An adjustable rack assembly includes a base frame defining an upper end and an open front side and an extension frame defining an upper end, a bottom end and an open front side. The extension frame is slidably mounted to the base frame. The assembly further includes an actuator coupled between the b
An adjustable rack assembly includes a base frame defining an upper end and an open front side and an extension frame defining an upper end, a bottom end and an open front side. The extension frame is slidably mounted to the base frame. The assembly further includes an actuator coupled between the base frame and the extension frame and operable to move the extension frame between a collapsed position and an extended position. A compartment unit is supported by the extension frame and is at least partially collapsible to accommodate the movement of the extension frame between the collapsed position and the extended position.
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1. An adjustable rack assembly, comprising: a base frame defining an upper end and an open front side;an extension frame defining an upper end, a bottom end and an open front side, the extension frame being slidably mounted to the base frame;an actuator coupled between the base frame and the extensi
1. An adjustable rack assembly, comprising: a base frame defining an upper end and an open front side;an extension frame defining an upper end, a bottom end and an open front side, the extension frame being slidably mounted to the base frame;an actuator coupled between the base frame and the extension frame and operable to move the extension frame between a collapsed position, in which the top end of the extension frame is adjacent to the top end of the base frame, and an extended position, in which the top end of the extension frame is moved away from the top end of the base frame and the bottom end of the extension frame is moved toward the top end of the base frame; anda compartment unit supported by the interior frame and being at least partially collapsible to accommodate the movement of the extension frame between the collapsed position and the extended position. 2. The adjustable rack assembly of claim 1, wherein the upper side of the base frame is open to receive the extension rack therethrough. 3. The adjustable rack assembly of claim 1, wherein: the lower end of the extension frame is open; andthe compartment unit extends through the open lower end of the extension frame when the extension frame is in the extended position. 4. The adjustable rack assembly of claim 3, wherein the open bottom end of the extension frame is continuously open to the open front side of the extension frame. 5. The adjustable rack assembly of claim 1, wherein: the base frame includes a plurality of first support members arranged in a first prism; andthe extension frame includes a plurality of second support members arranged in a second prism. 6. The adjustable rack assembly of claim 5, wherein the second prism is sized to fit within the first prism. 7. The adjustable rack assembly of claim 1, wherein the actuator is mounted with the base frame adjacent a center of a bottom side of the base frame and oppositely couples with a cross member bisecting a top side of extension frame. 8. The adjustable rack assembly of claim 1, wherein the actuator is a linear actuator driven by an electric motor. 9. The adjustable rack assembly of claim 1, wherein the actuator is a hydraulic actuator. 10. The adjustable rack assembly of claim 1, wherein the compartment unit includes an arrangement of flexible fabric columns with rigid horizontal members spaced at vertical intervals along the columns. 11. The adjustable rack assembly of claim 10, wherein the compartment unit accommodates the extending and collapsing of the extension frame with respect to the base frame by portions of fabric ones of the plurality of rigid members within the collapsible portion folding to allow ones of the rigid members to move closer together with movement of the extension frame to the collapsed position. 12. The adjustable rack assembly of claim 1, wherein the base frame is configured to rest on a surface by defining a generally planar lower end having a plurality of wheels coupled therewith. 13. The adjustable rack assembly of claim 1, wherein the open front side of the extension frame is aligned with the open front side of the base frame when the extension frame is in the collapsed position. 14. A transportation rack, comprising: a base unit configured for resting on a surface and including a lower interior side and an upper side;an extension unit slidably mounted with the base unit and defining an upper member coupled on an upper end of the extension unit;means for automatically driving movement of the extension unit relative to the base unit, such movement including in an extending direction, wherein the upper end of the extension unit moves away from the upper side of the base unit, and in a collapsing direction, wherein the upper end of the extension unit moves toward the upper side of the base unit; anda compartment unit supported by the extension unit and having a collapsible portion therealong that accommodates the extending and collapsing of the extension unit with respect to the base unit, the compartment unit defining a channel therethrough to receive the means for automatically driving movement, wherein: the compartment unit includes an arrangement of flexible fabric columns with rigid horizontal members spaced at vertical intervals along the columns; andthe compartment unit accommodates the extending and collapsing of the extension unit with respect to the base unit by portions of fabric ones of the plurality of rigid members within the collapsible portion folding to allow ones of the rigid members to move closer together in the collapsing direction. 15. The transportation rack of claim 14, wherein: the base unit is a base frame including a plurality of first support members defining a first prism wherein the upper end and a front side between the upper side and the lower interior side are generally open; andthe extension unit is an extension frame including a plurality of second support members defining a second prism wherein the bottom end and a front side thereof are generally open. 16. A method for providing parts to a production line, comprising: selectively removing parts from a lower section of a compartment unit of a rack, the rack including a base unit defining an upper end and an extension unit slidably mounted with the base unit, the lower section of the compartment having an expanded height and being accessed through an open front side of the base unit;when the parts have been removed from the lower section, lowering the extension unit with respect to the base unit, the compartment unit partially collapsing by reduction of the lower section of the compartment unit to a collapsed height to accommodate the lowering of the extension unit; andremoving parts from an upper portion of the compartment unit through the open side of the base unit and through an open side of the extension unit. 17. The method of claim 16, wherein the rack is a first rack in an assembly of coupled racks, each of the racks including a base unit defining an upper end and an extension unit slidably mounted with the base unit, the method further including transporting the assembly of coupled racks to an assembly location. 18. The method of claim 16, wherein the step of lowering the extension unit is carried out using an actuator coupled between the base unit and the extension unit. 19. The method of claim 18, wherein the actuator is a linear actuator driven by an electric motor, the method further including electrically coupling the motor with a control unit and using the control unit to control the actuator.
Harber, Blair Lawrence; Mathews, Lynette Raville; Hunninck, Adam Brian; Simmons, Leonard Gene, Methods of operating maintenance carts with air filtration.
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