Air pump
US8727753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2011 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jul 28, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B39/121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
There is provided an air pump in which vibration noise generated in a drive unit of the pump is suppressed from being transmitted to the outside through a suction passage. A casing of the air pump has a suction port extending from an outer peripheral surface to inner peripheral surface of the casing, a noise reduction wall annularly formed on the outer peripheral surface of the casing such that the suction port opens in a region of the outer peripheral surface of the casing surrounded by the noise reduction wall, and a lid member closing the opening of the top of the noise reduction wall and cooperating with the noise reduction wall and the outer peripheral surface of the casing to define a noise reduction chamber communicating with the suction port. The noise reduction wall has an elongated noise reduction passage extending circumferentially in the noise reduction wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.