Abstract: A process for storing and delivering gas. In the first step of this process, a multiplicity of at least four gas banks is filled with compressed gas to a specified pressure, the gas pressure in each of the gas banks is sequentially measured, a control system sequentially selects one of the gas banks and withdraws gas from it to the device to be filled until the rate of gas flow is less than optimum, the control system then withdraws gas from the next sequential of the gas banks while replenishing the gas in the first depleted of said gas banks.

Abstract: An auxiliary drive apparatus which comprises an engine, a first hydraulic pump driven by the engine, a second hydraulic pump driven by the engine and integrally connected to the first hydraulic pump, a third hydraulic pump driven by the engine and integrally connected to the second hydraulic pump, a first pressure limiting valve connected in parallel to the first hydraulic pump, a first vacuum breaking valve connected in parallel to the first hydraulic pump, a first hydraulic motor connected in series to the first hydraulic pump, a second pressure limiting valve connected in parallel to the second hydraulic pump, a second vacuum breaking valve connected in parallel to the second hydraulic pump, a second hydraulic motor connected in series to the second hydraulic pump, a third pressure limiting valve connected in parallel to the third hydraulic pump, a third vacuum breaking valve connected in parallel to the third hydraulic pump, and a third hydraulic motor connected in series to the third hydraulic pump.