Hand pump apparatus having two pumping strokes and having an attachment member for engaging with different tire valves
US5683234A · kind A · utility
31Cited by
12References
1Claims
0Family size
Inventors
Key dates
| Filing date | Nov 18, 1996 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Nov 18, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3584
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hand pump includes a piston slidably engaged in a housing for separating the housing into two chambers. A tube is secured on top of the housing. The piston includes two annular grooves for receiving two sealing rings. A piston rod has one end secured to the piston and has the other end extended outward of the housing. The piston may pump the air in upper chamber into the tube when the piston moves upward, and the air in the lower chamber may be pumped into the tube when the piston moves downward. The tube includes two mouths for engaging with different tire valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.