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US 6,009,668 AGranted
Power door operator having rotary drive and drive operated direct panel lock
AssigneeWestinghouse Air Brake Company
InventorRedreddy Sukumar Reddy
Life of this patent
Estimating the term…
Abstract
A lock assembly, for a door panel of a transit vehicle, has its locking action directly driven by the door operator into which it is incorporated. The locking assembly holds the door panel in a closed position through direct contact with the door panel, providing improved reliability by bypassing intermediate components of the door operator.
Claims7
In combination:
- a rotary helical drive and an actuator horizontally disposed over an opening in a side wall of a passenger vehicle, said actuator including a drive nut on said helical drive, said drive nut attached to a door panel for reciprocating said door panel over and away from said opening in said side wall, thereby opening and closing said opening in said side wall, and a lock actuated by said helical drive for retaining said door panel in a closed and locked position over said opening in said side wall, said lock comprising:
- means rotating said helical drive;
- a lock cam attached to and rotating with one end of said helical drive;
- a lock actuating pin on said lock cam, said lock actuating pin extending inwardly therefrom and along said helical drive;
- first toggle means on said drive nut, said first toggle means advancing toward said lock actuating pin on rotation of said helical drive, said rotation moving said door panel from open to closed positions over said opening in said side wall;
- and
- second toggle means on a baseplate, said second toggle means actuated by said first toggle means and including a panel lock member, said panel lock member coacting with said door panel for retaining said door panel in said closed position when said second toggle means is actuated;
- wherein rotation of said actuator advances said drive nut to said door closed position, and said lock actuating pin actuates said first toggle means, actuating said second toggle means whereby said panel lock member maintains said door panel in said closed position.
5 more elements
In combination:
- a lock for a door operator having a rotary helical drive member and a cooperating nut running on said helical drive member for linear movement therealong on rotation of said helical drive member, said cooperating nut moving a door panel to closed and open positions over an opening in a side wall of a vehicle, comprising:
- an operator baseplate for mounting said door operator on said side wall of said vehicle;
- helical drive member on said baseplate;
- a nut running on said helical drive member;
- a door panel hanger attached to said cooperating nut;
- means rotating said helical drive member;
- lock means on an end of said helical drive member, said lock means extending perpendicularly therefrom;
- and
- toggle means intermediate said cooperating nut and said baseplate, said toggle means actuated by said lock means as said cooperating nut travels to said door closed position, said toggle means coacting with said door panel hanger to maintain said door panel in said door closed position;
- wherein rotation of said helical drive member moves said cooperating nut and said door panel to said closed position, actuating said toggle means and said lock means thereby locking said door panel.
7 more elements
A door panel lock for a power door operator that uses a rotatable helical drive member in moving a door panel of a transit vehicle between open and closed positions, said power door operator being mounted to a baseplate attached to said transit vehicle, said door panel lock comprising:
- a door drive nut assembly driven by and movable along said helical drive member for moving said door panel between said open and said closed positions;
- lock means affixed to said helical drive member approximate one end thereof, said lock means having a first pin extending inwardly towards said door drive nut assembly;
- door hanger means, connected to said door drive nut assembly, attaching said door panel and said door drive nut assembly;
- first toggle means, disposed on said door drive nut assembly, for actuation by said lock means via said first pin thereof when said helical drive member has rotated beyond a point at which is needed to move said door drive nut assembly and said door panel therewith to said closed position;
- and
- second toggle means, linked to said baseplate, for actuation by said first toggle means upon actuation of said first toggle means with said lock means;
- such that rotating said helical drive member beyond said point at which said door panel is in said closed position causes said lock means to fully engage said first toggle means and said first toggle means to fully engage said second toggle means thereby locking said door panel in said closed position.
4 more elements
Dependencies are inferred from the claim text.