Land vehicles – Skates – Runner type
Reexamination Certificate
1996-06-28
2001-11-20
Thibodeau, Paul (Department: 1773)
Land vehicles
Skates
Runner type
C428S627000, C428S472000, C428S660000, C428S661000, C428S632000
Reexamination Certificate
active
06318738
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to ice skates. More particularly, the invention relates to ice skate blades.
2. Description of the Related Art
Ice skate blades are often subjected to severe mechanical stresses and strains. For example, hockey players are required to accelerate quickly, turn sharply, and stop suddenly. These movements subject the skate blades to extreme bending and torsional stresses.
Not only are the skate blades required to resist mechanical failure, they must also be corrosion resistant. Skate blades are continually exposed to melted ice, requiring the blade material to be rust-proof as well as strong.
A further problem in the ice skate blade's working environment is the tribological damage done to the blade edges. To the casual observer, skate blades easily glide along the surface of the ice. However, the edges of the blades are continually worn down. The problem is exacerbated when the user makes sharp turns or quick starts and stops. Hockey blades, in particular, require frequent sharpening. Sharpening these blades, however, is not a simple matter of running a file along the edge of the blade. Both figure skaters and hockey players usually take their skates to be sharpened by trained professionals who sharpen the blades according to a very particular method. Obviously, the costs of maintaining skate blades can be very high.
Generally, all of these problems get more pronounced as the user becomes more skilled. The more the skater practices, the longer the skate blade is subjected to corrosion and wear. Moreover, as the skater improves, he or she will more frequently perform complicated and difficult moves, placing ever increasing stress on the blades.
Traditional skate blades use conventional materials such as high carbon steel. Steel, however, is heavy. The heavier the blade, the more a skater has to work. Skater fatigue sets in more quickly and maneuverability is diminished.
Other candidate materials are light weight, but have other setbacks. For instance, ceramics are known to have high hardness and light weight. However, these materials have a fracture toughness much too low for practical use.
In light of the foregoing, there is a need for an ice skate blade which can operate effectively in this harsh environment with reduced weight and a high fracture toughness without requiring frequent cleaning and sharpening.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to an ice skate blade that substantially obviates one or more of the problems of the related art.
One object of the present invention is provide an ice skate blade which has improved strength, corrosion resistance, and wear resistance, while at the same time being lighter than traditional materials of manufacture.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the ice skate blade particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages, and in accordance with the purposes of the invention, as broadly described, the invention includes an ice skate blade comprised of a titanium material which is reinforced by a hard constituent.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute part of the specification, illustrate several embodiments of the invention and together with the description serve to explain the principles of the invention.
REFERENCES:
patent: 4673550 (1987-06-01), Dallaire et al.
patent: 4731115 (1988-03-01), Abkowitz et al.
patent: 4746532 (1988-05-01), Suzuki et al.
patent: 4906430 (1990-03-01), Abkowitz et al.
patent: 4968348 (1990-11-01), Abkowitz et al.
patent: 5448828 (1995-09-01), Willems et al.
patent: 4-297284 (1992-10-01), None
Abkowitz Stanley
Abkowitz Susan M.
Heussi Harold L.
Weihrauch Paul F.
Dynamet Technology
Finnegan Henderson Farabow Garrett & Dunner
Rickman Holly C.
Thibodeau Paul
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