollers, one positioned on each side of the motor unit, the surfa

REFERENCES:
patent: 3512308 (1967-01-01), Scheu, Jr.
patent: 4180946 (1980-01-01), Heijkenskjold et al.
patent: 4333273 (1982-06-01), Roucau et al.
patent: 4603509 (1986-08-01), Kunieda et al.
patent: 4630409 (1986-12-01), Hofstetter
patent: 5027280 (1991-06-01), Ando et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Edge sharpener for skis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Edge sharpener for skis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Edge sharpener for skis will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-339274

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.