Concealable window sprinkler
A concealable sprinkler head includes a frame having a body mountable to a fire suppression liquid source, a pair of frame arms and a pair of corresponding drop pins slidably engaged with a respective frame arm. A thermal trigger is supported within the sprinkler frame. A fluid deflector is secured to the drop pins and includes a generally horizontal surface. The drop pins extend substantially orthogonally from the horizontal surface. An inclined surface of the fluid deflector extends angularly upwardly from the horizontal surface. A concealing cup surrounds the frame arms. A cover plate is attached to the concealing cup, covering the distal end thereof, wherein the drop pins and the deflector are positioned within the concealing cup. The cover plate is removable from the concealing cup permitting the drop pins and the deflector to axially slide out of the concealing cup into an operational position.
1 . A sprinkler head comprising:
a sprinkler frame having a body mountable to a fire suppression liquid source, the body defining a proximal inlet, a distal outlet and an internal fire suppression liquid passageway extending therethrough;
a sealing plug maintaining the sprinkler head in a non-spraying state;
a thermal trigger operatively engaged with the sealing plug and configured to release the sealing plug upon activation of the thermal trigger;
a fluid deflector having a central horizontal portion bookended by two opposing side portions each angled relative to the central horizontal portion in a direction away from the body and an inclined surface extending angularly upwardly from a portion of a periphery of the central horizontal portion toward the sprinkler frame; and
a pair of drop pins secured to the fluid deflector, the sprinkler head being oriented in a pendent position and the pair of drop pins being slidable relative to the body from a compressed, non-activated position to an extended, operational position before activation of the thermal trigger, the drop pins extending substantially orthogonally from the fluid deflector.
2 . The sprinkler head of claim 1 , further comprising:
a concealing cup having a generally horizontal upper wall attached to, and horizontally outwardly projecting from, the body of the sprinkler frame, a skirting side wall extending axially distally therefrom, and an open base end, the pair of drop pins-frame arms being positioned within the concealing cup in the compressed, non-activated position thereof.
3 . The sprinkler head of claim 2 , further comprising:
a cover plate attached to the concealing cup, covering the open base end of the concealing cup and maintaining the pair of drop pins in the compressed, non-activated position, the cover plate being removable from the concealing cup at a predetermined temperature, permitting the pair of drop pins and the deflector to axially slide relative to the concealing cup into the extended, operational position.
4 . The sprinkler head of claim 1 , wherein the two opposing side portions of the central horizontal portion each define an included angle with the central horizontal portion between approximately 160° and approximately 180°.
5 . The sprinkler head of claim 1 , wherein the central horizontal portion of the fluid deflector is wider than each of the two side portions.
6 . A sprinkler head comprising:
a sprinkler frame having a body mountable to a fire suppression liquid source, the body defining a proximal inlet, a distal outlet and an internal fire suppression liquid passageway extending therethrough;
a sealing plug maintaining the sprinkler head in a non-spraying state;
a thermal trigger operatively engaged with the sealing plug and configured to release the sealing plug upon activation of the thermal trigger;
a fluid deflector having a central horizontal portion bookended by two opposing side portions each angled relative to the central horizontal portion in a direction away from the body and an inclined surface extending angularly upwardly from the central horizontal portion toward the sprinkler frame; and
a pair of drop pins secured to the fluid deflector, the sprinkler head being oriented in a pendent position and the pair of drop pins being slidable relative to the body from a compressed, non-activated position to an extended, operational position before activation of the thermal trigger, the drop pins extending substantially orthogonally from the fluid deflector,
wherein the central horizontal portion of the fluid deflector is between approximately four times (4×) and approximately five times (5×) wider than each of the two side portions of the fluid deflector.
7 . The sprinkler head of claim 1 , wherein the central horizontal portion of the fluid deflector includes a hemispherical projection generally axially aligned with the internal fire suppression passageway of the body of the sprinkler frame.
8 . The sprinkler head of claim 7 , wherein the hemispherical projection defines a diameter between approximately two times (2×) and approximately six times (6×) a thickness of the central horizontal portion of the fluid deflector.
9 . The sprinkler head of claim 1 , wherein the inclined surface comprises three discrete portions defined by a central segment and two opposing side ears each laterally spaced from the central segment.
10 . The sprinkler head of claim 9 , wherein the central segment is retracted further backward relative to the two opposing side ears in a direction away from the pair of drop pins.
11 . The sprinkler head of claim 9 , wherein the central segment is oriented substantially orthogonally to the central horizontal portion of the fluid deflector.
12 . The sprinkler head of claim 9 , wherein at least a portion of each of the side ears is angled inwardly toward the pair of drop pins relative to a plane of the central segment of the inclined surface.
13 . The sprinkler head of claim 9 , wherein the central segment is wider than each of the two opposing side ears.
14 . The sprinkler head of claim 13 , wherein each of the side ears defines a width between approximately 60% and approximately 80% of a width of the central segment.
15 . The sprinkler head of claim 9 , wherein a top surface of the central segment is V-shaped.
16 . The sprinkler head of claim 15 , wherein the V-shaped top surface of the central segment defines an included angle greater than or equal to approximately 170° and less than 180°.
17 . The sprinkler head of claim 1 , wherein the central horizontal portion defines a front surface contour in the form of an arcuate apex with linear slanted surfaces.