Pumps – Diverse pumps – Moving partition or cylinder of rotary pump forms or...
Patent
1973-09-04
1978-10-31
Croyle, Carlton R.
Pumps
Diverse pumps
Moving partition or cylinder of rotary pump forms or...
417360, 417410, 64 27NM, F04B 2310, F04B 1700, F04B 3504, F16D 314
Patent
active
041232011
ABSTRACT:
A vacuum pump assembly has a conventional electric motor, a mounting plate centered with respect to the drive shaft of the motor, and a self-contained, replaceable modular pumping apparatus. The module has a stator, a rotor, and axially opposite end plates enclosing a pumping chamber, and is detached easily, quickly mounted onto the mounting plate as a unitary assembly, and operatively connected to the drive shaft of the motor by a shock-absorbing self-aligning coupling. It is enclosed by a pump housing containing lubricant for lubrication and sealing purposes during pump operation. The pumping module has a double seal to maintain lubricant and to allow the shaft connected to the rotor to center itself relative to the mounting plate and the motor. The module is in communication with intake and gas ballast ports through passageways in the mounting plate to provide for gas transfer therethrough, and optionally contains passageways formed in the interior face of one of the end plates which connect with vanes reciprocating in radial slots formed in the rotor to allow secondary pumping of fluids within the pumping chamber.
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Central Scientific Company, Inc.
Croyle Carlton R.
Ross Thomas I.
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