Brakes – Internal-resistance motion retarder – Controlled by an operator remote from retarder
Patent
1987-02-17
1989-04-11
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Controlled by an operator remote from retarder
188319, 280714, F16F 946
Patent
active
048197718
ABSTRACT:
An adjustable damping force vibration damper for vehicles and the like is provided which includes a cylinder filled with damping fluid and a working piston axially moveable within the cylinder and dividing the cylinder into first and second spaces. Damping valves are disposed in surrounding relationship to the piston and serve to communicate damping fluid between the first and second cylinder spaces during relative movement of the working piston and cylinder during use. A damping level adjusting mechanism is provided for adjusting the flow of damping fluid between the first and second cylinder spaces, including a connecting duct disposed in bypassing relationship to the damping valves. An external actuated slideable control piston is disposed for controlling the opening of the connecting duct between the two cylinder spaces. A throttling piston is provided at one open bore of the control piston, which throttling piston is spring biased into a normal closing position against an opening of the connecting duct within the piston. The throttling piston is moveable against the spring in response to pressure forces between an open position and the closing position with limited fluid flow through a throttling bore in the throttling piston. A further throttling bore is provided in the connecting duct adjacent the end of the working piston opposite the control piston.
REFERENCES:
patent: 2836264 (1958-05-01), Groen
patent: 4645043 (1987-02-01), Imaizumi
Daimler-Benz AG
Halvosa George E. A.
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