Machine element or mechanism – Elements – Cranks and pedals
Patent
1995-10-27
1998-01-06
Marmor, Charles A.
Machine element or mechanism
Elements
Cranks and pedals
36131, G05G 114
Patent
active
057042560
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
The present application is the national stage of PCT/94/FR00376.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a device for fastening a shoe on a pedal, more particularly suitable for fastening a cycling shoe on a bicycle pedal, of the safety type, i.e., designed so that the shoe and the pedal separate automatically in the event of an accident. The strength of the fastening being by design such that separation occurs.
The invention involves a device for fastening a shoe on a pedal which includes magnetic means fastened to the shoe and/or the pedal and magnetic metallic means attached to the pedal and/or the shoe. The magnetic metallic means, which are metallic means made from a magnetic metal and cooperate with the magnetic means, are referred to as metallic means hereinafter to simplify the description. A device of this kind has a small number of component parts; the invention is light in weight and very easy to maintain; the invention enables the cyclist to walk comfortably when wearing the shoes.
2. Discussion of Background
A fastening device of this kind, as described in JP-A-3 243 488, for example, must naturally also include spacing means causing one of the members to be moved away from the other, mechanically and against the action of magnetic forces. Fastening and unfastening of the shoe and of the pedal in normal use and automatic unfastening in the event of an accident require control of these operations simultaneously in terms of force and displacement. The device described in the document cited above does not provide such control, and the aim of the invention is to alleviate this major drawback.
SUMMARY OF THE INVENTION
In accordance with the invention, a device for fastening a shoe to a pedal comprises, firstly, magnetic means attached to the shoe and/or the pedal and metallic means attached to the shoe and/or the pedal. Secondly, spacing means are capable of moving the shoe and the pedal away from each other in the direction increasing the magnetic airgap. The spacing means are circumferential ramp means carried by said shoe and/or said pedal and such that relative rotation of said shoe and said pedal causes said movement of the shoe and the pedal away from each other.
With this arrangement, unfastening is better controlled, whether it is automatic in the event of an accident or intentional. The ramp means extend circumferentially along the surface of a cylinder of revolution the axis of which defines the rotation axis about which the shoe and the pedal rotate relative to each other when they are unfastened, said axis intersecting the area of the shoe to which the user applies pressure when pedalling. Engagement and releasing of the pedal by the shoe are then fast and easy, which is advantageous in the application of a fastening device of this kind to bicycles, especially "all terrain" bicycles.
Longitudinal and/or transverse abutment means are provided between the shoe and the pedal.
The magnetic means are carried by the shoe.
Alternatively, the magnetic means are carried by the pedal.
A protective plate covers the magnetic means.
Ramps of complementary shape are preferably attached to the shoe and the pedal.
The pedal advantageously includes a magnetic metal plate; the metal plate covers the bottom of a cup having a cylindrical edge; the cylindrical edge has ramps complementary to ramps carried by the shoe.
There is advantageously a circumferential clearance between the complementary ramps.
The metal plate is attached to a bushing adapted to receive a pedal spindle.
The metal plate is advantageously cup-shaped with a cylindrical rib carrying the ramp means.
The protective plate is preferably formed as a polepiece; the polepiece is bevelled.
An amagnetic ring surrounds the magnet.
The ramp means are carried by the amagnetic ring; alternatively, the ramp means are carried by the polepiece.
The sole of the shoe includes a guide member.
The magnetic means carried by the shoe or the pedal are advantageously in t
REFERENCES:
patent: 550409 (1895-11-01), Hanson
patent: 588038 (1897-08-01), Tudor
patent: 3537719 (1970-11-01), Gottfried
patent: 3927897 (1975-12-01), Olson et al.
patent: 4103563 (1978-08-01), Genzling
patent: 4735107 (1988-04-01), Winkie
patent: 4827633 (1989-05-01), Feldstein
patent: 5170574 (1992-12-01), Weisbrich
patent: 5284066 (1994-02-01), Weiss
patent: 5473963 (1995-12-01), Aeschbach
Patent Abstracts of Japan, vol. 16, No. 034 (M-1204), Jan. 28, 1992.
Marmor Charles A.
Rodriguez Saul J.
LandOfFree
Device for fastening a shoe on a pedal, and shoe and pedal with does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for fastening a shoe on a pedal, and shoe and pedal with , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for fastening a shoe on a pedal, and shoe and pedal with will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2320426