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AssigneeMagnavox Government and Industrial Electronics Company
InventorsWilliam E. Richeson, Frederick 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 damping with a one-way return of air compressed beyond source pressure back to the air source as it nears its destination position. Air supplied to power the piston may be differentially controlled to compensate for asymmetric resistance to movement and the air damping may be differentially controlled to provide dissimilar damping at the two extremes of piston motion. 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 positions 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 stable positions;
A pneumatically powered valve actuator comprising a valve actuator housing;
A pneumatically powered valve actuator comprising a valve actuator housing:
A pneumatically powered valve actuator comprising a valve actuator housing;
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, and means for returning air which is compressed to a pressure greater than the source pressure to the source.
Dependencies are inferred from the claim text.