Pet door
AssigneeNorth States Industries, Inc.
InventorEverett C. Pennock
Life of this patent
Estimating the term…
Abstract
A door for closing an opening through a pet confining wall in a building, kennel, pen or the like, said door having a peripheral frame for mounting in the wall opening, a door member having its upper edge portion hinged to the frame on a horizontal axis for swinging movement of the door in either direction from a vertical closed position within the frame, and a spring tensioned slide acting between the frame and a cam on the upper edge of the door to yieldably retain the door in closed position.
Claims4
In a pet door assembly for mounting in an opening in a shelter wall to permit entrance or exit of an animal pet at its will,
- a. a frame for mounting on the wall to define a doorway within said opening,
- b. a flat door having substantially the same shape and size as said doorway positioned to close the doorway and having its upper portion hinged to the frame on a horizontal axis for swinging movement of the door from a normal vertical closed position within the doorway to open positions in either direction,
- c. said door having an upwardly facing cam on the upper edge thereof, said cam having a dome shape in cross section perpendicular to the plane of the door and having rounded cam surfaces connected by a flat central portion which is parallel to the upper edge of the door,
- d. a slide member mounted on the upper portion of the frame for vertical sliding movement and having a flat bottom face in flush engagement with the flat central portion of the cam, and
- e. spring means disposed between the slide and the frame to yieldably retain said face and portion in such flush engagement.
Dependencies are inferred from the claim text.