Pneumatic suspension system
First Claim
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1. An active pneumatic suspension system for resilient and damping connection of relatively-vibratable structures, comprising:
- a housing for pneumatically suspending relatively-vibratable structures resiliently, the housing having a working chamber for containing a pressurized gas and means varying the volume of the working chamber in response to the relative vibration of the structures for the pneumatic suspension;
inlet valve means operable for admitting pressurized gas into the working chamber;
outlet valve means openable for venting gas from the working chamber; and
control means responsive above respective thresholds to respective vibration of the structures toward and away from each other for opening only one of the outlet and inlet valve means, respectively, thereby to damp the vibration of the structures with the varied amount of the gas in the working chamber, the control means comprising;
a damping chamber for having pressurized gas therein and having a throttle opening connecting it to the working chamber; and
at least one piston suspended operatively between the gas pressures in the working and damping chambers for movement in response to a gas pressure differential between the working and damping chambers above the respective thresholds opening one of the inlet and outlet valve means.
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Abstract
A pneumatic suspension system between relatively-vibratable structures has a single expansible pneumatic working chamber for pneumatically isolating the vibrations between the structures and inlet and outlet valves responsive to a control for opening only one at a time in response to vibrations which exceed respective vibration thresholds. The valves then admit or vent gas from the working chamber to damp vibrations in the threshold-determined range which includes resonance.
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Citations
16 Claims
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1. An active pneumatic suspension system for resilient and damping connection of relatively-vibratable structures, comprising:
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a housing for pneumatically suspending relatively-vibratable structures resiliently, the housing having a working chamber for containing a pressurized gas and means varying the volume of the working chamber in response to the relative vibration of the structures for the pneumatic suspension; inlet valve means operable for admitting pressurized gas into the working chamber; outlet valve means openable for venting gas from the working chamber; and control means responsive above respective thresholds to respective vibration of the structures toward and away from each other for opening only one of the outlet and inlet valve means, respectively, thereby to damp the vibration of the structures with the varied amount of the gas in the working chamber, the control means comprising; a damping chamber for having pressurized gas therein and having a throttle opening connecting it to the working chamber; and at least one piston suspended operatively between the gas pressures in the working and damping chambers for movement in response to a gas pressure differential between the working and damping chambers above the respective thresholds opening one of the inlet and outlet valve means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification