Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1991-06-04
1993-01-12
Halvosa, George E. A.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
180312, 248636, 248562, 267219, F16F 900
Patent
active
051783746
ABSTRACT:
A hydraulic damping device has a pair of supporting members to be secured to a vibrating body and a frame, respectively, and a rubber block disposed between the supporting members. A concave surface of the rubber block and a rubber sheet which is joined to the rubber block together define a liquid chamber filled with a damping liquid. A partition defines the liquid chamber into a main liquid chamber and an auxiliary liquid chamber. The partition has an opening which is closed with an elastic rubber wall. The partition is also provided with a throttle passageway which communicates with both the main liquid chamber and the auxiliary liquid chamber. The elastic rubber wall has a flat surface facing the main liquid chamber, and a concavely curved surface facing the auxiliary liquid chamber so as to have an arch-shaped cross-section. An inner periphery of the partition, which an outer periphery of the elastic rubber wall contacts, has an inclined surface so that the diameter of the opening of the partition decreases from the side of the main liquid chamber toward the auxiliary liquid chamber.
REFERENCES:
patent: 4682753 (1987-07-01), Clark
patent: 4711206 (1987-12-01), Andra et al.
patent: 4781362 (1988-11-01), Reuter et al.
patent: 4787610 (1988-11-01), Kojima et al.
patent: 4852864 (1989-08-01), Bitschkus et al.
patent: 5009404 (1991-04-01), Hirazawa
Halvosa George E. A.
Toyoda Gosei Co,., Ltd.
Toyota Jidosha & Kabushiki Kaisha
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