Randal P Griffith
Electrician at Niver Ave, Denver, CO
License number
Colorado 22734
Issued Date
Jul 24, 2000
Renew Date
Mar 15, 2001
Type
Electrical Apprentice
Address
Address
2
767 Niver Ave, Denver, CO 80221
Denver, CO
Denver, CO
Personal information
See more information about Randal P Griffith at radaris.comName
Address
Phone
14501 Akron St, Thornton, CO 80602
14501 Akron St, Brighton, CO 80602
767 Niver Ave, Northglenn, CO 80260
Professional information
Electromagnetic Actuator Mechanism For Centrifugal Pump
US Patent:
5816784, Oct 6, 1998
Filed:
May 9, 1996
Appl. No.:
8/644042
Inventors:
Jack R. Postuchow - Aurora CO
Randal P. Griffith - Wheat Ridge CO
Randal P. Griffith - Wheat Ridge CO
Assignee:
A. R. Wilfley & Sons, Inc. - Denver CO
International Classification:
F04B 3504
US Classification:
41742311
Abstract:
An electromagnetic actuating mechanism is provided for a centrifugal pump in which a solenoid ring includes a radially inwardly projecting annular seal movable between open and closed positions with respect to a rotary seal which is mounted for rotation with the drive shaft between the expeller and reservoir region of the pump housing. Spring members are engageable with the ring to normally retain the annular seal in the closed position when the pump is not in operation, and a magnetic drive member is selectively energized to initiate movement of the ring in a direction overcoming the biasing elements to shift the ring to an open position when pump operation is initiated. An energizing control circuit is associated with the pump motor to regulate energizing and deenergizing of the drive member.