Fire escape – ladder – or scaffold – Stackable – Male and female connecting means
Patent
1992-05-08
1994-02-15
Chotkowski, Karen J.
Fire escape, ladder, or scaffold
Stackable
Male and female connecting means
403196, 403373, 403378, E04G 700
Patent
active
052858693
ABSTRACT:
A scaffolding frame to which a story can be added, comprising vertical stands which are formed as hollow sections, horizontal struts which are secured to the vertical stands, and at least one joining sleeve which is inserted into a vertical stand and can be set at a specific height by means of a safety bolt which is inserted through an opening provided in the side wall of the joining sleeve and an opening in the vertical stand which is in alignment with the opening in the joining sleeve, the scaffolding frame being characterized in that the joining sleeve has radially extending peripheral expansions on its side wall, that the vertical stand is provided at each of its ends with a section end serving as a stop for such peripheral expansions, each section end covering the cross sectional opening of the section of the vertical stand in a circular ring-shaped form and the inner circular diameter of the section end corresponding to the outer diameter of the joining sleeve without peripheral expansions, and that the safety bolt is provided with a U-shaped spring (5, 51) surrounding the vertical stand, the spring holding the safety bolt in its position in the vertical stand in which it engages the openings of the vertical stand and the joining sleeve.
REFERENCES:
patent: 2473388 (1949-06-01), Rambo
patent: 4015395 (1977-04-01), Gostling
patent: 4586844 (1986-05-01), Hammonds et al.
patent: 4830144 (1989-05-01), Werner
patent: 4949525 (1990-08-01), Weaver
patent: 5022777 (1991-06-01), Kolvites
patent: 5069309 (1991-12-01), Swiderski et al.
Chotkowski Karen J.
Osterreichischi doka Schalungstechnik GmbH
Ralabate James J.
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