TROLLEY FOR THE TRANSPORTATION OF A LOAD ON STAIRCASES
First Claim
1. A trolley for the transportation of a load on staircases having a main support frame, at least one main track mounted for rotation thereby projecting below said main support frame in order to define a first lower slide surface for the trolley, motor means or actuation means for said at least one main track, and at least one load bed supported by said main support frame, wherein said trolley comprising:
- at least one auxiliary frame structure provided with support and slide or roll means delimiting a second slide surface on the lower part, andlifting-lowering means for said at least one auxiliary frame structure designed to move said at least one auxiliary frame structure with respect to said main support frame between an upper rest position, in which said at least one auxiliary frame structure is located with its support and slide or roll means at a higher level than that of said first slide surface and said trolley is movable by said at least one main track, and a lower work position, in which said main support frame is at a level higher than said at least one auxiliary frame structure and said trolley rests on said at least one auxiliary frame structure and is movable on said slide or roll means;
said auxiliary frame structure is housable at an intermediate section of said main support frame and when placed in said upper rest position it is arranged completely within the bulk of said main support frame.
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Accused Products
Abstract
The present invention is a trolley that can safely transport a load on staircases, so as to prevent ruining or overturning the load. The trolley can easily ascend onto the first step and easily descend from the last step of a staircase. The trolley provides adjustable transport conditions during the ascent and descent on and from a staircase. The trolley can transport a load on straight staircases and on helical staircases, even with very low curvature radius. The trolley can be driven starting from both sides. The trolley can balance the load during the transportation on staircases.
9 Citations
17 Claims
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1. A trolley for the transportation of a load on staircases having a main support frame, at least one main track mounted for rotation thereby projecting below said main support frame in order to define a first lower slide surface for the trolley, motor means or actuation means for said at least one main track, and at least one load bed supported by said main support frame, wherein said trolley comprising:
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at least one auxiliary frame structure provided with support and slide or roll means delimiting a second slide surface on the lower part, and lifting-lowering means for said at least one auxiliary frame structure designed to move said at least one auxiliary frame structure with respect to said main support frame between an upper rest position, in which said at least one auxiliary frame structure is located with its support and slide or roll means at a higher level than that of said first slide surface and said trolley is movable by said at least one main track, and a lower work position, in which said main support frame is at a level higher than said at least one auxiliary frame structure and said trolley rests on said at least one auxiliary frame structure and is movable on said slide or roll means;
said auxiliary frame structure is housable at an intermediate section of said main support frame and when placed in said upper rest position it is arranged completely within the bulk of said main support frame. - View Dependent Claims (2, 3, 4, 5, 6, 10, 13, 14, 15, 16, 17)
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- 7. A trolley for the transportation of a load on staircases having a main support frame, at least one main track rotatably mounted so as to project below said main support frame in order to define a first lower slide surface for the trolley, actuation means for said at least one main track, and at least one load bed supported by said main support frame, wherein it comprises means for the angular movement of said at least one load bed with respect to said main support frame, and at least one auxiliary track placed on the front or on the back of said at least one main track and tilted or tiltable with respect to said at least one main track, said at least one main track being mounted on first pulleys or toothed wheels for rotation on first rotation axes, whereas said at least one auxiliary track is sent around second pulleys or toothed wheels mounted for rotation on second rotation axes, said first rotation axes being substantially parallel or coinciding with said second rotation axes, or at least one secondary section of said at least one main track tilted or tiltable with respect to a main section of said at least one main track, said at least one secondary section being placed at the front or back of said trolley.
Specification