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US 2010/0247281 A1Published application
Double Offset Caster System
AssigneeProduction Resource Group, LLC
InventorJames Kempf
Life of this patent
Estimating the term…
Abstract
A double offset caster system uses two sets of rotatable offsets relative to one another so that the caster can move relative to the load. The offset changes in order to change the relative offset between the caster position and the load.
Claims21
A double offset caster system, comprising:
- a wheel assembly, which rotates to roll, said wheel assembly having a first connection;
- a load connection plate, having a connection to a load, and also having a second connection;
- and
- an offset plate, which has third and fourth connections which are offset from one another, said third connection on said offset plate being connected to said second connection of said load connection plate and a direction between the connection between said second and third connections defining a first axis and said fourth connection of said offset plate connected to said first connection of said wheel assembly, and a direction between the connection between said first and fourth connections defining a second axis, where said first and second axes are substantially parallel to one another but offset laterally relative to one another;
- a first rotation device, which allows first rotation between said first connection on said wheel assembly and said fourth connection on said offset plate;
- and
- a second rotation device which allows a second rotation between said second connection on said load connection plate and said third connection on said offset plate.
4 more elements
A double offset caster system, comprising:
- a wheel assembly, with at least one wheel and a connection part;
- a load connection plate, with a connection to a load that will be moved by said caster system;
- an offset plate, which has first and second connections which are offset from one another,
- said first connection of said offset plate having first surfaces extending in a first direction defining a first axis of said load connection plate,
- said second connection of said offset plate having second surfaces extending in a second direction defining a second axis of said wheel assembly,
- where said first axis is substantially parallel to and offset from said second axis;
- a first rotation device, which allows first rotation on said first axis between said wheel assembly and said offset plate;
- and
- a second rotation device which allows a second rotation on said second axis between said load connection plate and said offset plate.
6 more elements
A method of moving a load on a set of casters, comprising:
- moving a load on a caster relative to a floor;
- changing a direction of moving said load;
- in response to changing said direction, causing a change in the direction between a first part which is connected to the load, and a second part which is connected to the floor, by using an offset plate between said first and second parts, where said offset plate changes direction when the load changes direction.
Dependencies are inferred from the claim text.