Foam pumps with lost motion and adjustable output foam pumps
US8955718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Apr 13, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Embodiments of lost motion foam pumps are disclosed herein. One exemplary embodiment includes a liquid chamber, a liquid piston movable in the liquid chamber, an air chamber and an air piston movable in the air chamber. The air piston is linked to the liquid piston. A connector is linked to the air piston or the liquid piston. The connector includes an engagement member for connecting to an actuator of a foam dispenser. Movement of the actuator in a first direction moves the liquid and air pistons to contract the liquid chamber and the air chamber. Movement of the actuator a first distance in a second direction does not move the liquid piston or the air piston; however, continued movement of the actuator a second distance in the second direction moves the liquid piston and the air piston and expands the liquid and air chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.