Flow sensitive, acceleration sensitive shock absorber

F - Mech Eng,Light,Heat,Weapons – 16 – F

Patent

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Details

F16F 9/504 (2006.01) F16F 9/32 (2006.01) F16F 9/46 (2006.01) F16F 9/512 (2006.01) F16F 9/516 (2006.01)

Patent

CA 2214581

An acceleration sensitive shock absorber has a tubular housing and a piston assembly in the housing (11) dividing the housing into an upper chamber (13) and a lower chamber (12). The piston is connected to the wheel of a vehicle and the housing is connected to the chassis of the vehicle. Fluid can pass between the upper and lower chamber to the upper chamber upon downward acceleration of the wheel. A movable inertia valve (46) in the piston assembly opens the first port when acceleration of the wheel of the vehicle is greater than a predetermined magnitude for increasing flow between the chambers. In addition, there is a first restricted flow path (48) downstream from the first port for creating hydraulic pressure which biases the inertia valve in an open position in response to fluid flow between the chambers. There is a second port (43) or passage for providing fluid flow from the upper chamber to the lower chamber. A second restricted flow path upstream from the second which provides hydraulic pressure to decrease the response time during compression.

Amortisseur sensible à l'accélération comportant un corps tubulaire et un ensemble piston logé dans le corps (11), divisant ledit corps en une chambre supérieure (13) et une chambre inférieure (12). Le piston est relié à la roue d'un véhicule et le corps est relié au châssis de ce même véhicule. Un fluide peut passer entre les chambres supérieure et inférieure vers la chambre supérieure en cas d'accélération de la roue vers le bas. Un correcteur-réducteur mobile (46) dans l'ensemble piston ouvre un premier orifice lorsque l'accélération de la roue du véhicule dépasse une grandeur prédéterminée afin d'augmenter l'écoulement entre les chambres. De plus, une première voie d'écoulement régulé (48) en aval du premier orifice crée une pression hydraulique qui décale le correcteur-réducteur en position ouverte en réaction à l'écoulement de fluide entre les chambres. Il existe un second orifice (43) ou passage permettant l'écoulement de fluide de la chambre supérieure à la chambre inférieure. Un seconde voie d'écoulement régulé en amont du second orifice fournit une pression hydraulique afin de diminuer le temps de réponse au cours de la compression.

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