×

PUMP WITH GAP-TUBE MOTOR

  • US 3,572,982 A
  • Filed: 02/24/1969
  • Issued: 03/30/1971
  • Est. Priority Date: 03/02/1968
  • Status: Expired due to Term
First Claim
Patent Images

1. A pump for chemically aggressive liquids, comprising:

  • a pump housing having a tubular portion of nonmagnetic material;

    a pump rotor coaxially journaled in said housing and having bearings enclosed within said housing so that said rotor and said bearings are exposed to liquid being pumped;

    a brushless DC motor having permanent magnet means coaxially joined with said pump rotor within said tubular housing portion and having field windings mounted externally on said tubular portion for action upon said permanent magnet means; and

    sensors responsive to angular position of said permanent magnet means for controlling the commutation of said field windings, said sensors comprising galvanomagnetic semiconductor components mounted on said pump housing externally of said tubular portion.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×