US PATENT SUBCLASS 212 / 346
.~ Trolley having wheels which contact different sides or planes of a beam
Current as of:
June, 1999
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212 /
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TRAVERSING HOISTS
71
DF
OVERHEAD
{7}
346
.~ Trolley having wheels which contact different sides or planes of a beam
DEFINITION
Classification: 212/346
Trolley having wheels which contact different sides or planes of abeam:
(under subclass 71) Subject matter wherein the trolley
includes plural wheels arranged in non-parallel axes for contacting off-set surfaces on the beam.
SEE OR SEARCH THIS CLASS, SUBCLASS:
198, for apparatus having a counterweight mounted on a wheeled carriage for rectilinear movement relative to the support above the load.
225+, for a boom* mounted for movement about a vertical axis and having a trolley thereon.
257, for a boom mounted for movement about a horizontal axis only and having a trolley thereon.
312+, for a traveling bridge* having a trolley* thereon.
SEE OR SEARCH CLASS
104, Railways,
89+, for suspended trolley railways and subclasses 188+ monorail railways (no hoisting feature claimed).
105, Railway Rolling Stock,
163, for overhead crane trucks (trolleys) where no hoisting structure is claimed.
