Abstract: A hydraulic regenerative braking system for a vehicle is provided. The system includes two hydraulic machines, each of which is disposed proximate a corresponding vehicle wheel. A transformer is in communication with each of the hydraulic machines, and with a pair of accumulators. Each of the hydraulic machines is operable as a pump, pumping fluid to at least one of the accumulators when the vehicle is braking. Each of the hydraulic machines is also operable as a motor, receiving pressurized fluid and transferring torque to the vehicle wheels. The transformer is operable to vary the pressure of the fluid received by the hydraulic machines.

Abstract: A compact, double-throw double-pole push-button electric switch is comprised of: a base; four electric terminals fixed to the base; a lower spring retainer pivoted on the base; a push-button key slidingly disposed and captively retain within a housing connected to the base; an upper retainer pivotally disposed within the push-button key and carrying a shorting bar between the opposing pairs of terminals; a coil compression spring captively retained at one end by the lower spring retainer and captively retained at its opposing end by the upper spring retainer; and a pair of double lobe cams connected to the lower spring. As the push-button is depressed, the camming surface within the push-button key comes into sliding contact with one of the two lobes of each of the cams. The cams rotate on the base and bring a fixed lever arm extending from the cam into contact with the shorting bar.