FEED PUMP, ESPECIALLY FUEL FEED PUMP FOR VEHICLE HEATER Russian patent published in 2018 - IPC F04B17/03 

FIELD: motors and pumps.

SUBSTANCE: invention is intended for use in the supply of a combustible material for a vehicle heating device. Pump 10 comprises a piston 36 that is movable to and from in pump chamber 72 for ejecting and receiving fluid. Pump drive device 30 comprises device 86 for creating a magnetic field (M) and return member 96, 98 for loading piston 36, as well as at least one drive element 28 made of a shape memory magnetic material disposed in housing 22 of drive element in which there is fluid inlet 24. Drive element 28, in the generated magnetic field (M), is designed to load piston 36 in a first loading direction. Return member 96, 98 is designed to load the piston 36, generally in the opposite direction to the first loading direction of the second loading direction and is coupled to at least one drive element 28 for returning at least one element 28 to a basic position occupied in non-generated magnetic field (M).

EFFECT: preventing noise from impacts when moving the pump piston.

12 cl, 5 dwg