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An industrial cart has a caster interface which allows for the quick changing of wheel casters on the cart without the use of tools. The caster interface forms a three-sided pocket into which a wheeled caster seats. A plate of the caster seats within the pocket through an open end of the pocket. A l

An industrial cart has a caster interface which allows for the quick changing of wheel casters on the cart without the use of tools. The caster interface forms a three-sided pocket into which a wheeled caster seats. A plate of the caster seats within the pocket through an open end of the pocket. A locking mechanism is used to quickly and easily secure the caster into the pocket.

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1. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open en

1. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end, said edge being proximate to said open end of said pocket when said caster plate is seated in said pocket;a member attached to one of said walls, said member capable of being moved to a first position where the member does not interfere with insertion of the caster plate into the pocket and capable of being moved to a second position which is proximate to the caster plate such that the member is capable of being engaged with the edge of said caster plate and said member does not extend through said caster plate. 2. The assembly of claim 1, wherein said member is a flexible arm having a hook end, said flexible arm capable of being flexed such that the hook end is positioned in the first position or in the second position. 3. The assembly of claim 2, wherein said flexible arm is formed of spring steel. 4. The assembly of claim 1, wherein said member is rotatably mounted and is capable of being rotated to be positioned in the first position or in the second position. 5. The assembly of claim 4, wherein said member has a hook end, said hook end overhanging the edge of the caster plate. 6. The assembly of claim 4, wherein said member has an enlarged head and is capable of being rotated to be positioned in the first position or in the second position. 7. The assembly of claim 1, wherein said member is a slide bolt comprised of an outer tubular housing having a slot and an internal slide having a protrusion extending through the slot, said internal slide capable of being slid along said slot such that said protrusion is positioned in the first position or in the second position. 8. The assembly of claim 7, wherein said slide bolt is spring-loaded. 9. The assembly of claim 1, wherein at least one of said walls is formed by support members which form a frame for carrying equipment. 10. The assembly of claim 1, wherein said wheels are connected to the caster plate by a swivel connection. 11. The assembly of claim 1, wherein said member can be engaged without the use of tools. 12. The assembly of claim 1, wherein said member is mounted in a housing, said housing having a passageway therethrough in which said member is mounted, said member being movable along said passageway to move said member from said first position to said second position. 13. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a pin attached to one of said walls forming said pocket, said wall to which said pin is attached having an aperture provided therethrough to allow the pin to extend therethrough, said pin engaging with said caster plate to secure said caster plate within the pocket, said pin capable of being moved to an upper position where the pin does not interfere with insertion of the caster plate into the pocket or capable of being moved to a lower position which is proximate to the caster plate such that the pin is capable of being engaged with the caster plate. 14. The assembly of claim 13, wherein said pin is spring-loaded and has a handle attached thereto. 15. The assembly of claim 13, wherein said pin is magnetic. 16. The assembly of claim 13, wherein said pin is mounted in a housing which is mounted to said one of said walls forming said pocket. 17. The assembly of claim 13, wherein said pin has a first portion and a second portion which is enlarged relative to said first portion, said enlarged second portion is larger than said aperture. 18. The assembly of claim 13, wherein said caster plate has at least one aperture therethrough which is spaced from said edge, and said member extends through said aperture when said member is in said lower position. 19. A method of attaching a wheeled caster to a frame for carrying equipment, comprising: providing a frame having a pocket thereon, said pocket having an open end;moving a member to a first position where the member does not interfere with insertion of a wheeled caster into the pocket;inserting said wheeled caster into said pocket, said wheeled caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said edge being proximate to said open end of said pocket when said caster plate is seated in said pocket; andmoving said member to a second position which is proximate to the edge of the caster plate such that the member is capable of being engaged with the edge of the caster plate and the member does not extend through said caster plate, wherein said engagement is performed without the use of tools. 20. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a flexible arm having a hook end mounted to one of said walls forming said pocket, said flexible arm engaging with said caster plate to secure said caster plate within the pocket, said flexible arm capable of being of being flexed such that the hook end is positioned in a first position where the flexible arm does not interfere with insertion of the caster plate into the pocket or capable of being moved to a second position which is proximate to the caster plate such that the hook end is capable of being engaged with the caster plate. 21. The assembly of claim 20, wherein said flexible arm is formed of spring steel. 22. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a member having a hook end overhanging the edge of the caster plate, said member being rotatably mounted to one of said walls forming said pocket, said member engaging with said caster plate to secure said caster plate within the pocket, said member capable of being rotated to a first position where the member does not interfere with insertion of the caster plate into the pocket or capable of being rotated to a second position which is proximate to the caster plate such that the member is capable of being engaged with the caster plate. 23. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a member rotatably mounted to one of said walls forming said pocket, said member having an enlarged head, said member engaging with said caster plate to secure said caster plate within the pocket, said member capable of being rotated to a first position where the member does not interfere with insertion of the caster plate into the pocket or capable of being rotated to a second position which is proximate to the caster plate such that the member is capable of being engaged with the caster plate. 24. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a slide bolt mounted to one of said walls forming said pocket, said slide bolt comprised of an outer tubular housing having a slot and an internal slide having a protrusion extending through the slot, said side bolt engaging with said caster plate to secure said caster plate within the pocket, said internal slide capable of being slid along said slot such that said protrusion is positioned in a first position where the slide bolt does not interfere with insertion of the caster plate into the pocket or capable of being moved to a second position which is proximate to the caster plate such that the protrusion is capable of being engaged with the caster plate. 25. An assembly comprising: walls forming a pocket with an open end;a caster comprising a caster plate having an upper surface, a lower surface and an edge, and at least one wheel extending from said lower surface of said caster plate, said caster plate seating within said pocket through said open end;a member attached to one of said walls, said member capable of being moved to a first position where the member does not interfere with insertion of the caster plate into the pocket and capable of being moved to a second position which is proximate to the caster plate such that the member is capable of being engaged with said caster plate, said member remaining attached to said one of said walls when said member is in said first position and when in said second position. 26. The assembly of claim 25, wherein said member is a flexible arm having a hook end, said flexible arm capable of being flexed such that the hook end is positioned in the first position or in the second position. 27. The assembly of claim 25, wherein said member is rotatably mounted and is capable of being rotated to be positioned in the first position or in the second position. 28. The assembly of claim 25, wherein said member is a slide bolt comprised of an outer tubular housing having a slot, and an internal slide having a protrusion extending through the slot, said internal slide capable of being slid along said slot such that said protrusion is positioned in the first position or in the second position. 29. The assembly of claim 25, wherein said member is a pin, said wall to which said pin is attached having an aperture provided therethrough to allow the pin to extend therethrough. 30. The assembly of claim 25, wherein at least one of said walls is formed by support members which form a frame for carrying equipment. 31. The assembly of claim 25, wherein said member can be engaged without the use of tools.