Valve mechanism for an air pump
US4137016A · kind A · utility
2Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Aug 4, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7891
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved valve mechanism for a small sized air pump, having valve elements each of which is secured in a housing of a valve casing. The valve element has a semi-circular portion and a tongue. The semi-circular portion is trapezoidal and snuggly and firmly positioned within the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.