Valveless metering pump with crisscrossed passage ways in the piston
US5741126A · kind A · utility
16Cited by
13References
19Claims
0Family size
Inventors
Key dates
| Filing date | Mar 1, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Mar 1, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B7/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valveless positive displacement pump with a closed end cylinder has fluid inlet and outlet ports adjacent to the closed end. A piston is reciprocally and rotatively driven in the cylinder. The piston is provided with crisscrossed helical slots formed thereon which communicate specifically with the inlet and outlet ports for pumping fluid through the positive displacement pump. The piston is rotated by a drive shaft connected to a motor and reciprocated by an cam actuator mechanism cooperating with the drive shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.