Fire escape – ladder – or scaffold – Pitched roof conforming scaffold
Patent
1994-12-28
1996-09-10
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Pitched roof conforming scaffold
182 3, A62B 3500
Patent
active
055536859
ABSTRACT:
The present invention relates to a personal fall-arrest safety anchor of a unitary form, including a hoop portion for encircling a standard dimensioned rafter and an apertured tab portion for attachment of a lifeline. The hoop portion includes two parallel vertical members and a bridging web unitarily connecting the lower ends of the vertical members. The bridging web prevents pullout of the anchor in the direction of forces exerted by a lifeline. The bridging web further allows a bracing or wedging member to be inserted between the bottom of the rafter and the bridging web, which act both as a locking wedge and additional load bearing support for the rafter. An independent overlapping plate installed over the vertical members of the anchor reduces the chances of fastener pull-out by a torque or shearing force upon fasteners. A preformed elastomeric flashing with a frusto-pyramidal apertured member is installed over the tab portion for weather-proofing the anchor.
REFERENCES:
patent: 3217833 (1964-06-01), Smith
patent: 3269679 (1966-08-01), Grappo
patent: 3425509 (1969-02-01), Gilbert
patent: 4249713 (1981-02-01), Glynn et al.
patent: 5143171 (1992-09-01), Glynn et al.
patent: 5248021 (1993-09-01), Nichols
patent: 5370202 (1994-12-01), Nichols
Chin-Shue Alvin C.
Litman Richard C.
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