IP Library › Patent Application 11687389
Patent Application
App. No. 11/687,389

METHOD OF SYNCHRONIZING ADJUSTMENT OF PEDAL LEVERS IN A STEPPER MOTOR DIRECT DRIVE ADJUSTABLE PEDAL ASSEMBLY

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
11/687,389
Abstract

A pair of adjustment mechanisms ( 21, 41 ) interconnect a support ( 12 ) and first ( 14 ) and second ( 34 ) pedal levers. The adjustment mechanisms ( 21, 41 ) adjust the operational position of the pedal levers ( 14, 34 ) relative to the support ( 12 ). In particular, a stepper motor ( 52 ) and screw ( 32 ) unit moves the respective pedal levers ( 14, 34 ) along rods ( 28, 48 ). A controller ( 56 ) sends pulses of energy to each of the motors ( 52 ), measures a time to reach a predetermined resistance condition of each motor ( 52 ) during each pulse, and terminates energy to both motors ( 52 ) in response to the time being below a predetermined time period in any pulse to either motor ( 52 ), thereby synchronizing the movement of both pedal levers ( 14, 34 ).

Claims (6)

1 . A method of synchronizing the adjustment of first ( 14 ) and second ( 34 ) pedal levers with first and second stepper motors ( 52 ) by the steps of:

sending pulses of energy to each of the motors ( 52 ),

measuring the time to reach a predetermined resistance condition of each motor ( 52 ) during each pulse, and

terminating energy to both motors ( 52 ) in response to the time being below a predetermined time period in any pulse to either motor ( 52 ).

2 . A method as set forth in claim 1 including the step of restarting the pulses after each termination of energy.

3 . A method as set forth in claim 1 including oscillating the energy in each pulse at a predetermined frequency.