FIELD: civil engineering. SUBSTANCE: ladder comprises stringers and steps. Novelty lies in that stringers are flexible and are wound at one end on reversible drum coaxially with flexible hose. Drum is accommodated in flexible chamber communicating with service fluid supply. The other end of hose is turned inside out and secured over edge perimeter to sealed chamber, side by side with ends of stringers. EFFECT: improved design. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LIFT | 1991 |
|
RU2048396C1 |
| COMPACTING MECHANISM | 1991 |
|
RU2034435C1 |
| AIR HOIST | 1991 |
|
RU2012537C1 |
| AIR LIFT | 1991 |
|
RU2048415C1 |
| DEVICE FOR PROTECTING FRUIT TREES AGAINST BELOW-ZERO TEMPERATURES | 1991 |
|
RU2034443C1 |
| AIR HOIST | 1991 |
|
RU2012539C1 |
| MIXER | 1991 |
|
RU2027499C1 |
| VALVING DEVICE | 1990 |
|
RU2042072C1 |
| AIR HOIST | 1991 |
|
RU2012538C1 |
| VACUUM DISTILLATION APPARATUS | 1991 |
|
RU2045976C1 |
