Woodward Governor Company

Henri A Siedow

Jon S Pointer

George Sanchez

Richard J Way

Donald R Samuelson

Kent R Hanson

Allan W Larson

Brett R Berlin

Jeffrey E McBride

Arthur C Pintauro

Gary A Warwick

Gregory J Broadsack

A electrical solenoid suitable for fluid controls applications with an elastomeric retaining device of an elastomeric material arranged between the housing and the lamination stack. The elastomeric retaining device eliminates the need for potting compound and the associated steps of filling the housing with potting and curing the potting compound. The solenoid has a wire coil wound about the lamination stack in which the wire coil has an electrical connection extending through the housing for electrical communication with an external electrical control. The end of the lamination stack projects out of the housing slightly after manufacturing and assembly. When the solenoid is mounted, the elastomeric retaining device biases the lamination stack against the mounting surface. The wire coil is pre-assembled in a wire coil assembly comprising a bobbin, a wire coil wound about the bobbin and a plastic overmold encapsulating the wire coil and bonded to the bobbin.

Solenoid having an elastomeric retaining device and method of manufacturing same without potting

A rotary electrical actuator for mounting to a support surface in industrial applications having integral electronics that are isolated by vibration isolators from vibrations. The rotary actuator comprises a stator housing supporting a lamination stack and coils. The actuator housing has a mounting structure for mounting to the support surface (such as the mounting surface of an engine or a turbine for example) for support thereby. A rotor is carried for rotation in the stator housing. The actuator further comprises an electronics housing containing the electronics that control output of the electrical actuator. Vibration isolators supported by the stator housing in turn support the electronics housing, whereby vibrations received at mounting structure and traveling through the stator housing are dampened prior to traveling to the electronics housing. A number of embodiments are disclosed utilizing a tie rod assembly concept for the vibration isolators.

Vibration isolator and actuator incorporating same for isolating integral electronics

A shock absorber for a shaft. The shock absorber comprises a collar having an opening receiving the shaft. A clearance gap is defined between the collar opening and the shaft. A pin offset from the axis connects the collar to a shoulder on the shaft. A resilient o-ring arranged in the clearance gap engages the collar and the shaft. In operation, the collar and the shaft rotate in unison. However, when the collar accelerates or comes to a sudden stop, the resilient o-ring compresses to provide the shock absorption. The shock absorber may be incorporated into a rotary actuator. In a rotary actuator, the collar includes a stop tab that rotates between two stop surfaces of the actuator housing. When the stop tab strikes one of the stop surfaces, the resilient member compresses thereby absorbing and reducing impact force. Compression in the resilient member is snubbed via mechanical stops.

Energy absorbing shock mechanism for reducing impact and rotary actuator incorporating same

A continuously variable electrical actuator rotationally coupled to and thermally isolated from a butterfly valve. The butterfly valve may be used to modulate high temperature exhaust gas flow through an engine turbocharger. An electrical actuator provides a continuously variable output to an output shaft. The butterfly valve has its rotary position controlled by an input shaft. The input shaft and output shaft are rotationally coupled through minimum contact points to reduce heat transfer. The connection between input and output shafts also minimizes vibration transfer therebetween. An coupling tube coaxially interposed between the input and output shafts provides a thermal block to further reduce heat transfer. The input and outputs shafts are rotationally coupled to the intermediate shaft by torsion spring mechanisms to allow a limited range of axial translation for the input shaft. The torsion spring mechanisms are preloaded to prevent rotational hysteresis in the butterfly valve.

Continuously variable electrically actuated flow control valve for high

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Fort Collins, CO, United States of America

Henri A Siedow