Abstract:
An electro-hydraulic actuator (EHA) includes a hydraulic circuit having a plurality of pressure compensated flow control valves for allowing a maximum flow rate through the fluid conduits regardless of the loads imparted on the actuator. In one embodiment of the EHA, a plurality of combination manual override/thermal expansion valves that simplify the manufacture of the EHA.
Abstract:
A system for delivering digital content on demand in a multiple unit environment includes a server local to the multiple unit environment. The server stores, in its memory, the digital content, and is capable of supporting multiple simultaneous asynchronous accesses to the digital content. A billing system tracks the bill for each unit in the multiple unit environment, based on the accessed digital content. Within each unit that supports access to the digital content, an access system (preferably a set-top box) allows a user to access the digital content.
Abstract:
An electric circuit with speed control and diode separation for use with an electrically actuatable mechanism. An operator input provides a signal to a controller of the electric circuit. The controller causes a MOSFET relay to provide a voltage to the electrically actuatable mechanism. The relay is adapted to vary the voltage in response to pulse width modified signals from the controller.