Patent Blog
  • Contribute
  • Recommend
  • Subscribe
  • Login
  • Our Services

TODAY’S PATENT – DOOR OPENER FOR BUS AND THE LIKE

  • Older
  • Newer

TODAY’S PATENT – DOOR OPENER FOR BUS AND THE LIKE

The DOOR OPENER was invented by William F. Blair (Midlothian, TX) and Patrick Downey (Fort Worth, TX) on the 1st of March 1983, bearing patent number US4375140A.

This invention relates to door openers for busses and the like. More particularly, it relates to door openers for buses having a pair of doors disposed on respective door shafts on each side of a door opening for being pivoted opened and closed as desired by an operator responsive to an operators switch at the control position.

The said invention work by connecting the two door shafts with a central door bell crank that would simultaneously open and close both the doors with a motor. The motor shall be connected to the central bell crank to provide controlled pivotal motion to the two door shafts. A safety override is adapted to disengage the motor to allow the door to be opened manually in the event of an emergency. The major objective of the invention is to allow for easier and safer operation of rear bus doors controlled by the driver with the help of an electric switch.

  • Categories
    Today's Patent
  • Author

    Tanya Janghel

Leave a Reply Cancel Reply

Your email address will not be published. Required fields are marked *

Related Posts

TODAY’S PATENT- AUTOMATIC PAGE TURNING APPARATUS

TODAY’S PATENT – NECK ROLL APPARATUS AND METHOD

TODAY’S PATENT – METHOD OF AND APPARATUS FOR REDUCING ENGINE SMOKE EMISSIONS

Lex Protector

International Law Office

🇺🇸 +1 888 890 6411

Ip Enforcement

  • Copyright Enforcement
  • Utility Patent Enforcement
  • Design Patent Enforcement
  • Trademark Enforcement

Copyright Registration

  • USA Copyright Registration
  • Indian Copyright Registration
  • Amazon Brand Registration

Subscribe

© Copyright 2020. All rights Reserved

  • Terms & Conditions
  • Privacy Policy

Contribute

Recommend

    Subscribe