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
Measuring device and measuring method that use pulsed electromagnetic wave
Pyrazole kinase modulators and methods of use
Facial recognition using a sphericity metric
Expandable mobile device
Nonaqueous secondary battery with nitrile group-containing compound
Image processing device, image processing method, and program
Snap-engagement structure
  Randomly Featured Patents
Method and apparatus for forming melt spun nonwoven webs
Electrically programmable fuse bit
Plunger seal ring
Cross-copolymerized olefin/aromatic vinyl/diene copolymer and process for producing the same
Apparatus for bending thin-walled pipes
Method for percutaneous intramedullary nailing of tibial shaft fractures
Machine for spreading out cardboard boxes automatically
Assay for ligands to tyrosine kinase receptors
Method for correlating well logs
Apparatus and means for remotely launching and securely retrieving a trailered watercraft