Check valve in an ink pump for an ink-jet printer
US6267473A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17596
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A check valve for an ink pump for an ink jet printer. The check valve is exposed to a pressure, P1, on one side and a pressure, P2, on the other side. The check valve opens when P1 is greater than P2. The check valve shuts when P1 is less than P2. The check valve has a circular valve seat; a resiliently deformable, circular valve disk; and a centrally disposed cylindrical pin. The pin axially symmetrically locates the valve disk with respect to valve seat. The pin also has an annular seat disposed so that a fluid tight longitudinal seal is formed between the valve disk and the annular seat. The annular seat also supports the valve disk against the pressure, P2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.