WO1984004504A1

WO1984004504A1 - Mechanism for tractioning of the bycicle's pedals in the "dead point region" from its actuation cycle

Info

Publication number: WO1984004504A1
Application number: PCT/BR1984/000002
Authority: WO
Inventors: Manoel Neto Rached
Original assignee: Manoel Neto Rached
Priority date: 1983-05-11
Filing date: 1984-04-27
Publication date: 1984-11-22
Also published as: BR6300606U; JPS60501254A; EP0148192A1

Abstract

Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, according to the design that accompanies and integrates this report, consists of a mounted bracket (1) or solded on the rear higher fork of the bycicles, perpendicularly to the two metal rods (2 and 3) that constitutes the fork and right above the reer wheel, having this bracket length a little higher to the distance in horizontal line from crank's arm (8) to the other (9), the extremities of the bracket being in the alignment with the crank's arms (8 and 9) and they are adequated to the connection or coupling of two cables endowed of elasticity (4 and 7) in each side of the bycicle. These two cables have their other extremity connected to the pedals (5 and 10), through small braces (6) or other kind of connection, that are fixed on the part that cover the pedals, in the inside extremity of each pedal, next to the cranks' arms (8 and 9). With this invention built according to this summary and the design attached with it, we can increase the bycicle's efficiency through the rationalization of its actuation cycle, better utilizing the forces that the man can apply on the pedals and giving more continuaty to the bycicles functioning.

Description

TECHNICAL ^"FIELD

Mechanism for tractioning of the bycicle's pedals in the "dead point region" from its actuation cycle.

This invention relates to a mechanism for tractioning of the bycicles 's pedals in the "dead point region" from its actuation cycle, intended to increase the bycicles' efficiency through the rationalization of its actuation cycle, better utilizing the forces that can be applied by the man to the peda and giving more continuity to the functioning of the bycicles. BACKGROUND ART

Presently the bycicles have an actuation cycle in that in about 40% of the circle described by the pedals, the man can't forces to move the bycicles; because of this, it's very difficu to climb hills with the bycicles. Now, with the present inventi we can incrase the bycicles' efficiency in hills and in plan surfaces, accumulating potential energy in the region of actuation cycle where the man can apply more forces with less efforts. This energy will be converted in cynetics energy in th region that ins't profited by the actual bycicles. BRIEF DESCRIPTION OF THE DRAWING

The global representation of the present invention is in the design that accompanies and integrates this report, in whic Indication 1 is a bracket;

Indications 2 and 3 are the two metal rods that constitut the rear higher fork of the bycicle;

Indications 4 and 7 are two cables endowed of elasticity; Indications 5 and 10 are the bycicle's pedals; Indication 6 is a small brace; Indications 8 and 9 are the cranks' arms. BEST MODE OF CARRYING OUT THE INVENTION

The bracket (1) is mouted or solded on the rear higher fo of the bycicles, perpendicularly to the two metal rods (2 and 3) that constitute the fork, right above the rear wheel, having th bracket length quite higher to the distance in horizontal line from one crank's arm (8) to the other (9) , being its extremitie adequated to the conection or coupling of two cables endowed of elasticity (4 and 7) .

These cables may be completely of elastic, or a long spri or constituted by or elastic(s) and

above extremity of a hard shaft, and in this case the bracket

(1) is guide of the hard shafts and is too support to the compression of the springs .

Each cable endowed of elatitity ( 4 and 7) has its other extremity conected to the pedal (5 and 10 ) through a small brac

(6) os another kind of connection, that is fixed to the part that covers the pedal' s axle in the inside extremity of each pedal, next to the crank ' s arm.

The lenght of these two cables (4 and 7) may be adequated to permit the tractioning and return of one cable , before the other cable begins to be tracioned.

Claims

1. Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, characterized by a mounted bracket or solded on the rear higher fork of the bycicles perpendicularly to the two metal rods that constitutes the fork right above the rear wheel, having this bracket length a little higher to the distance in horizontal line from one crank's arm to the other, the extremities of the bracket being in alinment with the cranks' arms and they are adequated to the connection or coupling of two cables endowed of elasticity.

2. Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, as claimed in claim 1, characterized by two cables endowed of elasticity, being the present invention valid to some kinds of cables:- these cables may be made completely of elastic, they may be a long spring, can be constituted by a non-elastic material, associated with springs or elastics, or constituted yet of a hard shaft endowed of a spring in the above extremity and in this case, the bracket of the claim 1 is the guide of the shafts and is support to the compression of its springs; in this last case, the springs can be mounted on the bracket and not in the above extremity of a hard shaft.

3. Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, as claimed in claims 1 and 2, characterized by two cables endowed of elasticity that are connected to the two bycicles' pedals trough small braces or another kind of connection that is fixed on the part that covers the pedals' axle, in the inside extremity of each pedal, next to the cranks' arms.

4. Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, as claimed in claims 1, 2 and 3, characterized by two cables endowed of elasticity, that can be tied or attached directly to the two rods that constitute the rear higher fork of the bycicles in the most adequate higth, in order to get higher performance; these cables can have their other extremities tied or fixed directly to each pedal .

5. Mechanism for tractionig of the bycicles' pedals in the "dead point region" from its actuation cycle, as claimed in claims 1, 2, 3 and 4, characterized by the possibility of being endowed of a bush or bearing installed around the axle of each pedal, between the pedal and the crank's arm on which, in this case, will be installed the connection of claim 3.

6. Mechanism for tractioning of the bycicles' pedals in the "dead point region" from its actuation cycle, as claimed in claims 1, 2, 3, 4 and 5, characterized for its quality of accumulating potential energy in the region of actuation cycle in wich the man's legs can apply to the pedals more force with less effort, after that this accumulated potential energy is transformed in kinetics energy in the region of "dead point" of the cycle.