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US 4,735,293 AGranted
Hatchway door for elevator system
AssigneeWestinghouse Electric Corp.
InventorsLynn R. Everhart, Charles E. Randall
Life of this patent
Estimating the term…
Abstract
A hatchway door for an elevator system which includes a smoke seal. The smoke seal includes a compression seal along the trailing edge of each door panel which engages as the panel reaches the fully closed position, an astragal seal along the leading edge which engages another panel or a return, and sealing arrangements associated with the top and bottom portions of each door panel which seal the associated gaps with a spring loaded cam action which translates horizontal movement of the door panel to vertical movement of each sealing arrangement.
Claims6
An elevator system, comprising:
- a building having an elevator hatchway, and an entranceway defining an opening to said hatchway, including a hatchway wall surrounding said opening,
- said entranceway having a hatch sill and a gib slot,
- a hatchway door having at least one door panel,
- said at least one door panel having vertically oriented leading and trailing edges, upper and lower portions, and a gib disposed in said gib slot for guiding the lower portion of said at least one door panel,
- means mounting said at least one door panel in said entranceway for horizontal, slidable movement between fully open and fully closed positions, to selectively open and close the opening to said hatchway while maintaining first and second clearance gaps between the lower and upper portions, respectively, of said at least one door panel and the entranceway,
- and first smoke sealing means for automatically sealing and unsealing said first clearance gap in response to closing and opening movements, respectively, of said at least one door panel,
- said first smoke sealing means including movable means mounted on said at least one door panel for guided rectilinear movement between sealed and unsealed positions, bias means carried by the at least one door for biasing said movable means towards said unsealed position, and bias opposing means disposed in said gib slot for opposing the bias of said bias means in response to said at least one door panel being within a predetermined dimension from said fully closed position,
- said movable means physically contacting said hatch sill when in said sealed position, with said physical contact occurring substantially simultaneously with the stopping of said at least one door panel at said fully closed position,
- said physical contact being broken substantially simultaneously with initial opening movement of said at least one door panel,
- whereby sliding contact between said movable means and said predetermined object is substantially eliminated.
7 more elements
Dependencies are inferred from the claim text.