Flexible dry sprinklers

A flexible dry fire protection sprinkler comprising:

• (A) an inlet having an inlet orifice;
• (B) an inlet seal assembly configured to seal the inlet orifice, and having a spring seal that compresses in response to a longitudinal load;
• (C) an inlet release unit configured to release the inlet seal assembly;
• (D) a flexible tube having an inlet end connected to the inlet release unit, and an outlet end;
• (E) a flexible linkage extending through the flexible tube, and having an inlet end connected to the inlet release unit, and an outlet end;
• (F) an outlet biasing portion connected to the outlet end of the flexible tube and to the outlet end of the flexible linkage, and configured to displace the outlet end of the flexible linkage upon activation of the flexible dry fire protection sprinkler;
• (G) a sprinkler body connected to the outlet biasing portion, the sprinkler body having an outlet orifice;
• and
• (H) an outlet seal assembly configured to seal the outlet orifice of the sprinkler body until ambient temperature reaches a predetermined temperature,
• wherein, when the ambient temperature reaches the predetermined temperature, the outlet seal assembly is released from the outlet orifice of the sprinkler body, and the outlet biasing portion displaces the flexible linkage in an outlet direction from a first position to a second position, causing the inlet end of the flexible linkage to operate the inlet release unit, thereby releasing the inlet seal assembly from the inlet orifice of the inlet.