A pet door assembly comprising, in combination:
- (a) a rectangular pane of glass having a top edge. a bottom edge, and a pair of spaced apart opposite side edges, said pane having had a rectangular portion removed from one of its lower corners to define an intermediate vertical edge parallel to the spaced apart side edges of said pane, and an intermediate horizontal edge parallel to the top and bottom edges of said pane;
- (b) a rectangular frame for surrounding said pane, said frame including:
- (i) a U-shaped top channel for receiving said to edge of said pane,
- (ii) a U-shaped bottom channel for receiving said bottom edge of said pane, and
- (iii) a pair of spaced apart U-shaped side channels for receiving said side edges of said pane;
- (c) a rectangular mounting element for attachment to said panel, said mounting element defining a passageway and including,
- (i) an H-shaped in cross section top channel member having an upwardly opening portion in which said intermediate horizontal edge of said glass pane is mounted and a downwardly opening portion which faces into the passageway of said mounting element,
- (ii) an H-shaped in cross section bottom channel member having an upwardly opening portion which faces into the passageway of said mounting element and a downwardly opening portion,
- (iii) a first H-shaped in cross section side channel member, said first H-shaped side channel member having an outwardly opening portion in which the intermediate vertical edge of said glass pane is mounted and an inwardly opening portion which faces into the passageway of said mounting element,
- (iv) a second H-shaped in cross section side channel member, said second H-shaped side channel member having an outwardly opening portion and an inwardly opening portion which faces into the passageway of said mounting element,
- (v) a first insert member mounted in the outwardly opening portion of said second H-shaped side channel member and projecting into one of said pair of U-shaped side channel members of said frame, and
- (vi) a second insert member mounted in said downwardly opening portion of said H-shaped bottom channel member and projecting into said U-shaped bottom channel member of said frame;
- and
- (d) a rectangular flap member mounted for swinging movement in said mounting element to selectively provide and block access through the passageway defined thereby, said flap member having a top edge mounted in the downwardly opening portion of said H-shaped top channel member of said mounting element, and free bottom and side edges.