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 15:
16. A hood enclosure assembly, comprising:
a hood enclosure positioned within an environment and comprising a plurality of sidewalls forming a work chamber and a front aperture configured to permit airflow between the environment and the work chamber;
a sash adjustably coupled to the hood enclosure, wherein the sash is adjustable to cover at least a portion of the front aperture;
a counter-weight coupled to the sash by a coupling member;
a locking mechanism operatively coupled to at least one of the sash and the coupling member; and
a controller configured to control operation of the locking mechanism to selectively inhibit movement of the sash based on a condition of the sash;
wherein when the locking mechanism does not inhibit movement of the sash, the sash tends to lower, 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.