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A moveable load-carrying assembly including a chassis (1) having a plurality of wheels (6) arranged as a first wheel set and a second wheel set, each wheel (6) being rotatable and swivellable relative to the chassis (1); the wheels (6) of the first wheel set being connected by a first linkage (21),

A moveable load-carrying assembly including a chassis (1) having a plurality of wheels (6) arranged as a first wheel set and a second wheel set, each wheel (6) being rotatable and swivellable relative to the chassis (1); the wheels (6) of the first wheel set being connected by a first linkage (21), and the wheels (6) of the second wheel set being connected by a second linkage (22); and wherein one of the wheels (6) of the second wheel set is linked to the opposite one of the wheels (6) of the first wheel set by a link (11) such that when one of the wheels (6) of the first wheel set is swivelled in one direction relative to the chassis (1), all the wheels (6) of the first wheel set swivel in that direction in unison, and all the wheels (6) of the second wheel set swivel in the opposite direction in unison. Means are included to provide three distinct modes of operation for a wheel set, the modes corresponding to straight-line travel, fully-steerable travel and a braking mode. The assembly also includes an apparatus for returning the steerable wheels to a straight-line position, comprising a first member (203) associated with a tie rod (202) operably connected to one or more steerable wheels, at least one further member (205, 206) pivotably associated with a fixed chassis member (201) and a resilient means (209) associated with the further member.

대표청구항 ▼

A moveable load-carrying assembly including a chassis (1) having a plurality of wheels (6) arranged as a first wheel set and a second wheel set, each wheel (6) being rotatable and swivellable relative to the chassis (1); the wheels (6) of the first wheel set being connected by a first linkage (21),

A moveable load-carrying assembly including a chassis (1) having a plurality of wheels (6) arranged as a first wheel set and a second wheel set, each wheel (6) being rotatable and swivellable relative to the chassis (1); the wheels (6) of the first wheel set being connected by a first linkage (21), and the wheels (6) of the second wheel set being connected by a second linkage (22); and wherein one of the wheels (6) of the second wheel set is linked to the opposite one of the wheels (6) of the first wheel set by a link (11) such that when one of the wheels (6) of the first wheel set is swivelled in one direction relative to the chassis (1), all the wheels (6) of the first wheel set swivel in that direction in unison, and all the wheels (6) of the second wheel set swivel in the opposite direction in unison. Means are included to provide three distinct modes of operation for a wheel set, the modes corresponding to straight-line travel, fully-steerable travel and a braking mode. The assembly also includes an apparatus for returning the steerable wheels to a straight-line position, comprising a first member (203) associated with a tie rod (202) operably connected to one or more steerable wheels, at least one further member (205, 206) pivotably associated with a fixed chassis member (201) and a resilient means (209) associated with the further member. sverse member extending between the first and second upright members.27. The apparatus of claim 22 wherein the restriction includes a first upright member, a second upright member, and a handrail extending between the first and second upright members, further wherein the restriction includes an extension projecting away from both the first and second upright members along the longitudinal axis.28. The apparatus of claim 22 wherein the restriction is segmented and includes a first segment and a second segment, with each of the first and second segments being independently movable relative to the walkway between a deployed position in which the segment at least restricts movement by the people between the first and second aisles and a stowed position in which the segment allows movement by the people between the first and second aisles.29. The apparatus of claim 22 wherein the restriction includes a reel and a flexible, coilable, elongated barrier extendibly coiled on the reel.30. The apparatus of claim 22 wherein the restriction includes a plurality of spaced apart, upright members positioned along the longitudinal axis.31. The apparatus of claim 22 wherein the restriction includes a plurality of spaced apart, upright members positioned along the longitudinal axis, with each upright member having at least a first shaft and a second shaft telescopically received in the first shaft, and wherein each upright member is received in a recess in a floor portion of the walkway when the upright member is in the stowed position.32. The apparatus of claim 22 wherein the walkway includes a floor portion and wherein the restriction includes a plurality of spaced apart, upright members, with each upright member at least partially stowed in the floor portion when the restriction is in the retracted position.33. The apparatus of claim 22 wherein the width of the walkway is about 50 inches or more.34. The apparatus of claim 22 wherein the walkway includes a floor portion and a ceiling portion positioned over the floor portion, and wherein the restriction depends from the ceiling portion.35. The apparatus of claim 22 wherein the first portion of the walkway includes an opening positioned to allow people to move between the walkway and the aircraft door, and wherein at least a portion of the restriction extends outwardly through the opening.36. The apparatus of claim 22 wherein the restriction includes a generally planar sheet.37. An apparatus for loading and/or unloading people from an aircraft