US 11,952,814 B2
Door assembly for selectively interlocking opposing doors
Ayako Takase, Providence, RI (US); Robert Hutton, IV, Providence, RI (US); Patrick Scott Grossman, Grand Haven, MI (US); Lynn K. Van Sickle, Coopersville, MI (US); Tommy Leon Knight, Grand Rapids, MI (US); Dylan S. Schlenvogt, Holland, MI (US); and Brian Lafrence, Holland, MI (US)
Assigned to Larson Manufacturing Company of South Dakota, LLC, Brookings, SD (US)
Filed by Larson Manufacturing Company of South Dakota, LLC, Brookings, SD (US)
Filed on Dec. 29, 2022, as Appl. No. 18/090,672.
Application 18/090,672 is a continuation of application No. 17/074,385, filed on Oct. 19, 2020, granted, now 11,542,733, issued on Jan. 3, 2023.
Application 17/074,385 is a continuation of application No. 16/092,674, granted, now 10,808,438, issued on Oct. 20, 2020, previously published as PCT/US2017/027713, filed on Apr. 14, 2017.
Claims priority of provisional application 62/322,919, filed on Apr. 15, 2016.
Prior Publication US 2023/0243195 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E05B 65/04 (2006.01); E05B 9/10 (2006.01); E05B 47/00 (2006.01); E05B 63/14 (2006.01); E05B 63/16 (2006.01); E05C 7/02 (2006.01); E06B 1/70 (2006.01); E06B 3/36 (2006.01); E06B 7/23 (2006.01); E05D 3/04 (2006.01)
CPC E05C 7/02 (2013.01) [E05B 9/10 (2013.01); E05B 47/0038 (2013.01); E05B 63/14 (2013.01); E05B 63/16 (2013.01); E06B 1/70 (2013.01); E06B 3/362 (2013.01); E06B 7/2316 (2013.01); E05D 3/04 (2013.01); E05Y 2900/132 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A door assembly for selectively interlocking first and second opposing doors each pivotably mounted at a hinge side thereof to a door frame so as to both open and close in a same rotary direction, the door assembly comprising:
a first door handle assembly operatively mounted to the first door at a latch side of the first door opposite the hinge side thereof, the first door handle assembly carrying at least one first interlocking element having an interlock surface, and
a second door handle assembly operatively mounted to the second door at a latch side of the second door opposite the hinge side thereof, the second door handle assembly carrying at least one second interlocking element having an interlock surface, the first and second door handle assemblies arranged relative to each other with the first at least one interlocking element aligned with the second at least one interlocking element such that the interlock surfaces of an aligned pair of the first and second interlocking elements can couple with one another,
wherein the aligned pair of the first and second interlocking elements can be misaligned by rotation of a door handle of one of the first and second door handle assemblies while the other of the first and second door handle assemblies is restricted from rotation by a stop element limiting rotation in one rotary direction so as to separate the first and second door handle assemblies.