| 摘要 |
The non-return valve (1), especially for a nasal spray, has a closure body (6) with a guide section (20) moving between open and closed settings in a longitudinal guide (8). Ring seat surfaces (12,14) at the ends of the longitudinal guide work with sealing surfaces (22,24) at the closure body in the open and closed positions. A passage (30) within the body guide section has an opening (32) at one end within the first sealing surface (22) and an opening (34) opening outwards between the two sealing surfaces. In the open position, there is a flow between the first opening (32) along the second seat surface (14) and, in the closed position a flow is blocked along the second seat surface. |
