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1. WO1990014493 - LADDER WITH FOUR-POINT FOOTING

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

P a t e n t C l a i m s

1.
A ladder, comprising ladder rungs (5), side members or stringers (8) and support legs (6) fastened at one end to respective side members (8) for pivoting outwards therefrom, c h a r a c t e r i z e d i n that each support leg (6) independently is rapidly deployable by means of a pressure device (1) acting between the side member (8) and the support leg (6).

2.
A ladder in accordance with claim 1 ,
c h a r a c t e r i z e d I n that the pressure device (1) is articulately disposed between the side member (8) and the support leg (6) at a distance from the rotational axis (4) of said support leg.

3.
A ladder in accordance with claims 1 - 2,
c h a r a c t e r i z e d i n that the pressure device (l) is a gas damper.

4.
A ladder in accordance with claim 1,
c h a r a c t e r i z e d i n that the pressure device (1) is a spring, preferably a helical spring.

5.
A ladder in accordance with claims 1 - 4,
c h a r a c t e r i z e d i n that the means (3) of attaching each support leg (6) to the side member (8) is axially slidable in relation to said side member.

6.
A ladder in accordance with claim 5, c h a r a c t e r i z e d I n that the attachment means (3) comprises a rapidly operable clamping means (11).

7.
A ladder in accordance with claims 1 - 6,
c h a r a c t e r i z e d i n that the attachment means (3) and the holder fitting (9) for the pressure device (1) are rigidly connected to one another.

8.
A ladder in accordance with claims 1 - 7,
c h a r a c t e r i z e d i n' that each side member (8) comprises means that retain, but rapidly release, the support leg for use.

9.
A ladder in accordance with claims 1 - 8,
c h a r a c t e r i z e d i n that said means have a snapping or spring catch action.

10.
A ladder in accordance with claims 1 - 9,
c h a r a c t e r i z e d i n that it is manufactured from aluminum.