Patent ID: 6471145
Filing Date: 2002-10-29
Classification: B05B

Abstract:
A pistol nozzle of lawn sprinkler comprising:a handle comprised of, in an interior, a water admitting channel; a barrel connected with the handle and comprised of, in an interior, a water discharging channel; and a water control device disposed in a receiving slot which is located at the juncture of the water admitting channel of the handle and the water discharging channel of the barrel; wherein said water control device comprises: a base tube comprising an open end, a closed end, and a stop edge located in a hollow interior thereof such that said hollow interior is divided by said stop edge into a first chamber, and a second chamber which is comprised of an insertion slot, and a guide slot, said guide slot being comprised of a through hole in communication with said closed end, said base tube further comprised of a water admitting hole corresponding in location to said water admitting channel of the handle, said base tube further provided with a water discharging hole corresponding in location to said water discharging channel of the barrel; a valve rod pivoted in said second chamber of said base tube such that an inner end of said valve rod is extended into said first chamber of said base tube, said inner end of said valve rod being comprised of a piston which is located between said water admitting hole and said water discharging hole of said base tube, said valve rod further provided at an outer end thereof with a knob pillar, said knob pillar jutting out of said closed end of said base tube via said through hole of said guide slot of said second chamber of said base tube, said valve rod further comprising in an outer wall, a plurality of one-way ratchet slots, an urging projection, and a recess located between said ratchet slots and said urging projection; a recovery element disposed in said base tube such that one end of said recovery element urges said piston of said valve rod, and that another end of said recovery element urges an inner wall of said receiving slot, said recovery element serving to provide said valve rod with a force enabling said valve rod to slide toward an outer end of the barrel of the pistol nozzle; a retaining member comprised of a seat plate, a first transmission piece, and a second transmission piece, with said first transmission piece and said second transmission piece being pivoted to an underside of said seat plate, said retaining member being mounted on said base tube such that said seat plate is inserted into said insertion slot of said base tube, and that said retaining member is corresponding in location to said ratchet slots of said valve rod, said second transmission piece having an inclined stop portion serving in conjunction with said ratchet slots to prevent said valve rod from sliding in a backward direction, said first transmission piece and said second transmission piece being provided respectively with a transmission portion enabling said first transmission piece in motion to actuate said second transmission piece to turn, said first transmission piece being further comprised of a serrated portion engageable with said urging projection of said valve rod; and a locating member comprising a plurality of locating portions which are arranged at an interval corresponding to an interval of said ratchet slots of said valve rod, said locating member further comprising a slot in which a ball, a position confining body, and a spring are disposed such that said spring is located between said ball and said position confining body whereby said ball is located by said locating portions at such time when said valve rod slides; said water admitting hole of said base tube being completely blocked by said piston of said valve rod at such time when said valve rod is pushed by the force of said recovery element to slide such that said piston is stopped by said stop edge of said base tube; said water admitting hole of said base tube being partially obstructed by said piston of said valve rod at such time when said knob pillar of said valve rod is being exerted on by an external force, thereby causing said stop portion of said second transmission piece to engage in sequence said ratchet slots of said valve rod, and causing said ball of said locating member to be located in sequence by said locating portions of said locating member, said partially-obstructed water admitting hole of said base tube being completely blocked once again by said piston of said valve rod at such time when said knob pillar of said valve rod is relieved of the external force exerting thereon, thereby causing said valve rod to slide such that said stop portion of said second transmission piece is located in said recess of said valve rod, and that said serrated portion of said first transmission piece is pushed by said urging portion of said valve rod so as to actuate said first transmission piece to turn, and that said second transmission piece is actuated to turn by said first transmission piece in motion so as to cause said stop portion of said second transmission piece to remain in a disengagement state disabling said stop portion of said second transmission piece to engage said ratchet slots of said valve rod.