Patent ID: 8418400

Claim:
A liquid herbicide applicator for dispensing a liquid herbicide to kill weeds on contact, comprising: a length adjustable handle member; a reservoir configured to store the liquid removably coupled to said handle member, said reservoir defining an inlet through which the liquid is selectively inserted and an outlet through which the liquid is selectively withdrawn; a valve assembly coupled to said reservoir outlet and operative between an open configuration that allows the liquid to flow through said outlet and a closed configuration that prevents the liquid from flowing through said outlet; wherein said valve assembly is biased toward said closed configuration; a dispenser assembly having a cap portion operatively coupled to said valve assembly and an application portion connected to said cap portion, said cap portion being selectively movable closer to said valve assembly such that said valve assembly is urged toward said open configuration and selectively movable away from said valve assembly such that said valve assembly is urged toward said closed configuration; wherein said liquid is communicated from said valve assembly to said dispenser assembly application portion when said valve assembly is at said open configuration; wherein said valve assembly includes: a valve assembly upper end attached to a lower end of said reservoir, said valve assembly upper end defining an opening in fluid communication with said reservoir outlet; a valve assembly lower end that defines an opening, said valve assembly defining a bore extending between said valve assembly upper and lower openings; a seal that is movable between said valve assembly closed configuration in which said seal blocks said liquid from passing through said bore and said valve assembly open configuration in which said seal does not block said liquid from passing through said bore; an actuation plate connected to said seal that selectively moves said seal between said valve assembly closed and open configurations when upward pressure is applied against said actuation plate; a spring positioned between said seal and said actuation plate for biasing said seal toward said closed configuration; wherein said dispenser assembly cap portion includes: an actuation button positioned to bear against and apply upward pressure to said actuation plate when said cap portion is selectively moved closer to said cap assembly; at least one aperture through which said liquid flows from said reservoir to said application portion of said dispenser assembly; wherein: an outer surface of said valve assembly lower end includes a threaded configuration; and said cap portion of said dispenser assembly is threadably coupled to said valve assembly lower end such that operation of said cap portion moves said dispenser assembly one of closer to or away from said valve assembly, respectively, whereby threaded operation of said cap portion operatively moves said valve assembly between said open and closed configurations.