Fire escape – ladder – or scaffold – Wall- or floor-attached – Independent rung or step
Patent
1986-12-15
1987-10-27
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Independent rung or step
182228, 182 46, 411 72, 411510, E06C 904, E06C 708
Patent
active
047023490
ABSTRACT:
A u-shaped climbing rung to be anchored in a bore hole in a wall, the climbing rung having two parallel legs each leg having two ends, one end of each leg being connected to a transverse central element or tread spaced a predetermined distance below the parallel legs and having the other end for anchoring in a wall, the legs and tread being completely encapsulated in a synthetic protective coat having an outer configuration adapted to present each end of the legs remote the tread for anchoring the climbing rung in the wall. Behind said anchoring means each encapsulated end receives a soft elastic and tightly fitting and slidable sealing collar. At least one surface of either the encapsulated end behind the anchoring means or the inside surface of the sealing collar presents alternating raised rings and annular grooves to frictionally engage and seal the interface between the encapsulated end and the inside surface of the sealing collar. Each sealing collar frictionally slides along each leg to present a sealing face to an abutting wall deforming when abutting the surface of the wall to accommodate the surface configuration of the wall surrounding the bore hole whereby the combination of the anchor for securely anchoring the end of each leg in a wall, the alternating raised rings and annular grooves and the sealing collar thereby precludes water and corrosive material from penetrating the bore hole.
REFERENCES:
patent: 3098663 (1963-07-01), Dibley
patent: 3374532 (1968-03-01), Zenhausern
patent: 4385777 (1983-05-01), Logsdon
patent: 4570943 (1986-02-01), Houseman
patent: 4610330 (1986-09-01), Borst
Hughes Ivor M.
Machado Reinaldo P.
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