Vibration actuated liquid pump
US4406587A · kind A · utility
Inventor
Key dates
| Filing date | Apr 9, 1981 |
| Grant date | Sep 27, 1983 |
| Priority date | — |
| Expiry date | Apr 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/1057
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive displacement liquid pump having a free stroking piston slidably positioned within a cylindrical housing is disclosed. A pair of cooperating one-way valves, one valve communicating with a central passage defined by the piston while the other valve communicates with an inlet to the housing, coact to draw in fluid from a source of liquid. As the piston moves away from the inlet the one-way inlet valve opens filling a chamber behind the piston. The one-way valve in the piston simultaneously closes enabling the piston to drive fluid out of the reservoir chamber at an exit end of the housing, the valves acting oppositely when the piston oscillates back toward the housing inlet. The free stroking piston within the pump is set in motion by the oscillatory motion of vibration alone without direct mechanical piston actuation from a power source. The pump may cooperate with a fluid regulator to control flow of fluid from the pump housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.