Modular vacuum pump assembly
US4123201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1973 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Sep 4, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C27/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.