Device for operating a parking brake
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorHiromu Konishi
Life of this patent
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Abstract
A device for operating a parking brake including a pivotable lever for stretching a brake cable and a one-way locking mechanism for the lever having a pawl and ratchet teeth. The pawl is actuated by the balance of a spring force and the reaction force of the cable stretched so that the pawl is driven into engagement with the ratchet teeth by the reaction of the cable against the spring force when the cable is stretched beyond a predetermined tensioned condition.
Claims6
A device for operating a parking brake comprising a lever arranged to be pivotable around a pivot axis, a ratchet element having ratchet teeth arranged along an arc centered at said pivot axis, a pawl pivotably supported by said lever and adapted to selectively engage said ratchet teeth so as to effect a one-way lock of the pivotal movement of the said lever, a spring resiliently biasing said pawl to be out of engagement with said ratchet teeth, a release element for biasing said pawl to be out of engagement with said ratchet teeth, a cable for actuating the parking brake, said pawl having a portion connected with one end of said cable and adapted to stretch said cable in accordance with a pivotal movement of said lever, said portion being spaced from the pivot axis of said pawl so that said pawl is pivotally moved toward engagement with said ratchet teeth by the reaction force applied by said cable so that said pawl engages at least one of said ratchet teeth when said cable is stretched beyond a predetermined tensioned condition.
A device for operating a hand brake for an automobile comprising:
- a ratchet element having teeth arranged in an arc about a pivot center;
- a lever mounted for pivotal movement adjacent said ratchet element, said lever carrying a pivot means;
- a pawl pivotally mounted from a pivot point to said pivot means, said pawl having ratchet engaging means on one side of said pivot point and parking brake cable engaging means on the other side of said pivot point so that pivotal movement of said lever will stretch the cable and cause the pawl to pivot and the ratchet engaging means to engage the ratchet teeth, thus holding the lever in its pivoted position;
- means to release said pawl from said ratchet teeth.
Dependencies are inferred from the claim text.