Brakes – Internal-resistance motion retarder – Resistance alters relative to direction of thrust member
Patent
1993-11-19
1995-02-28
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Resistance alters relative to direction of thrust member
188299, B60G 1708, F16F 946
Patent
active
053928830
ABSTRACT:
A regulable hydraulic dashpot for motor vehicles. It features a shock-absorbing piston (1) and a shock-absorbing cylinder (2). The piston travels into and out of the cylinder on a rod (21). The piston divides the cylinder into two hydraulics compartments (3 & 4). The piston accommodates constrictions that incorporate pressure-sensitive valves (26 & 27). The piston has at least one bypass port. A system of (34) of electromagnetically operated valves reroutes the bypass ports in accordance with whether the dashpot is in the suction state or the compression phase. The object is continuous regulation of the level of shock absorption in a dashpot, rapid response to frequent actuation, an easy-to-establish base line, and a simple design. A slide-valve bolt (13) is associated with the routing (5, 9, 10, & 6) of the bypass during the suction phase. Another slide-valve bolt (14) is associated with its routing (6, 8, and 7) during the compression phase. Each slide-valve bolt is subject to a spring (11 & 12) that forces it to maintain the bore closed. The bolts accommodate pilot reservoirs (15 & 16) that are provided with hydraulic fluid through a port in the bolt from whichever hydraulics compartment is pressurized. The pilot reservoirs communicate through a hydraulic-fluid line (17). The line can be opened and closed to various extents by an electromagnetically controlled bolt (18). Fluid flows out of the pilot reservoir in whichever slide-valve bolt is subjected to pressure through the port in whichever slide-valve bolt is not subjected to pressure.
REFERENCES:
patent: 4497394 (1985-02-01), Ferrand et al.
patent: 4620619 (1986-11-01), Emura et al.
patent: 4958704 (1990-09-01), Leiber et al.
patent: 5078240 (1992-01-01), Ackermann et al.
patent: 5207300 (1993-05-01), Engel et al.
Huang Zhen
Schmidt Klaus
August Bilstein GmbH & Co. KG
Fogiel Max
Oberleitner Robert J.
Poon Peter M.
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