초록 ▼

An electric pump including a linear motor consisting of a stator and a moving element driven by the electromagnetic field generated by the stator, and a pump piston driven by the linear motor, is disclosed. The piston is arranged inside the stator of the electric pump and forms the moving element of

An electric pump including a linear motor consisting of a stator and a moving element driven by the electromagnetic field generated by the stator, and a pump piston driven by the linear motor, is disclosed. The piston is arranged inside the stator of the electric pump and forms the moving element of the linear motor. An oil well facility provided with such an electric pump is also disclosed.

대표청구항 ▼

[ We claim:] [1.] Electric pump which comprises a linear motor, formed by a stator and a moving component which can be moved under the effect of the electro-magnetic field generated by the stator, a pump piston which can be moved inside the stator by the linear motor of the electric pump and constit

[ We claim:] [1.] Electric pump which comprises a linear motor, formed by a stator and a moving component which can be moved under the effect of the electro-magnetic field generated by the stator, a pump piston which can be moved inside the stator by the linear motor of the electric pump and constituting the moving component of the linear motor, the piston including a non-return valve, the electric pump comprising, in addition, a non-return valve fixed in relation to the piston herein the non-return valve is placed on the end of the piston so as to reduce to a minimum the dead volume between the two non-return valves.