Resources Contact Us Home
Shifter with shape memory alloy and safety

Image Number 19 for United States Patent #8117938.

A shifter incorporates a shape memory alloy wire (SMA actuator) to control movement of a blocker to selectively prevent moving a shift lever (or pawl) out of its park position until predetermined vehicle conditions are met. A mechanical fuse (i.e., flexible overload spring) prevents damage to the SMA actuator where the shift lever (or pawl) can be frictionally stopped from movement despite the contraction of the SMA actuator. The control circuit for the SMA actuator includes a photo-electric switch for stopping electrical power to the SMA actuator when the shift lever is moved from its park position, and the shift lever includes structure for mechanically continuing to hold the switch open while out of park. Further, the control circuit is operably connected to an ignition key retaining mechanism so that the ignition key cannot be removed when the lever is not in its park position.

  Recently Added Patents
Generating a representation of an object of interest
HSP20 inhibits amyloidogenesis and neurotoxicity
Navigating applications using side-mounted touchpad
Modified continuous phase modulation communications system and related methods
Power supply system for motor vehicle
Apparatus and method for multiple pagings in broadband wireless communication system
Alterable account number
  Randomly Featured Patents
Methods and apparatus for decoding and displaying different resolution video signals
Inline skating sports floor
Coding system for pay television
Container with label and golf balls
Methods for forming decoupling capacitors
Control of camera sensing direction in a viewable range defined by camera panning and tilting
Non-screeching laboratory article
Method for determining amount of water to be added to a NiCd cell
Static protection circuit for use in a semiconductor integrated circuit device
Method and system for identifying a paper form using a digital pen