Movable or removable closures – Mounted for optional movements – One closure movable separately from or with other closure
Patent
1994-04-08
1995-04-18
Kannan, Philip C.
Movable or removable closures
Mounted for optional movements
One closure movable separately from or with other closure
49245, 49394, E05D 1548
Patent
active
054067480
ABSTRACT:
A pet door apparatus that allows an animal to enter and exit an enclosure. The pet door includes a frame element defining an opening in the enclosure that has a top frame portion, and a flap element that closes the opening. The flap element has a top portion and extends, in a first orientation, substantially vertically downward from the top portion. The flap top portion includes a horizontally extending pivot element for pivotably moving the flap in response to an applied horizontal force. The flap top portion includes a camming element that vertically moves the top frame portion relative to the frame top portion during pivotal movement of the flap away from the generally vertical position. The opening defined by the frame element has a wider top that tapers to a narrower bottom. The flap is correspondingly tapered to seat within the frame element. The pet door further includes a locking element for preventing the flap from moving in a selected direction substantially transverse to the flap, when the flap is disposed in the first orientation. The locking element preferably includes an exit locking element for preventing movement of the flap in a first direction, thereby allowing an animal to exit the enclosure through the door, and an enter locking element, independent of the exit locking element, for preventing movement of the flap in a second direction opposite the first direction, thereby allowing an animal to enter the enclosure through the door. The exit locking element and the enter locking element include a locking lever and a locking plate. The locking lever includes a main body having a handle portion integrally formed at a first end, and a chamfered second end. The locking plate has an eccentric chamfered through bore that is substantially complementary in configuration to the locking lever second end, and is movable between a locked position and an unlocked position by rotating the locking lever in a predetermined direction.
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