Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Mirac proteins
Display screen with transitional icon
Flexible lighting devices
Landscape post for solar and other light fixtures
Wrench
Color imaging device
Alkaline battery
  Randomly Featured Patents
Ink jet recording apparatus
Terminated inductive coil assembly
Lifting device for templates
Inscribing system
Seam position control for laser processing
Apparatus for forming a composite structure
Course-correction system for course-correctable objects
Selectable resolution image capture system
Adhesive bandage and package
Fungicidal active compound combinations