Patent ID: 11971041
Assignee: EDWARDS LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A drag pump for pumping fluid from an inlet to an outlet of said drag pump, comprising:
a stator and a rotor;
one of said stator or said rotor comprising a disc comprising a plurality of channels, each of said channels extending from an inlet portion of said disc at or close to an inlet edge towards an outlet portion at or close to an outlet edge, said inlet portion of said disc comprising an outer circumference of said disc, said plurality of channels each comprising walls for guiding fluid flow from said inlet edge to said outlet edge of said disc in response to relative motion between said stator and said rotor;
said disc further comprising a plurality of protrusions extending from said channels towards said other of said rotor or said stator, each of said protrusions being arranged to divide a channel of said plurality of channels at said inlet portion or said outlet portion of said channel, into sub-channels that extend for a portion of a length of said channel and do not extend for a whole length of said channel.