Abstract: A pump especially suited for pumping a saturated liquid while employing motive power from a high speed rotor. The disclosed pump comprises a stationary, generally cylindrical inner wall on which is mounted a sleeve member defining a generally cylindrical outer wall radially spaced from the inner wall to define an elongated annular chamber. The outer wall is mounted for rotation relative to the inner wall and at one end of the annular chamber there is a rotarty impeller which rotates relative to the inner wall to direct fluid radially outwardly from adjacent the surface of the outer wall. Fluid supply inlet openings are provided to supply fluid through the inner wall to the annular chamber at a position axially spaced from the impeller. A vapor discharge outlet is carried by the sleeve member and provided with an inlet adjacent the inner wall at a location spaced from the fluid inlet in a direction opposite the impeller.

Abstract: A gaseous fuel system for a vehicle including an on-board compressor for recharging an associated pressure storage tank. The compressor and tank are mounted on the vehicle as a structural unit whereby the tank shields the compressor and high pressure gas flow circuits therebetween and provides a heat exchanger surface for the compressor. A regulator in series with a supply line of low pressure gas prevents gas flow when the compressor does not operate to maintain a vacuum in an intervening dispensing line. An O.sub.2 sensor disconnects the compressor motor when the percentage of O.sub.2 exceeds a predetermined safe limit. A bypass circuit allows the tank to be filled from a high pressure supply without operation of the compressor.