Brakes – Internal-resistance motion retarder – Controlled by an operator remote from retarder
Patent
1984-06-29
1987-01-13
Reger, Duane A.
Brakes
Internal-resistance motion retarder
Controlled by an operator remote from retarder
188319, 18832213, 200160, F16F 946
Patent
active
046357653
ABSTRACT:
The invention provides an improved adjustable hydraulic apparatus of the type having a hollow piston rod operably associated with a damping piston means which divides the interior of a cylinder member into first and second halves filled with damping fluid. At least one throttle means is operably associated with the damping piston means. The hollow piston rod includes a traverse bore disposed above the damping piston means for the constant passage of damping fluid therethrough. An axially displaceable tension rod is disposed within the interior of the hollow piston rod and is operably associated with an adjusting device. The improvement to the damper apparatus, according to this invention, provides an annular gap defined by the tension rod in combination with the inner surface of the hollow piston rod, which functions as a throttle restriction. The tension rod includes a recessed portion adjacent the annular gap which provides an opening of increased cross-sectional dimension as the tension rod moves with respect to the hollow piston. The lower portion of the tension rod is also associated with a control piston means which is axially displaceable within valve body disposed within the interior of the cylinder.
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Boge GmbH
Gilday Michael P.
Ljungman Nils H.
Reger Duane A.
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