Flow control in an ink pen
US7862138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2007 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Jan 10, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17556
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In one embodiment a pressure regulator for an ink pen includes: a diaphragm between a lower pressure region and a higher pressure region, the diaphragm movable toward the lower pressure region in response to an increase in a pressure difference across the diaphragm; a valve operative between an open position in which ink may flow into the lower pressure region and a closed position in which ink may not flow into the lower pressure region; a first lever rotatable on a first fulcrum in response to movement of the diaphragm toward the lower pressure region; and a second lever connected to the valve, the second lever rotatable on a second fulcrum in response to rotation of the first lever to move the valve from the closed position to an open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.