초록 ▼

The present invention is for a backpack sprayer which has a reservoir tank fixedly attached to a support frame, the tank having a fill opening located at the top end and a pressure vessel located therein. The pressure vessel has a pump housing located therein which has a one way check valve leading

The present invention is for a backpack sprayer which has a reservoir tank fixedly attached to a support frame, the tank having a fill opening located at the top end and a pressure vessel located therein. The pressure vessel has a pump housing located therein which has a one way check valve leading into the pressure vessel, the pump housing also having a cylinder actuated by a hand crank for compressing the sprayed liquid into the pressure vessel. The pressure vessel expels the compressed liquid through a hand held wand operated by the user.

대표청구항 ▼

A backpack sprayer, comprising: a reservoir tank fixedly attached to a support frame, said tank having a top and a bottom portion; a fill opening located at said top portion of said reservoir tank; a pressure vessel located within said reservoir tank and affixed to said bottom portion of said reserv

A backpack sprayer, comprising: a reservoir tank fixedly attached to a support frame, said tank having a top and a bottom portion; a fill opening located at said top portion of said reservoir tank; a pressure vessel located within said reservoir tank and affixed to said bottom portion of said reservoir tank; a pump housing located within said pressure vessel forming a cylinder therein and having a one way check valve, said pump housing in flow communication with said reservior tank; a reciprocating pump rod attached at a first distal end to a pump cup located within said cylinder, said pump cup having an open interior portion and angled sides, said open interior of said pump cup facing said one way check valve; a pump cup retainer having a annular flange, said pump cup retainer interposed between said pump rod and said pump cup, said pump cup retained in place by said annular flange of said pump cup retainer; means to adjustably seal said pump rod at the point of entry into said cylinder; a pressure release conduit extending from said pressure vessel to said reservoir tank and having a pressure release valve therein; means to adjust said pressure release valve external of said reservior tank and said pressure vessel; and, a spraying wand in flow communication with said pressure vessel and having a manually operable spring valve.