Patent ID: 8656642

Claim:
A segmented door and corresponding doorframe assembly of physical dimensions, comprising (a) a main door, being a rectangular planar structure having, sequentially, a top surface, a convex trailing edge, a bottom surface, and a leading edge; (b) a rectangular cutout formed by the excision of approximately the lower half of the leading edge of said main door, said cutout having a horizontal segment and a vertical segment oriented parallel to the main door leading edge; (c) a rectangular leaf door of dimensions corresponding to the dimensions of said cutout, said leaf door further having, sequentially, a top surface, a trailing edge, a bottom surface, and a leading edge, (d) a doorframe having interior dimensions corresponding to the exterior outer perimetral dimensions of said main door, further having, sequentially, an inner top surface, an outer top surface, a concave inner rear surface, an outer rear surface, a top threshold, a bottom threshold, an inner front surface, and an outer front surface; (e) a means for pivotally attaching and abutting the convex trailing edge of said main door against the concave inner rear surface of said doorframe, thereby forming a major pivotal means; (f) a spring-loaded means for pivotally attaching the leaf door within said cutout such that the trailing edge of said leaf door abuts the vertical segment of said cutout, thereby forming a minor pivotal means; (g) a means for periodically latching the leading edge of said main door to the inner front member of said doorframe; (h) a means for latching the top surface and bottom surface of said main door to the inner top surface and the threshold of said doorframe, respectively; and (i) a means for periodically latching the bottom of said leaf door to the threshold of said doorframe; wherein said spring-loaded means for pivotally attaching the leaf door further comprises directional spring loading in a manner such as to retain the leaf door flush in the same plane as the main door during static fully open or fully closed conditions of the main door and, upon closing of the main door and simultaneously encountering a firm object between the leaf door and said doorframe inner front surface, such as to provide an inhibition of the full closing and abutment of said leaf door against said doorframe.