Movable base with control surface

摘要

In a further embodiment, a method of controlling a base assembly can be provided. An actuation member can be pumped to deploy one or more wheels to lift a base assembly on said wheels. Further, a pin can be received in a holding portion on a semi-planar contoured surface in response to the pumping of the actuation member. The wheels can be held in a deployed position via the pin being held in the holding portion. Further pumping of the actuation member can separate the pin from the holding portion and retract the wheels from the deployed position.

主权项

1. A control mechanism comprising:
an actuating member movably coupled to a housing; a transmission rod coupled to the actuating member such that actuation of the actuating member causes the transmission rod to translate relative to the housing; a pin mounted to the transmission rod; a control plate rotatably mounted to the housing, the control plate comprising a contoured surface substantially defining a pin path wherein the pin can move from a first stable position and enter into a second stable position along the path upon a first actuation of the actuating member, and the pin can exit the second stable position and return to the first stable position along the path upon a second actuation of the actuating member; and wherein motion of the transmission rod causes the pin to move between the first and second plate positions.