Patent ID: 6024174
Filing Date: 2000-02-15
Classification: A62C

Abstract:
A sprinkler head for dispensing fire fighting material, said sprinkler head comprising:a core, said core including a core top surface, a core bottom surface and a vertical core sidewall connecting said core top surface and said core bottom surface thus to define a cylindrical cavity therein, said cylindrical cavity defining a large diameter top section and a small diameter bottom section;a fire fighting material supply conduit extending through said core top surface and in communication with said large diameter top section of said cavity;at least one fire fighting material dispensing port extending through said vertical core sidewall and in communication with said small diameter bottom section of said cavity, said at least one fire fighting material dispensing port includes a plurality of fire fighting material dispensing ports radially and equidistantly arranged about said small diameter bottom section of said cavity for dispensing fire fighting material in a predetermined spray pattern;a piston within said cavity, said piston including a main piston body, a top sealing disc and a bottom sealing disc, said top sealing disc and said bottom sealing disc each having an external diameter substantially equal to said small diameter;an ambient temperature sensor within said cavity; andan activating rod having a first and a second end, said activating rod first end being attached to said bottom sealing disc, and said second end being attached to said ambient temperature sensor; whereinin a first closed position, said piston top sealing disc is positioned within said small diameter bottom section and thereby seals said large diameter top section from said small diameter bottom section to interrupt flow of fire fighting material from said fire fighting material supply conduit to said at least one fire fighting material dispensing port;in a second open position said piston top sealing disc is positioned within said large diameter top section and thereby allows flow of fire fighting material from said large diameter top section to said small diameter bottom section and from said fire fighting material supply conduit to said at least one fire fighting material dispensing port;said ambient temperature sensor biasing said activating rod to move said piston to said first closed position when the ambient temperature is below a predetermined activation temperature; andsaid ambient temperature sensor biasing said activating rod to move said piston to said second open position when the ambient temperature is above said predetermined activation temperature.