Actuator Gap Control via Housing Protrusions

The patent introduces protrusions as intermediary elements that physically intervene between the mechanical actuator and the housing aperture. These protrusions act as mediators that automatically maintain the required gap through their geometric configuration, eliminating the need for tight tolerances on the actuator and housing surfaces themselves. The protrusions translate the gap maintenance function into a simple geometric constraint that is easy to manufacture.

The patent changes the geometric parameters of the housing by adding protrusions with specific dimensions and positions. Instead of controlling the gap through tight tolerances on large surfaces, the design transforms the problem into controlling the gap through the fixed geometry of small protrusions. This parameter change allows for looser tolerances on the main components while maintaining precise gap control through the protrusion geometry.

The protrusions are designed as simple geometric features that can be easily integrated into the housing manufacturing process, such as through injection molding or CNC machining. These protrusions reliably prevent actuator binding by maintaining the necessary clearance, while their simple geometry keeps manufacturing costs low compared to producing tight-tolerance surfaces across large areas.

The patent shifts the tolerance requirements from critical gap dimensions to the geometry of the protrusions themselves. By changing the design parameters to use fixed protrusion dimensions rather than surface-to-surface clearances, the manufacturing process becomes more cost-effective. The protrusion geometry can be controlled with standard tolerances, significantly reducing manufacturing cost while maintaining reliable actuator operation.