Patent ID: 9464476
Filing Date: 2016-10-11
CPC Classification: E06B

Claim Text:
1. A tunnel for use with a pet door having an interior frame and an exterior frame located on opposing sides of a structural unit, each of the interior frame and the exterior frame defining a through opening, the tunnel comprising: a first horizontal wall component having a first connector at one end and a second connector at a second end; a second horizontal wall component having a first connector at one end and a second connector at a second end; a first vertical wall having a first connector at one end and a second connector at a second end, the first connector of the first vertical wall being selectively connectable to the second connector of the second horizontal wall component, the second connector of the first vertical wall being selectively connectable to the first connector of the first horizontal wall component; and a second vertical wall having a first connector at one end and a second connector at a second end, the first connector of the second vertical wall being selectively connectable to the second connector of the first horizontal wall component, the second connector of the second vertical wall being selectively connectable to the first connector of the second horizontal wall component, the first horizontal wall component, the second horizontal wall component, the first vertical wall, and the second vertical wall forming a first section defining a through opening, the first section being selectively connectable to the interior frame; a third horizontal wall component having a first connector at one end and a second connector at a second end; a fourth horizontal wall component having a first connector at one end and a second connector at a second end; a third vertical wall having a first connector at one end and a second connector at a second end, the first connector of the third vertical wall being selectively connectable to the second connector of the fourth horizontal wall component, the second connector of the third vertical wall being selectively connectable to the first connector of the third horizontal wall component; and a fourth vertical wall having a first connector at one end and a second connector at a second end, the first connector of the fourth vertical wall being selectively connectable to the second connector of the third horizontal wall component, the second connector of the fourth vertical wall being selectively connectable to the first connector of the fourth horizontal wall component, the third horizontal wall component, the fourth horizontal wall component, the third vertical wall, and the fourth vertical wall forming a second section defining a through opening, the second section being selectively connectable to the exterior frame and telescopically connectable to the first section, the second section through opening cooperating with the first section through opening to define a passageway.