Patient Lift Quick-Release Coupling for Secure Rotating Attachment

The patent removes the complex microswitch-based security system and replaces it with a purely mechanical bayonet coupling system. The coupling mechanism itself provides the safety function through its geometric design, eliminating the need for separate detection devices and reducing overall system complexity.

The bayonet coupling system is self-checking through its mechanical design. The asymmetric geometry automatically prevents incorrect mounting attempts, and the locked/unlocked states are self-evident through the position of the coupling elements, requiring no additional sensors or control systems.

The patent uses visual indicators (different colors or markings on male and female coupling parts) to immediately show the correct orientation for coupling. This eliminates the need for electronic detection systems and allows users to quickly identify correct mounting orientation at a glance.

The mechanical bayonet coupling provides self-evident feedback through its physical state. When correctly coupled, the mechanism is locked in a specific position that is visually and tactilely apparent, eliminating the need for electronic sensors or complex status indicators.

The bayonet coupling uses asymmetric geometry where the male part has protrusions that must align with slots in the female part. This asymmetric design allows easy coupling in the correct orientation while preventing coupling in incorrect orientations, and the locked position is mechanically secure against unintentional release.

The rotating quarter-turn motion of the bayonet coupling creates a smooth, continuous locking action. The curved paths of the coupling elements during rotation ensure gradual engagement and secure locking, making unintentional release during normal operation highly unlikely.