Fire escape – ladder – or scaffold – Horizontal traversing - actuation – control – or response – Holding means
Reexamination Certificate
1999-04-23
2001-04-17
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Horizontal traversing - actuation, control, or response
Holding means
C182S103000
Reexamination Certificate
active
06216818
ABSTRACT:
TECHNICAL FIELD
This invention relates to a mobile ladder including a goods lift.
BACKGROUND ART
There is a growing awareness of issues relating to occupational health and safety. One area of concern which has not been adequately addressed is the retrieval or placement of goods in elevated shelving. This often involves a large amount of biomechanically incorrect lifting and the carrying of goods up and down ladders.
DISCLOSURE OF INVENTION
This invention in one aspect resides in a mobile ladder including:
a goods lift moveable between an upper position at which goods on the goods lift can be accessed by a person on the ladder and a lower position at which goods on the goods lift can be accessed by a person on the ground; and
driving means for driving the goods lift between the upper and lower positions.
The goods lift may be mounted in any manner however it is preferred that the goods lift is mounted for vertical movement on a fixed guide frame.
Preferably, the driving means includes a hand-driven winch or electric motor, however any other driving means may be used. A brake winch is highly preferred due to its simplicity of use. In one embodiment, electrical or other control of the driving means is provided at both the top of the ladder and bottom of the ladder. Thus, the driving means can be operated by the operator whilst standing at the base of the ladder or whilst on the ladder.
In a highly preferred embodiment, the mobile ladder is a “default immobile” ladder including means for rendering the ladder mobile, i.e. in the absence of a mobilising force, the ladder is immobile. A default mobile ladder is disclosed in the present applicant's International Application PCT/AU96/00672 and the disclosure of that application is incorporated by cross-reference. Preferably, the default immobile ladder includes handle means which can be manually grasped to both mobilise the ladder and thereafter steer the ladder. When the handle is released the ladder returns to the default immobile position.
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Chin-Shue Alvin
Custom Ladder Company Pty. Ltd.
Heslin & Rothenberg, P.C.
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