US 5,774,936 A · Roller, in particular a castor

Abstract

The invention relates to a roller, especially a deflection roller (R), with a fork (2) bearing the tyred running wheel (1) and a braking device (25), at least for the rotary movement of the wheel (1), which has a push-rod (10) which can be moved towards the wheel (1) via an actuating device (1), a braking component (26) pressing into the tire (29) and a power storage spring (F) between the actuating device (11) and the braking device (11), and, in order to provide an easily used, tire saving braking device, proposes that the characteristic/prestress on the power storage spring (F) be designed in relation to the pressure resistance of the tire (29) in such a way that, in the braking position of the actuating device (11), in relation to the braking component (26), a determined depth of penetration into the tire (29) stopping the rotation of the wheel (1) is maintained and not exceeded.

Claims8

Dependent claims

A roller, in particular a castor (R), comprising a fork carrying a rotatable wheel with a tire and a braking device adapted for braking rotation of the wheel, a push-rod mounted displaceably towards the wheel and including an actuating device enabling displacement of the push-rod towards the wheel, said braking device comprises a braking member mounted on a bottom portion of the push-rod so as to press into the tire upon displacement of said push-rod towards said wheel into a braking position, and an energy storage spring operatively mounted so as to act against said braking member enabling an axial shortening of said push-rod against force of said energy storage spring, and wherein the energy storage spring is prestressed in relation to pressure resistance of the tire such that in the braking position, the braking member maintains, without exceeding, a penetration depth into the tire specified for stopping the rotation of the wheel.

A roller, in particularly a castor, comprising

a fork carrying a rotatable wheel having a tire, and
a braking device adapted for braking rotation of the rotatable wheel,
a push-rod mounted displaceably towards the wheel, and including an actuating device for enabling displacing said push-rod towards said wheel,
said braking device has a braking member mounted on said push-rod and adapted to press into the tire upon displacement of said push-rod towards said wheel, and
an energy storage spring operatively interposed with prestressing between said actuating device and said push-rod enabling an axial shortening of the push-rod against force of said energy storage spring, the prestressing of the energy storage spring in relation to pressure resistance of the tire being such that in a wheel braking position of the actuating device, the braking member maintains, without exceeding, a penetration depth into the tire specified for stopping rotation of the wheel.

2 more elements

Dependencies are inferred from the claim text.

Roller, in particular a castor

Life of this patent

Roller, in particular a castor

Life of this patent

Abstract

Claims8