Suction conduit device of endoscope that prevents clogging
US8568303B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2010 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Aug 9, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a suction valve in which a suction conduit is connected from a treatment instrument insertion channel through a branch portion so as to open/close this suction conduit, there is no passage between a side face of a valve-portion passage in the valve and a side face of a piston shaft, but only the valve-portion passage and an inner-shaft passage of the piston shaft are used, and their diameters d3 are made larger than a diameter d2 of the suction conduit. Also, the diameter d2 of the suction conduit is made larger than an inner diameter d1 of the treatment instrument insertion channel. As a result, a suction load when a solid substance, a substance with high viscosity or the like is suctioned is reduced, and clogging by the suctioned substances in a passage in the suction valve is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.