Rotary blower with guide sleeve
US4780052A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Sep 1, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/545
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blower has a tubular air flow guiding sleeve. An electric motor is located coaxially within the sleeve in a casing connected to the sleeve by flow-straightening blades and a propeller is fixed to a rotary shaft of the motor and placed in front of the blades. A central unit comprises the tubular casing constituting a single casting with the blades and a part of said sleeve surrounding the propeller. A length of that part around the propeller is machined concentrically to an inner surface of said casing slidably receiving the stator of the motor. A PTFE ring may be located in a recess of the sleeve in radial alignment with the propeller blade tips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.