Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1990-03-16
1991-04-23
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 92BS, 51228, 51 91BS, B24B 4912, B24B 300, B24B 1900
Patent
active
050090399
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to devices and machines for skate sharpening and especially to all-automatic devices and machines of this kind.
BACKGROUND OF THE INVENTION
Skating has become increasingly popular, i.a. thanks to the great increase of the number of artificially frozen ice-hockey rinks and skating arenas. In connection therewith also the need of sharpening of the skates has increased considerably. At the same time the requirements of the quality of the sharpening have increased, e.g. as regards ice-hockey and figure skates.
At present, almost all sharpening of skates is performed manually or semi-automatically, the skates being braced in a jig or the like and a rotating grinding wheel being passed over the skate blade a desired number of times. Not only the manual, but also the semi-automatic sharpening method requires a certain sharpening skill of the operator, and the sharpening procedure is time-consuming.
There is thus a great need of fully automated skate sharpening machines, which do not require any skilled operator but can be used by anybody, and which provide for a rapid sharpening of high quality. As far as we know there is no all-automatic skate sharpening machine on the Swedish market, but there are several proposals for such machines in the patent literature, e.g. in U.S. Pat. Nos. 2,438,543, 3,735,533, 3,827,185 and 4,235,050. These previously disclosed automatic skate sharpening machines have deficiences in various respects, and the present invention relates to improvements, simplifications and developments of the known skate sharpening devices.
OBJECT OF THE INVENTION
It is an object of the invention to provide an improved, simplified and safer device for the loading of skates into all-automatic skate sharpening machines.
Another object of the invention is to provide for simplified sensing of the skate length, with consequent simplification of the mechanisms for gripping the skate and guiding the same when passing the grinding wheel during the sharpening process.
A further object of the invention is to provide an all-automatic skate sharpening machine, which has a simple, rugged and reliable design, is very simple to use and meets high demands as regards the quality of the sharpening.
These and other objects of the invention, which will become evident--directly or indirectly--from the following description of preferred embodiments, are achieved in that the skate sharpening devices have been given the characteristics indicated in the appended claims.
SHORT DESCRIPTION OF THE DRAWINGS
The enclosed drawings shown the following:
FIG. 1 is a schematic oblique front perspective view of a preferred embodiment of an automated skate sharpening machine according to the invention.
FIG. 2 is a first side elevational view of the skate sharpening machine shown in FIG. 1, the side wall having been removed.
FIG. 3 is a side elevational view corresponding to FIG. 2 and showing the opposite side of the skate sharpening machine.
FIG. 4 is a rear view of the skate sharpening machine according to FIGS. 1-3, the rear wall having been removed.
FIGS. 5 and 6 are perspective views of a skate loading device according to the invention forming part of the skate sharpening machine shown in FIGS. 1-4, viewed from the inside of the machine and shown in the loading position and in the starting position for sharpening respectively.
DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 substantially shows the front of a preferred embodiment of a skate sharpening machine according to the invention, i.e. the side facing the user. The skate sharpening machine is generally designated by the reference numeral 1 and its front wall is designated 1a. Although only the front wall 1a is shown in the drawings, it is to be understood that also the other sides of the skate sharpening machine (the top and bottom sides included) in use are covered with robust cover plates preventing the user from getting access to the inside of the skate sharpening machine. On the front wall 1a there is shown a skate loading
REFERENCES:
patent: 2438543 (1948-03-01), Custin et al.
patent: 3735533 (1973-05-01), Salberg
patent: 3827185 (1974-08-01), Smith
patent: 4235050 (1980-11-01), Hannaford et al.
patent: 4534134 (1985-08-01), Consay et al.
Driver Joseph W.
Lager Kjell
stlund Olov
Tarnstrom Anders
Schmidt Frederick R.
Svenska Skatebox AB
Watson Bruce P.
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