Fluid product dispensing pump
AssigneeValois SAS
InventorLudovic Petit
Life of this patent
Estimating the term…
Abstract
A fluid dispenser pump comprising a pump body (1) in which a piston (2) connected to an actuating rod (10) is slidably mounted in leaktight manner, said actuating rod (10) being mounted to slide inside an element (4), such as a ferrule, which is secured to the pump body (1), said fluid dispenser pump being characterized in that said actuating rod (10) includes a flexible outer tubular portion (11) that is in leaktight contact with said element (4), and a rigid inner tubular portion (12) that is concentric with said flexible outer tubular portion (11), the zone of contact between the inside of the ferrule (4) and the actuating rod (10) being leaktight regardless of the position of said actuating rod (10).
Claims5
1/ A fluid dispenser pump comprising a pump body (1) in which a piston (2) connected to an actuating rod (10) is slidably mounted in leaktight manner, said actuating rod (10) being mounted to slide inside an element (4), such as a ferrule, which is secured to the pump body (1), said fluid dispenser pump being characterized in that said actuating rod (10) includes a flexible outer tubular portion (11) that is in leaktight contact with said element (4), and a rigid inner tubular portion (12) that is concentric with said flexible outer tubular portion (11), the zone of contact between the inside of the ferrule (4) and the actuating rod (10) being leaktight regardless of the position of said actuating rod (10).
2/ A pump according to claim 1, in which the flexible outer tubular portion (11) has a first axial end (13) that is free, and a second axial end (14) that is secured to or integral with said actuating rod (10) and in particular integral therewith.
3/ A pump according to claim 1, in which both of the axial ends (13, 14) of the flexible outer tubular portion (11) are secured to or integral with the actuating rod (10) and in particular integral therewith.
4/ A pump according to claim 3, in which a metering chamber (20) is defined between an inlet valve (21) and an outlet valve (22), the space (18) between the outer tubular portion (11) and the inner tubular portion (12) of the actuating rod (10) being part of said metering chamber (20).
5/ A fluid dispenser device including a pump according to any preceding claim.