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US 4,899,700 AGranted
Pneumatically powered valve actuator
AssigneeMagnavox Government and Electronic Company
InventorsWilliam E. Richeson Jr., Federick L. Erickson
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AssigneeMagnavox Government and Electronic Company
InventorsWilliam E. Richeson Jr., Federick L. Erickson
Estimating the term…
A bistable electronically controlled pneumatically powered transducer for use, for example, as a valve mechanism actuator in an internal combustion engine is disclosed. The transducer has an armature including a piston which is coupled to an engine valve, for example. The piston is powered by a pneumatic source and includes pneumatic and hydraulic damping as it nears its destination postion. The armature is held in each of its extreme positions by pneumatic pressure under the control of control valves which are in turn held in their closed postions by permanent magnet latching arrangements and are released therefrom to supply air to the piston to be pneumatically driven to the other extreme position by an electromagnetic arrangement which temporarily neutralizes the permanent magnetic field of the latching arrangement.
A bistable electronically controlled fluid powered transducer having an armature reciprocable along an axis between first and second positions;
An electronically controllable pneumatically powered valve actuating mechanism for use in an internal combustion engine of the type having engine intake and exhaust valves with elongated valve stems, the actuator comprising:
An electronically controllable pneumatically powered bistable valve actuating mechanism for use in an internal combustion engine of the type having engine intake and exhaust valves with elongated valve stems, the actuator comprising:
A bistable electronically controlled pneumatically powered transducer having an armature reciprocable between first and second positions, motive means including an air pressure source and an air control valve for causing the armature to move, a permanent magnet latching arrangement for holding the air control valve in a closed position, and an electromagnetic arrangement for temporarily neutralizing the effect of the permanent magnet latching arrangement to open the air control valve and cause the armature to move from one of said positions to the other of said positions.
A bistable electronically controlled pneumatically powered transducer having an armature including a piston reciprocable between first and second positions, motive means comprising a source of compressed air, an air vent located about midway between the first and second positions for dumping air and removing the accelerating force from the piston and for introducing air at an intermediate pressure to be captured and compressed by the piston to slow armature motion as the armature nears one of said positions.
A pneumatically powered valve actuator comprising a valve actuator housing;
A pneumatically powered valve actuator comprising a valve actuator housing;
Dependencies are inferred from the claim text.