Trench shield having wheels simultaneously provided for protection and rolling purposes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 5, 2000
Grant Date -
N/A
app pub date -
Apr 14, 1999
filing date -
Apr 14, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trench shield includes: a pair of shielding wheels rotatably mounted on a pair of retaining plates; a plurality of brace members passing through two retaining plates for retaining the two shielding wheels, each shielding wheel formed as a protective circular panel for shielding a side wall of a trench excavation for preventing collapse of the trench walls; and two control devices each provided for locking or unlocking each shielding wheel on each retaining plate; whereby upon unlocking of the wheels from the retaining plates and upon rolling of the wheels in the trench, the trench shield will be forwardly moved conveniently and smoothly.
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