IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0047149
(1993-04-14)
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발명자
/ 주소 |
- Dunning Walter B. (21199 Christopher Cir. Sonora CA 95370) Bundschuh Robert L. (6534 Miami Lakes Dr. Miami Lakes FL 33014)
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| 인용정보 |
피인용 횟수 :
27 인용 특허 :
0 |
초록
▼
A spring (304) biases a movable housing part (12, 16) away from a fixed housing part (10, 306, 156). The fixed housing part (10, 306, 156) is composed only a main housing (10), a draw tube (306) and an inlet valve housing (156). The inlet valve housing (156) is inserted into the main housing (10). T
A spring (304) biases a movable housing part (12, 16) away from a fixed housing part (10, 306, 156). The fixed housing part (10, 306, 156) is composed only a main housing (10), a draw tube (306) and an inlet valve housing (156). The inlet valve housing (156) is inserted into the main housing (10). The movable housing part (12, 16) is composed of a forward housing (12), which includes a trigger (14), and a nozzle (16). The main housing (10), the inlet valve housing (156) and the forward housing (12) together form a variable volume pump chamber (318). The inlet valve (184, 268) includes , a valve plug (184) which is initially connected to a sidewall portion (168) of the inlet valve housing (156) by a frangible section (196). During assembly, an axial push is imposed on the valve plug (184), to sever the frangible section (196), and then move the valve plug (184) rearwardly past stop lugs (198, 200), into a position axially between the stop lugs (198, 200) and an inlet valve seat (268). The nozzle (16) is rotatable between an “open”position in which two sections (64, 97) of an outlet passageway are in alignment, to permit liquid flow from the pump chamber (318) to an outlet opening (46) and a “closed”position in which the two passageway sections (64, 97) are out of alignment, and flow out from the pump chamber (318) is blocked.
대표청구항
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In a liquid sprayer of a type comprising a fixed housing part and a movable housing part together defining a variable volume pump chamber between them, wherein said fixed housing part includes a liquid inlet passageway for delivering liquid from a reservoir into the pump chamber, and an inlet valve,
In a liquid sprayer of a type comprising a fixed housing part and a movable housing part together defining a variable volume pump chamber between them, wherein said fixed housing part includes a liquid inlet passageway for delivering liquid from a reservoir into the pump chamber, and an inlet valve, and said movable housing part includes a spray forming outlet and an outlet valve, wherein movement of the movable housing part towards the fixed housing part decreases the volume of the pump chamber, closes the inlet valve, opens the outlet valve, and forces liquid out from the pump chamber through the spray forming outlet, and wherein movement of the movable housing part away from the fixed housing part increases the volume of the pump chamber, closes the outlet valve, opens the inlet valve, and draws liquid through said inlet passageway into the pump chamber, the improvement characterized by; said inlet passageway including an annular sidewall, a forward end, and an internal valve plug socket which opens towards the pump chamber, said socket including an annular base and an annular inlet valve seat at said base, said movable housing part including an axially movable annular wall surrounding at least a forward portion of the annular sidewall of the inlet passageway, said annular wall forming a sidewall of the pump chamber; a seal between said annular wall and said annular side wall of said inlet passageway, said inlet valve including an axially elongated valve plug within said inlet passageway, said valve plug having a closure, first end directed towards the inlet valve seat, and an opposite, second end; said inlet passageway including an internal valve plug stop spaced axially from the inlet valve seat and confronting the second end of the valve plug, said valve plug stop being spaced rearwardly from the forward end of said inlet passageway, wherein when the inlet valve is closed the first end of the valve plug is against the inlet valve seat, and the second end of the valve plug is spaced axially from the valve plug stop, and wherein when the inlet valve is open the second end of the valve plug is against the valve plug stop, the first end of the valve plug is spaced axially from the inlet valve seat, and a liquid flow path is formed in the valve plug socket around the valve plug, through which liquid flows into the pump chamber.
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