Longitudinally variable ladder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 1, 1980
Grant Date -
N/A
app pub date -
Jan 5, 1979
filing date -
Jan 5, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A longitudinally variable ladder with at least two ladder parts which are displaceable relative to one another in their longitudinal direction, one part of which with its two struts forms a guide for the struts of the other part, which latter struts engage between the former struts, and the rungs, which are connected with the outer struts, lie on the front side of these struts, the rungs which are connected with the inner struts lying between the two planes which are defined by the front side and the rear side of these struts. The struts of all ladder parts have the same box profile, and the inner struts are guided between at least those two rungs of the outer struts which lie in the upper end section of these struts, from which upper end section the other ladder part is able to be pulled out, and guide rails, the guide rails being limited to the end section which carries the two rungs and in this end section at least indirectly engage on the rear side of the outer struts.
First Claim
Other Claims data not available