Device for ventilation of submersible pumps driven by electric motors
DE731645C
Circulation pump with electric motor drive
DE723725C
Usually multi-cylinder, single-acting piston pump
DE743622C
Shut-off valve in which the actuating spindle is sealed by a bellows membrane
DE716359C
Composite flexible skin for the elastic closure of rooms, especially acid pumps
DE687116C
Device to relieve the flexural skin used for sealing on glandless pumps or drive machines
DE678936C
Device for relieving the flexural skin used for sealing on pumps without a stuffing box
DE647172C
Device to relieve the flexural skin used for sealing on glandless pumps or drive machines
DE640766C
Centrifugal pump
DE628113C
Liquid pump
DE590003C
Machine with a rotating piston
DE581540C
Process for the production or machining of rolling pistons provided with several, approximately radial projections, performing circular (paracyclic) movements
DE566296C
Machine with a rotating piston
DE556148C
Machine set to be submerged in the pipe well, consisting of pump, motor and transformer
DE520808C
A liquid electric motor with a vertical shaft, the stator and rotor space of which are separated by a suspended cylinder made of thin, electrically poorly conductive metal
DE505087C
Stuffing box for motor and pump shaft for deep well pumps
DE481968C
Pump to be submerged below the liquid level
DE498398C
Pressure regulator to maintain the gas overpressure in motors working under liquid with a fluctuating level, or the like.
