Driveline vehicle parking brake actuator

B - Operations – Transporting – 60 – T

Patent

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Details

B60T 17/08 (2006.01) B60T 13/22 (2006.01)

Patent

CA 2509339

A driveline vehicle parking brake actuator including a reciprocable piston, a spring guide having a tubular distal portion telescopically received on the piston and a radial proximal portion which is telescopically supported within the housing by an annular wear guide, and nested cylindrical coil springs biased between the housing and the radial portion of the spring guide and a nested inner coil spring having a greater spring rate biased between the spring guide and the piston functioning in series. The distal end of the piston is attached to a cable and the springs are compressed by hydraulic or pneumatic pressure acting against the piston.

La présente invention concerne un récepteur de freinage de stationnement pour véhicule à transmission, qui comprend : un piston alternatif ; un guide de ressort comprenant une partie distale tubulaire reçue télescopiquement sur le piston et une partie proximale radiale supportée télescopiquement à l'intérieur du logement par un guide d'usure annulaire ; et des ressorts hélicoïdaux cylindriques nichés comprenant un ressort hélicoïdal cylindrique extérieur sollicité entre le logement et la partie radiale du guide de ressort, et un ressort hélicoïdal intérieur niché possédant une raideur totale plus grande, qui est sollicité entre le guide de ressort et le piston fonctionnant en série. L'extrémité distale du piston est attachée à un câble et les ressorts sont comprimés par une pression hydraulique ou pneumatique agissant contre le piston.

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