Method and system for transporting inventory items
First Claim
1. A method for transporting inventory items, comprising:
- moving a mobile drive unit towards a destination while the mobile drive unit is docked with an inventory holder;
undocking the mobile drive unit from the inventory holder;
determining a location of the inventory holder;
calculating a difference between the location of the inventory holder and the destination;
determining whether the difference is greater than a predetermined tolerance; and
in response to determining that the difference is greater than the predetermined tolerance;
while the mobile drive unit is undocked from the inventory holder, moving the mobile drive unit a distance determined based on the difference between the location of the inventory holder and the destination;
docking the mobile drive unit with the inventory holder; and
moving the mobile drive unit and the inventory holder towards the destination.
3 Assignments
0 Petitions
Accused Products
Abstract
A system for transporting inventory items includes an inventory holder capable of storing inventory items and a mobile drive unit. The mobile drive unit is capable of moving to a first point with the inventory holder at least one of coupled to and supported by the mobile drive unit. The mobile drive unit is additionally capable of determining a location of the inventory holder and calculating a difference between the location of the inventory holder and the first point. The mobile drive unit is then capable of determining whether the difference is greater than a predetermined tolerance. In response to determining that the difference is greater than the predetermined tolerance, the mobile drive unit is also capable of moving to a second point based on the location of the inventory holder, docking with the inventory holder, and moving the mobile drive unit and the inventory holder to the first point.
206 Citations
28 Claims
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1. A method for transporting inventory items, comprising:
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moving a mobile drive unit towards a destination while the mobile drive unit is docked with an inventory holder; undocking the mobile drive unit from the inventory holder; determining a location of the inventory holder; calculating a difference between the location of the inventory holder and the destination; determining whether the difference is greater than a predetermined tolerance; and in response to determining that the difference is greater than the predetermined tolerance; while the mobile drive unit is undocked from the inventory holder, moving the mobile drive unit a distance determined based on the difference between the location of the inventory holder and the destination; docking the mobile drive unit with the inventory holder; and moving the mobile drive unit and the inventory holder towards the destination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a drive module operable to propel the mobile drive unit towards a destination; a docking head operable to at least one of couple to or support an inventory holder when the apparatus is docked with the inventory holder; a control module operable to; cause the apparatus to undock from the inventory holder; determine a location of the inventory holder; calculate a difference between the location of the inventory holder and the destination; determine whether the difference is greater than a predetermined tolerance; and in response to determining that the difference is greater than the predetermined tolerance; while the apparatus is undocked from the inventory holder, cause the drive module to move the apparatus a distance determined based on the difference between the location of the inventory holder and the destination while the mobile drive unit is undocked from the inventory holder; cause the apparatus to dock with the inventory holder; and cause the drive module to move the apparatus and the inventory holder towards the destination. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for storing inventory items, comprising:
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an inventory holder operable to store inventory items; and a mobile drive unit operable to; move towards a destination while at least one of coupling to and supporting the mobile drive unit; undock from the inventory holder; determine a location of the inventory holder; calculate a difference between the location of the inventory holder and the destination; determine whether the difference is greater than a predetermined tolerance; and in response to determining that the difference is greater than the predetermined tolerance; while the mobile drive unit is undocked from the inventory holder, move a distance determined based on the difference between the location of the inventory holder and the destination; dock with the inventory holder; and move the inventory holder towards the destination. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A system for transporting inventory items, comprising:
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means for moving a mobile drive unit to towards a destination while the mobile drive unit at least one of supports or couples to an inventory holder; means for undocking the mobile drive from an inventory holder; means for determining a location of the inventory holder; means for calculating a difference between the location of the inventory holder and the destination; means for determining whether the difference is greater than a predetermined tolerance; and means, responsive to the means for determining whether the difference is greater than the predetermined tolerance, for; while the mobile drive unit is undocked from the inventory holder, moving the mobile drive unit a distance determined based on the difference between the location of the inventory holder and the destination; docking the mobile drive unit with the inventory holder; and moving the mobile drive unit and the inventory holder towards the destination.
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Specification