| 摘要 |
Methods are disclosed for improving the performance and design of snorkels (20) that are arranged to reduce splashes of water from entering the snorkel (20) during use. Methods including providing a non-floating active portion (72) and a spring member (54) to move active portion (72) to a closed position (68). Methods are provided for using weighted members (94) and, or floats (44) in conjunction with biasing members (54) exerted with torque across pivoting arms (42) and along longitudinal directions of motion (100). Methods are provided for enabling dry top snorkel devices (38) to automatically achieve, maintain or reestablish a closed position (68) at depth even if little or no pressure differential exists between the inside and outside of the snorkel (20) or if the sealed connection is disengaged at depth, such as can occur during a firm exhale at depth. Other methods are providing for moving the sealing member (46) to a closed position (68) even if no float (44) is used or if no spring member (54) is used. |
