Title:
UNDERWATER STAIRS
Document Type and Number:
WIPO Patent Application WO/1989/002849
Kind Code:
A1
Abstract:
A plurality of boxes (1) with their bottoms opened are connected in a step form and submerged and fixed in water. A notch (2) is formed for the passage of air at the lower end of the connection side of each box (1). When air is blown into the lowermost box (1), the air is sent sequentially to the upper boxes (1) and stays inside all of the boxes (1). A diver can reach the depth of the sea by diving sequentially from the uppermost box (1) into the lower boxes (1) without using any air cylinder.
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Inventors:
NOJIMA YOUKO (JP)
Application Number:
PCT/JP1988/000926
Publication Date:
April 06, 1989
Filing Date:
September 12, 1988
Export Citation:
Assignee:
PARASIGHT YK (JP)
International Classes:
B63C11/44; E04F11/00; B63C11/34; E06C1/38; (IPC1-7): B63C11/44; E04F11/00
Foreign References:
| JPS495200U | 1974-01-17 | |||
| JPS4917000U | 1974-02-13 | |||
| DE2053034A1 | 1972-05-04 | |||
| JPS598600B2 | 1984-02-25 |
Other References:
See also references of EP 0420978A4
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