Atomizing pump
US4986453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | May 16, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1018
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A finger-operated pump is provided with a pump chamber and a fixed supply conduit communicating with the pump chamber. A movable sealing conduit is adapted to slidably and sealingly engage the supply conduit in a telescoping relationship. A primary piston is operably disposed in the chamber and defines a discharge passage out of the pump chamber. A poppet having a primary valve means for occluding the discharge passage is biased against the primary piston by a spring. The poppet has a secondary valve means for occluding flow through the sealing conduit that engages the poppet through a lost motion arrangement which is defined in part by the spring and which permits a limited degree of relative movement between the poppet and the sealing conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.