Abstract: A reel has a spool member on which the linear material is spooled, an electric motor that rotates the spool member, and a controller that controls the operation of the motor. The controller monitors an unwound length of the linear material based on sensed rotation of the spool member by one or more sensors. The controller causes the motor to wind the linear material at a drag speed when the linear material is on a ground, at a crawl speed lower than the drag speed when the length of linear material on the ground is shorter than a first threshold amount and through a second predetermined amount once the linear material lifts off the ground to inhibit swing of the linear material as it comes off the ground, and at a docking speed greater than the crawl speed when the unwound linear material is shorter than the second threshold amount.

Abstract: A wheel lock configured for use in a movable apparatus is disclosed herein. In various embodiments, the movable apparatus can include a leg structure and a wheel rotatably mounted with respect to the leg structure. A wheel lock can extend through the wheel. The lock can have a first position in which the lock prevents rotation of the wheel from rotating and a second position in which the lock does not prevent rotation of the wheel. The second position can be axially displaced relative to the first position.

Abstract: An electrical cord can include a cord segment with an electrical connector. The connector can connect to a spool member of an electrical cord reel to form an electrical connection between the electrical cord and the electrical cord reel. The spool can have a recess that engages and/or mates with the connector. When the connector is in the recess, at least a portion of the connector can be flush with a cylinder surface of the spool. The connector can be secured in the recess with one or more fasteners (e.g., screws). The connector and recess can have members that act as the primary load bearing members when spooling and unspooling the electrical cord to inhibit the application of loads on the electrical connection during rotation of the spool member.

Abstract: An electrical cord can include a cord segment with a receptacle. The receptacle can have a surface and apertures that accept a plug to form an electrical connection between the plug and wires of the electrical cord. A wear ring can be on the receptacle. The wear ring can be at least as large as the receptacle in a transverse cross-section. The wear ring can inhibit or prevent at least a portion of the surface from contacting a ground surface when the receptacle is on the ground surface or is dragged along the ground surface.