Machine element or mechanism – Control lever and linkage systems – Foot operated
Patent
1991-08-27
1993-02-02
Braun, Leslie A.
Machine element or mechanism
Control lever and linkage systems
Foot operated
74531, 74539, 188 20, 188 7952, G05G 114
Patent
active
051829630
ABSTRACT:
A control mechanism of the soft release type includes a cylindrical drum about which is concentrically arranged a helical clutch spring the coil turns of which are normally contracted radially inwardly into frictional engagement with the outer periphery of the drum, characterized in that the drum is formed of powdered metal that is impregnated with damping oil. Owing to the direction of the coil turns, the drum may be rotated only in a first direction relative to the spring, and upon radial outward expansion of the spring, the viscous film of the damping oil between the outer periphery of the spring affords controlled soft-release of the drum for rotation in the opposite direction.
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Heimann Robert L.
Perisho Randal J.
Soucie Wayne L.
Braun Leslie A.
Orscheln Co.
Trousdell William O.
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