Suction device for sucking obstruction in respiratory tract and use method therefor
US11633530B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2021 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Aug 3, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/1025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A suction device includes a negative pressure generator, a connector and a mask; the negative pressure generator comprises a housing and a piston rod, wherein the housing is internally provided with a cavity, an upper end of the housing is provided with an avoidance hole communicated with the cavity, and a lower end thereof is provided with an opening communicated with the cavity; the piston rod comprises a push-pull rod and a piston sleeved on the push-pull rod, an upper end of the push-pull rod runs through the avoidance hole, and the piston is movably and hermetically connected to an inner side wall of the housing by means of a sealing ring; an upper side of the mask is provided with a through first connecting cylinder, and a lower side thereof is provided with a flexible annular pad configured to fit with the face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.