Patent ID: 11958083
Assignee: JOHNSON CONTROLS TYCO IP HOLDINGS LLP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 8:
9. A sash system, comprising:
a sash;
a counter-weight coupled to the sash by a coupling member;
a locking mechanism coupled to at least one of the sash and the coupling member and transitionable between an open configuration where the locking mechanism does not inhibit movement of the at least one of the sash and the coupling member, and a locked configuration where the locking mechanism inhibits movement of the at least one of the sash and the coupling member; and
a controller coupled to the locking mechanism and configured to control operation of the locking mechanism to selectively transition between the open configuration and the locked configuration based on a condition of the sash;
wherein the sash and the counter-weight are configured such that when the locking mechanism is in the open configuration, the sash lowers due to gravity wherein the coupling member comprises an upper segment and a lower segment;
wherein the upper segment is coupled to a top of the sash and a top of the counter-weight;
wherein the lower segment is coupled to a bottom of the sash and a bottom of the counter-weight.