Patent ID: 7175056

Claim:
A sprayer device ( 10 ) with a trigger-operated pump comprising: a body ( 14 ) provided with a base that can be applied to the mouth of a liquid container and a delivery nozzle ( 15 ) wherefrom the liquid is sprayed, in said body ( 14 ) being formed a plunger chamber ( 20 ), an input duct ( 37 ) which puts the inside of the container into communication with said chamber ( 20 ) and an output duct ( 38 ) which puts said chamber ( 20 ) into communication with the sprayer nozzle ( 15 ), through an input hole ( 34 ) and an output hole ( 35 ) respectively, formed in the rear wall of said chamber ( 20 ), a trigger lever ( 29 ) hinged to said sprayer body ( 14 ) and to the stem ( 32 ) of a plunger ( 33 ) tightly acting in said chamber ( 20 ) defined in the sprayer body ( 14 ), spring means ( 60 ) interposed between said trigger ( 29 ) and said sprayer body ( 14 ), and a single suction and delivery valve ( 100 ) disposed inside said chamber ( 20 ) of the sprayer body to generate a first one-way passage between said input duct ( 37 ) of the sprayer body and said chamber ( 20 ) and a second one-way passage between said chamber ( 20 ) and said output duct ( 38 ) of the sprayer body, characterised in that a housing seat ( 36 ) suited to integrally engage a central portion ( 102 ) of the single valve ( 100 ) is disposed in said wall of the chamber ( 20 ), in a central position between said input hole ( 34 ) and said output hole ( 35 ).