Electrically-driven rotary vane pump

Pumps – Motor driven – Pump within rotary working member

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Details

417316, 417410, 417420, 417439, 417503, 418 15, 418 84, 418 87, 418 97, F04B 1700

Patent

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044076410

ABSTRACT:
The pump comprises a pump stator (5), an electric motor stator (4), and a rotor (6) that constitutes the rotor both of the pump and of the electric motor. The pump stator comprises a tubular non-magnetic lining to the electric motor stator, and the rotor is mounted excentrically inside said tubular lining and is equipped with radially movable vanes (63) that co-operate with said lining to provide pumping action when the rotor rotates. The arrangement is particularly applicable to oil-sealed vacuum pumps, and has the advantage of being more compact than units of similar performance, but equipped with a pump and a motor that are separate and interconnected by a mechanical coupling, as is conventional practice.

REFERENCES:
patent: 1849222 (1932-03-01), Canton
patent: 2072307 (1937-03-01), Kenney
patent: 2187033 (1940-08-01), Hubacker
patent: 2324434 (1943-07-01), Shore
patent: 2535019 (1950-12-01), Steenson
patent: 2612311 (1952-09-01), Warrick et al.
patent: 2703370 (1955-03-01), Steenson
patent: 3310229 (1967-03-01), Maehara
patent: 3707339 (1972-12-01), Budgen

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