Trigger sprayer having central vent cylinder

Details Trigger sprayer having central vent cylinder Trigger sprayer having central vent cylinder

B - Operations, Transporting

67

D

B67D 7/64 (2010.01) B05B 11/00 (2006.01)

Patent

CA 2268877

A liquid dispenser (20) comprising a dispenser body (22) having a pump mechanism (50) defining a variable volume fluid receiving cavity (116). A cylindric formation (130), smaller than the fluid receiving cavity (116), is within the cavity (116) and a vent passageway (134) is in fluid communication with the cylindric formation (130). A plunger (132) is reciprocally moveable within the cylindric formation (130) and is configured for moving with the pump mechanism (50) as the pump mechanism (50) is moved between extended and contracted positions. The plunger (132) and cylindric formation (130) are configured such that the vent passageway (134) is in fluid communication with the fluid receiving cavity (116) of the pump mechanism (50) when the pump mechanism (50) is in its contracted position and is configured to block fluid communication between the vent passageway (134) and the fluid receiving cavity (116) when the pump mechanism (50) is in its extended position.

Distributeur de liquide (20) comprenant un corps (22) possédant un mécanisme de pompe (50) définissant une cavité (116) servant à recevoir un liquide de volume variable. Un cylindre (130), plus petit que la cavité (116), est situé à l'intérieur de ladite cavité (116) et un passage de ventilation (134) se trouve en communication fluide avec ledit cylindre (130). Un piston (132) est mobile de façon alternative à l'intérieur dudit cylindre (130) et est conçu pour se déplacer avec le mécanisme de pompe (50), simultanément au déplacement dudit mécanisme (50) entre une position étendue et une position contractée. Le piston (132) et le cylindre (130) sont conçus de telle sorte que le passage de ventilation (134) se trouve en communication fluide avec la cavité (116) du mécanisme de pompe (50) quand celui-ci est en position contractée, et sert à bloquer ladite communication fluide entre le passage de ventilation (134) et la cavité (116) quand ledit mécanisme (50) est en position étendue.

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