Proximity detector system for a medical diagnostic device

Details Proximity detector system for a medical diagnostic device Proximity detector system for a medical diagnostic device

1978-11-03

1981-07-28

Reese, Randolph A.

Motor vehicles

With means for controlling operation responsive to...

Radiation, force, or waves reflected from external object or...

246187C, 303100, 307360, 340661, B60T 712

Patent

active

042805805

ABSTRACT:
A mobile medical diagnostic device having a mobility chassis with two supporting wheels and a central steerable drive wheel. The device has an electrical power steering system controlled by two synchronized handles operable by wrist action of an operator walking behind the device. The handles include a rotatable grip for controlling the velocity of the device. Advancing the grip actuates the throttle to the drive wheel and retarding the grip actuates a proportional electromechanical braking system. The device includes a proximity detector system which uses ultrasonic transducers to determine when an obstacle is within close proximity to the device, and automatically actuates the brake system. A window signal is established on the basis of both a preselected distance from the device within which it is desirable to apply the brakes, and a delay function which is determined by the distance of the front portion of the device from the transducer. If an object is within the window, the brakes are automatically actuated.

REFERENCES:
patent: 3152326 (1964-10-01), Merlo
patent: 3192382 (1965-06-01), Allison
patent: 3493920 (1970-02-01), MacMunn
patent: 3513931 (1970-05-01), Warner et al.
patent: 4026654 (1977-05-01), Beaurain
patent: 4079802 (1978-03-01), Kawata
patent: 4084149 (1978-04-01), Driver et al.

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