Device for the ascension and descension of high altitudes
US4301892A · kind A · utility
9Cited by
11References
3Claims
0Family size
Inventor
Key dates
| Filing date | Aug 11, 1975 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Aug 11, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B1/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a preferred embodiment, a fire emergency descent device utilizing straps is securable onto a persons back, and a spool-mounted line (wire) is controllably releasable through overhead wire guide supports adjustable to alter the hanging position of the strapped-in person, and rate of descent being controllable either manually by a manually-adjustable variable valve and a second valve normally preset to correspond to a persons weight to controllably regulate release of compressed air from a piston cylinder housing in which air becomes compressed by piston action resulting from spinning of the spool (spindle) during descent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.