Ex Parte Fitzgibbon - Page 4

                Appeal 2007-1838                                                                             
                Application 10/118,523                                                                       
                external elements such as vehicle incline, temperature, motor strength, track                
                stiffness, and weather seal tightness (col. 3, ll. 19-25).                                   
                      6.  The control module also uses the door speed data at different                      
                positions before closing to determine the duty cycle of the drive motor to                   
                apply the proper closing force to the door (col. 3, ll. 39-47).                              
                      7.  The duty cycle of the door is adjusted via pulse width modulated                   
                (PWM) signals applied thereto when the door reaches the predetermined                        
                positions (col. 3, ll. 47-49).                                                               
                      8.  Cook further discloses that the pulsed input signals are also used                 
                for obstruction detection, wherein an increase in the expected time interval                 
                between input signals indicates that force is being applied to the door as well              
                as the force being applied by the door to an obstruction (col. 3, ll. 60-65).                
                      9.   Cook discloses that if the interval of a second plurality of pulses               
                exceeds that of first pulses, the control module determines that the force                   
                exerted by the motor to the door exceeds a selected force threshold,                         
                indicating that the door has encountered an obstruction (col. 3, l. 65 through               
                col. 4, l. 4).                                                                               
                      10.  Cook further discloses that during a door closing operation, if the               
                interval of the sample size exceeds a selected percentage, the system                        
                determines that an obstacle has locked the door movement (col. 9, ll. 53-65).                
                Cook limits the maximum force imparted by drive motor to the door and by                     
                the door to an obstruction (col. 9, l. 66 through col. 10, l. 3).                            
                      11.  Cook provides for tracking the door position by allowing the                      
                control module to learn where the value zero for fully closed door is or learn               
                from the pulse count the position of a fully open door (col. 6, ll. 15-33).                  



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