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
Belt with light
Tiered cost model for access to a computer network
Multi-contoured yoga support
Candle holder
Mobile device mode control based on dual mapping of availability (presence) information
Liquid dispensing apparatus
Stage drive method and stage unit, exposure apparatus, and device manufacturing method
  Randomly Featured Patents
Miniature rose plant named `Savasorc`
Difluorovinylsilane insecticidal and acaricidal agents
Equipment and system for reading out X-ray information stored in a stimulatable phosphor layer
Digital personal assistant docking station camera
Microvector control for edge and joint following
Wireless communication device, a wireless communication system and a wireless communication method
Shock absorber
Method of producing .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride
Window mount ski rack