Back to results
US 2001/0033226 A1Published application
Advance warning brake light system
OwnerDavid H. Levy, John R. Howattinventors
Life of this patent
Estimating the term…
Abstract
A brake light system is arranged to respond to movement within an r.f. field to provide a signal used to activate the brake light when movement within the r.f. field exceeds a predetermined velocity.
Claims12
An early warning brake light system comprising:
- a sensor generating an r.f. field and an output signal sensitive to movement within the r.f. field;
- and
- means responsive to the sensor output signal for activating the brake light when movement within the r.f. field exceeds a predetermined velocity.
An early warning brake light system comprising:
- a sensor generating an r.f. field and an output signal sensitive to movement within the r.f. field;
- and
- means responsive to the sensor output signal for activating the brake light when movement within the r.f. field exceeds a predetermined velocity and direction.
An early warning brake light system comprising:
- a sensor generating an r.f. field and an output signal sensitive to movement within the r.f. field;
- and
- means responsive to the sensor output signal for activating the brake light when movement within the r.f. field exceeds a predetermined velocity, distance, and direction.
A method of activating an early warning brake light in a vehicle comprising the steps of:
- providing an electrical signal indicating displacement, Dm, between a vehicle driver's foot and a vehicle brake pedal at time Tm;
- providing an electrical signal indicating displacement, Dn, between a vehicle driver's foot and a vehicle brake pedal at time Tn;
- determining the velocity of foot movement, Vf, between times Tm and Tn;
- and
- activating the brake light when the velocity, Vf, of foot movement exceeds a predetermined threshold velocity, Vthresh.
2 more elements
An early warning brake light system comprising:
- a sensor generating an electrical signal in response to velocity of movement;
- and
- means responsive to the electrical signal for activating the brake light
Dependencies are inferred from the claim text.