Concealed sprinkler

A sprinkler comprising:

• a body having a proximal portion defining an opening and a distal portion defining an outlet disposed along a longitudinal axis, the body defining an internal passageway between the proximal opening and the outlet defining a first diameter, the distal portion including an annular wall having an outer surface and an inner surface to further define a chamber distal of the outlet;
• a deflector assembly including a pair of arms and a deflector, the deflector assembly having a first position with the deflector disposed within the chamber and a second position with the deflector distal of the first position, the deflector including a face portion disposed perpendicular to the longitudinal axis and a hood portion extending substantially orthogonally to the face portion, the face portion including a central hole with two through holes disposed about the central hole, the pair of arms extending through the two holes to support the deflector in a telescopic manner;
• and
• a closure assembly including:
• a closure element;
• and
• a trigger assembly including:
• a lever assembly engaged with the inner surface of the annular wall to support the deflector assembly including two levers, each lever having a surface angled with respect to the longitudinal axis, each lever having a width with respect to the longitudinal axis;
• a bridge element having a first outer edge and a second outer edge with an entirely planar surface between the first and second outer edges that is disposed perpendicular to the longitudinal axis, each outer edge engaging the surface of one of the two levers to provide a point of contact between the bridge element and the two levers for load transfer, the bridge element having a width with respect the longitudinal axis that is greater than the width of each lever;
• and
• a thermally responsive plate assembly, each of the two lever members having a first end engaged with the thermally responsive plate assembly and a second end engaged with the distal portion of the body so that the two lever members engage the bridge element such that the closure element is disposed adjacent the outlet of the body.

A sprinkler comprising:

• a body having a proximal portion defining an opening and a distal portion defining an outlet disposed along a longitudinal axis, the body defining an internal passageway between the proximal opening and the outlet defining a first diameter, the distal portion including an annular wall having an outer surface and an inner surface to further define a chamber distal of the outlet;
• a deflector assembly including a deflector distal of the outlet disposed within the chamber;
• and
• a closure assembly including:
• a closure element and a trigger assembly, the trigger assembly including:
• a thermally responsive plate assembly;
• a lever assembly engaged with the inner surface of the annular wall to support the deflector assembly including two lever members each having a surface angled with respect to the longitudinal axis, each of the two lever members having a first end engaged with the plate assembly and second end engaged with the distal portion of the body;
• and
• a bridge element to support the deflector assembly within the chamber, the bridge element having a first end and a second end defining a length of the bridge element to bridge the two lever members and define a point of contact between the bridge element and the two lever members, wherein the bridge element includes a planar surface and a pair of walls about the planar surface to define a channel straddled about the two lever members, the surface including a central opening between the first and second end, the planar surface being disposed perpendicular to the longitudinal axis,
• wherein the planar surface includes an entirely planar surface between the central opening and each of the first and second ends.

A sidewall sprinkler comprising:

• a sprinkler body having a proximal portion defining an inlet and a distal portion having an internal surface forming an outlet, the body defining an internal passageway between the inlet and the outlet extending along a longitudinal axis, the distal portion including an annular wall having an outer surface and an inner surface having an internal shelf to define a chamber distal and an opening of the chamber distal of the outlet;
• a deflector assembly including a deflector, the deflector assembly having a first position with the deflector disposed within the chamber and a second position with the deflector distal of the first position, the deflector including a face portion disposed perpendicular to the longitudinal axis and a hood portion extending substantially orthogonally to the face portion, the face portion including a central hole with two through holes disposed about the central hole, the deflector assembly including no more than two arms extending through the two holes to support the deflector in a telescopic manner;
• a closure assembly including a biasing element placed in sealing engagement with the internal surface forming the outlet of the sprinkler body when the deflector assembly is in the first position;
• and
• a trigger assembly to support the deflector assembly in the first position, the trigger assembly including:
• a thermally responsive plate assembly distal of the chamber opening to control operation of the sprinkler between an unactuated and an actuated state of the sidewall sprinkler;
• a lever assembly including a first lever member and a second lever member diametrically disposed from one another about the longitudinal axis, each lever member having with a first end engaged with the shelf and a second end engaged with the thermally responsive plate assembly in the unactuated state;
• a bridge element having a first end and a second end with a planar surface and a pair of parallel walls extending between the first and second end to define a channel straddled about the first and second lever members to bridge the first and second lever members for support of the deflector assembly in its first position, each of the first end and the second end of the bridge element being in point of contact with the lever assembly, the planar surface including a central opening between the first and second end, the planar surface being imperforate between the walls and between the central opening and each of the first and second ends;
• and
• a set screw and an intermediate member, the set screw being threaded through the central opening of the bridge element to abut the intermediate member in the unactuated state of the sprinkler and support the deflector assembly in its first position and place the biasing element in sealing engagement with the internal surface forming the outlet of the sprinkler body.

A sprinkler, comprising:

• an internal passageway having an inlet and an outlet extending along a longitudinal axis;
• an annular wall having an outer surface and an inner surface to further define a chamber in communication with the internal passageway, a distal edge of the annular wall further defining an opening distal of the outlet in communication with the chamber;
• a deflector assembly including a deflector plate, the deflector plate having a first position distal of the outlet and disposed within the chamber and a second position distal of the distal opening;
• a closure assembly including a closure element engaged with the deflector plate such that when the deflector plate is in the first position the closure element is disposed within the outlet of the passageway;
• and
• a trigger assembly including:
• a lever assembly engaged with the inner surface of the annular wall to support the deflector assembly in the first position;
• and
• a thermally rated plate assembly having a substantially planar surface portion that is sized so as to substantially cover the distal opening and a lip portion framing the substantially planar surface portion, the plate assembly being engaged with the lever assembly such that the lip portion extends towards the inlet of the passageway beyond the distal edge of the annular wall.