Fire escape, ladder, or scaffold

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182

SECTION I - CLASS DEFINITION

This class includes (1) structures supported in spaced relation to the earth"s surface for supporting a workman adjacent a structure being worked on, (2) means for climbing comprising a stile having steps or rungs, (3) means ancillary to normal egress means to traverse a vertical distance to facilitate quick escape from a structure in case of emergency not elsewhere provided for and (4) torso harness, for rescue or escape operations, with or without a tether anchored to the work or to a worker"s support.



 
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Subclass
Title
3
TORSO HARNESS
366 Patents
82
WALL- OR FLOOR-ATTACHED
214 Patents
127
LADDER WITH LAND VEHICLE
228 Patents
129
COMBINED
438 Patents
187
SCAFFOLD EXTERNAL OF SHAFT
369 Patents
1
MEANS MAINTAINING STEP LEVER ON HORIZONTALLY PIVOTED LADDER
29 Patents
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2.1
MEANS MAINTAINING PLATFORM LEVEL ON ANGULARLY MOVABLE SUPPORT
39 Patents
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2.2
Adjustable to plural operating positions
15 Patents
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2.3
Swingable support
21 Patents
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2.4
Of dielectric material
14 Patents
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2.5
Ladder associated
10 Patents
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2.6
Providing access to underside of elevated surface
14 Patents
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2.7
Parallelogram linkage
28 Patents
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2.8
Foldable hinged support
46 Patents
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2.9
Hydraulically operated
57 Patents
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2.11
Telescopic support
76 Patents
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4
Window washer type
11 Patents
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231
Attached to strand wound on reel, and means for retarding unwinding of strand
41 Patents
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232
Including spring for rewinding strand
8 Patents
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233
Fluid resistance brake
27 Patents
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234
Movable, friction brake element applied by centrifugal force
36 Patents
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235
Friction brake and occupant-operated mechanism for applying brake during descent
17 Patents
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5
Strand-engaging, with descent retarder
173 Patents
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6
Leg or loop type
55 Patents
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