Patent ID: 6112821
Filing Date: 2000-09-05
Classification: A62C

Abstract:
A sprinkler head comprising:a main body 1 having a tubular upper body 1a connected to a water distribution pipe in a ceiling 8 and a lower frame 1b extending downward from the upper body 1a wherein a shoulder 1e provided with a valve seat 1d at the lower, inner circumference of the upper body 1a is formed and a plurality of lugs 1g facing inward are formed at the lower, inner circumferential portion of the lower frame 1b,a nozzle 2 which is movable up and down inside the upper body 1a, has an outwardly flared nozzle retainer 2b at the upper end portion to be engaged with the shoulder 1e for prevention of the downward movement of the nozzle 2 and has a plurality of discharge apertures 2a at its lower portion,a cap 3 which is fixed air-tightly to the lower end of the nozzle 2 and has a packing 3e at the outer circumferential portion thereof to be rested on the valve seat 1d of the upper body 1a,a holder 4 which is supported by engagement with the lugs 1g of the lower frame 1b, has a pressure screw 6 at the center of its lower face and has inclined surfaces 4f at the upper portion thereof which water under pressure from the top is to hit such that the holder 4 is rotated by allowing water under pressure to hit the inclined surfaces 4f for disengagement of the holder 4 from the lugs 1g and allowing the holder 4 to drop off, anda glass bulb 5 which is situated vertically between the lower face of the cap 3 and the holder 4 and presses the cap 3 against the valve seat 1d by pressing force of the pressing screw 6.