Patent ID: 7458640
Filing Date: 2008-12-02
Classification: B60N

Abstract:
1. A power operated vehicle headrest assembly selectively adjustable between a plurality of alternate positions, said vehicle headrest assembly comprising: a vehicle seat including a back rest; a headrest directly conjoined to said back rest and selectively adaptable between raised and lowered positions when a transmission gear shifter of the vehicle is biased between forward and reverse driving positions; and means for automatically adapting said headrest between said raised and lowered positions when the vehicle is selectively biased between the forward and reverse driving positions such that a driver can effectively monitor surrounding driving conditions through a rear view window of the vehicle without having to manually recline said headrest; wherein said automatic adapting means is power operated and electrically coupled to an internal power supply source of the vehicle, said automatic adapting means being directly and operably connected to the transmission gear shifter such that the headrest automatically biases between the raised and lowered positions without requiring the driver to manually reposition the headrest while transitioning the vehicle between the forward and the reverse positions; wherein said automatic adapting means comprises: an elliptical motor selectively rotatable about clockwise and counter clockwise directions, said motor including a drive shaft oriented orthogonal to a vertical path along which said headrest is displaced within said groove, said elliptical motor further including an actuator arm having a linear shape and being provided with axially opposed end portions directly conjoined to said drive shaft and radially terminating away therefrom respectively; an elongated shaft having a longitudinal length greater than a longitudinal length of said actuator arm, said shaft having axially opposed end portions directly conjoined to said actuator arm and protruding upwardly beyond said top end of said back rest, said shaft being statically affixed to said actuator arm such that said shaft simultaneously moves along a vertical path corresponding to a rotary movement of said actuator arm, said rotary movement of said actuator arm being extending along an arcuate path defined between a maximum of two quadrants; and a upper flange pivotally connected directly to a top one of said shaft end portions and said headrest respectively, said upper flange including pivotally attached first and second sections wherein said second portion maintains a static and vertical relationship with said top end of said back rest while said first section selectively adapts between horizontal and vertical positions as said shaft vertical travels between raised and lowered positions respectively.