Auxiliary lubricating system

Claim 2

In a system supplying lubricating oil under pressure to an operating machine having a rotor, said system including a main oil pump having a discharge oil line supplying oil under pressure of predetermined value for lubrication of said machine, a common electrical energy source, operable when energized to supply operating power separably to said machine and said main oil pump, an auxiliary oil pump, an auxiliary power supply, control means operable during pressurization of said oil line by said main oil pump to said predetermined value and upon simultaneous deenergization of said common electrical energy source to connect said auxiliary pump to said auxiliary power supply.

Claim 3

A lubricating system as set forth in claim 1 wherein said auxiliary pump is powered by a gas motor connected to a pressurized gas supply through valve mechanism operated in part by pressurization of said oil line by said main oil pump to said predetermined pressure, and in part by deenergization of said common electrical energy source.

Claim 4

A lubrication system as set forth in claim 1 wherein said auxiliary pump is powered by a gas-operated motor connected to a pressurized gas supply by first and second valves connected in series, said first valve being a normally opened solenoid-operated valve held closed by energization of said electrical source and said second valve is a normally closed pressure-operated valve held open by pressurization of said oil supply line.

Claim 5

In a system for supplying lubricating oil to a machine, said system including an oil supply reservoir, a main oil pump, an electric motor operatively connected to said pump for driving the same, an electric line for supplying energy to said motor, an oil line extending from the discharge side of said pump to said machine for lubricating the same, an auxiliary pump having discharge side thereof connected to said oil line, a gas-operated motor for operating said auxiliary pump, the intake sides of said pumps being connected to said supply reservoir, a supply of gas under pressure, a gas line connecting said supply to said gas motor, said line including a normally opened solenoid-operated valve and a normally closed pressure-operated valve, said valves being connected in series in said gas line, said pressure-operated valve being connected to said oil line and held in open position by pressure in said line, the coil of said solenoid-operated valve being connected to said oil line and held in open position by pressure in said line, the coil of said solenoid-operated valve being connected to the said electric line and upon energization thereby, said valve is maintained in closed position, whereby upon interruption of power in said electric line during pressurization of said oil line, said gas motor is supplied with gas from said gas supply.

Claim 6

In a system for supplying lubricating oil to a machine, said system including an oil supply reservoir, a main oil pump, an electric motor operatively connected to said pump for driving the same, an electric line for supplying energy to said motor, an oil line extending from the discharge side of said pump to said machine for lubricating the same, an auxiliary pump having discharge side thereof connected to said oil line, a gas-operated motor for operating said auxiliary pump, the intake sides of said pumps being connected to said supply reservoir, a supply of gas under pressure, a gas line connecting said supply to said gas motor, said line including a normally opened solenoid-operated valve and a normally closed pressure-operated valve, said valves being connected in series in said gas line, said pressure-operated valve being connected to said oil line and held in open position by pressure in said line, the coil of said solenoid-operated valve being connected to said oil line and held in open position by pressure in said line, the coil of said solenoid-operated valve being connected to the said electric line and upon energization thereby, said valve is maintained in closed position, whereby upon interruption of power in said electric line during pressurization of said oil line, said gas motor is supplied with gas from said gas supply.