Land vehicles – Skates – Runner type
Patent
1998-03-06
2000-07-11
Johnson, Brian L.
Land vehicles
Skates
Runner type
280 1117, 280 1118, 280 1119, 280819, 273 80, A63C 507
Patent
active
060860847
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an elongate metal body, for instance an aluminium rod with a chosen cross-sectional form manufactured by extrusion.
2. Background Information
Such a body is known in many applications. A well-known application is a skate frame for an ice-skate or roller-skate. Such a frame comprises for instance an elongate carrier manufactured from aluminium by means of extrusion, to which the runner or wheels are connected.
SUMMARY OF THE INVENTION
It is a first object of the invention to make an elongate metal body stiffer and stronger without this entailing an increase in weight. In respect of this objective the metal body according to the invention has the feature that the body has at least one cavity extending at least to a considerable degree in longitudinal direction, in which cavity is received a pre-manufactured elongate reinforcing rod, of which at least the ends are coupled to the body in force-transmitting manner.
The embodiment is recommended in which the rod consists substantially of a bundle of longitudinally extending, continuous fibres embedded in a plastic matrix, in particular consisting of carbon, aramid, glass, boron, reinforced polyethylene and other synthetic and ceramic materials. Such a rod of composite material combines a very great longitudinal strength with a low weight.
A very simple and inexpensive embodiment is that in which the rod is connected to the body by glue.
For strengthening and reinforcement this variant can have the special feature that the rod is connected substantially along its whole outer surface to the body.
A further variant is characterized by biasing means for holding the rod under longitudinal bias.
For particular applications this variant can have the special feature that the biasing means are adjustable.
A specific embodiment hereof has the feature that the biasing means comprise screw means.
The biasing means can be embodied such that the rod fits into the cavity with small clearance and the biasing means are adapted to exert a pressure force on the ends of the rod.
An embodiment with optionally adjustable biasing means can have the special feature that the cavity is positioned at a distance from the neutral fibre of the body. The metal body comes under strain of bending due to the longitudinal force exerted at a distance from the neutral fibre. A bending can thus be obtained which, in the case of adjustable biasing means, can be adjusted to a desired value.
This latter embodiment in particular can, as will be described hereinbelow, be important for application in the skating sport. This is the case however for the invention in general. The invention therefore also pertains to a skate frame for an ice-skate or roller-skate which is provided with an elongate metal body having connected thereto an elongate reinforcing rod as specified above.
A runner for an ice-skate is generally ground with a determined radius of curvature. This radius of curvature is arranged in the height direction of the skate.
In the case of short-track skating and 500 metre sprint skating on the track it is at the moment usual for the skates also to have a certain curvature in sideways direction. The value thereof, which can be expressed in the radius of curvature, is greatly dependent on personal wishes and preferences. At the moment the skate frame is herein usually clamped in a vice, wherein a part of the skate is bent manually. The object of this bending operation is to obtain a better grip on the ice in the bend, whereby the skater can negotiate the bend at an even greater angle and speed without the risk of slipping.
As has been stated, the value of the radius of curvature to be adjusted is very person-dependent. The degree of bending must moreover be adapted to the ice conditions, so that there is a need for an adjustable bending.
For the purpose of grinding the runner it is further desirable that the skate is straight or can be straightened when not in use, so that the runner can be clamped into usual grindin
REFERENCES:
patent: 1459050 (1923-06-01), Drevitson
patent: 3212786 (1965-10-01), Florjancic et al.
patent: 3300226 (1967-01-01), Reed
patent: 3349537 (1967-10-01), Hopfeld
patent: 3487518 (1970-01-01), Hopfeld
patent: 3894745 (1975-07-01), Heim et al.
patent: 3972529 (1976-08-01), McNeil
patent: 4221400 (1980-09-01), Powers
Draper Deanne
Hunter Douglas Industries B.V.
Johnson Brian L.
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