Non-return block for snow chains
AssigneeThule, Inc.
InventorsMarco Arrigoni Neri, Luigi Farina
Life of this patent
Estimating the term…
Abstract
A non return block (5) for locking a tensioning terminal portion (7) of snow chains (2), comprising a body (51) which defines a channel (12) in which the terminal portion (7) passes and a ratchet or a pawl (13) pivoted on the body (51) to lock the terminal portion (7) is described. The non-return block comprises at least one insert (62, 63) of soft material fixed to the body (51) of the non-return block so as to protrude laterally therefrom to come into contact with the rim (8) of the wheel of the vehicle, avoiding deterioration thereof through rubbing.
Claims12
A non-return block (5) for locking a terminal tensioning portion (7) of snow chains (2), comprising a body (51) which defines a channel (12) within which the terminal portion (7) passes and a ratchet or pawl (13) pivoted to the body (51) to lock said terminal portion (7), characterised in that it comprises at least one insert (62, 63) of soft material on at least one side surface of the body (51) of the non-return block so as to protrude laterally therefrom to come into contact with the rim (8) of the wheel of the vehicle preventing deterioration thereof through rubbing.
Snow chains (2) comprising an outer element (3) that can be ring-closed, designed to be placed on the outer side of the wheel (1), an internal element that can be ring-closed, designed to be placed on the inner part of the wheel (1), said inner and outer elements being joined by variously composed elements (10) achieving the tread traction, said outer element (3) having a terminal portion (7) designed to be pulled to tension the chain (2) after passage thereof in a non-return block (5) which allows sliding thereof only in the direction of tensioning of said chains (2) and not in the opposite direction of slackening, characterised in that it comprises a non-return block (5) according to any one of the preceding claims.
Dependencies are inferred from the claim text.