Self-unblocking motor-driven pump having last motion shaft coupl

Details Self-unblocking motor-driven pump having last motion shaft coupl Self-unblocking motor-driven pump having last motion shaft coupl

1994-09-09

1996-10-29

Thorpe, Timothy S.

Pumps

Including disengageable rotary or frangible drive connection

417325, 4174237, 310 78, 310 92, 4151242, 464160, F04B 1703

Patent

active

055690220

ABSTRACT:
A pump driven by an electric motor includes a stator, a rotor cooperating with the stator, a rotating drive-shaft associated to the rotor, a hermetically sealed chamber, and a disk wheel within the sealed chamber and joined to the drive-shaft. The sealed chamber is sealed by a first ring gasket around the drive-shaft and in the sealed chamber and a second ring gasket fixed to the drive-shaft and against the first ring gasket. The first and second ring gaskets are pressure coupled to each other. At start-up of the motor, the rotor or the stator is allowed to turn freely for a certain initial arc without torque being applied to the coupling so that inertia can be accumulated to overcome resistance of the coupling when the torque is subsequently applied to the coupling.

REFERENCES:
patent: 1550779 (1925-08-01), Carpenter
patent: 3146756 (1964-09-01), Shimanckas
patent: 4750872 (1988-06-01), Palliser
patent: 4803855 (1989-02-01), Kennedy
patent: 4861240 (1989-08-01), Marioni et al.

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