Gripping device for timber

Details Gripping device for timber Gripping device for timber

1994-05-17

1995-04-18

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Independent rung or step

182100, E06C 708

Patent

active

054070252

ABSTRACT:
A gripping device is provided for use with vertical or near vertical timbers on building sites, especially with 2".times.4", 2".times.6", or 2".times.8" planks, and which allows such timbers to be used with a series of the devices forming steps of a temporary ladder. The timber may be leaning against a surface, or may be part of a scaffold or studs of a house. The device may be formed of a single piece of rod, or as a casting. It has a closed loop part suitable for use as a step, and also has a retaining part, the retaining part and loop having parallel portions defining an open sided recess for receiving the timber. At least one of the parallel portions has a set of teeth facing the other parallel portion, such that the device can be slid sideways on to a timber and can be pivoted down to cause the teeth to engage the timber and prevent further movement of the device.

REFERENCES:
patent: 244298 (1924-03-01), Heid
patent: 1098945 (1914-06-01), Frederick
patent: 1312399 (1919-08-01), Heywood
patent: 2086280 (1934-12-01), Matter
patent: 3121471 (1962-08-01), Soderberg
patent: 3340961 (1966-04-01), Provaznik
patent: 3726360 (1973-04-01), Price et al.
patent: 3833090 (1974-09-01), Georgianna

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