Dosatron International

Philippe Duquennoy

Sebastien Furet

Christophe Charriere

Sandrine Lambinet

Dominique Berton

Matthieu Darbois

Sébastien Furet

Manal Badii

Richard Mahieux

A metering mechanism including a metering element that is translatably mounted in a jacket, the jacket being mounted in an adjusting sleeve that can cooperate with the jacket by way of a screwing movement, the screwing/unscrewing movement causing a translatory movement of the metering element; at one end, the metering element is provided with a check valve, and at the other end, same accommodates a plunger, the reciprocating translatory movement of which creates suction at the end of the element provided with the valve, followed by expulsion into a volume surrounding the other end of the metering element via a passage formed in at least one first sealing device and in a second sealing device. A proportioning pump including a metering mechanism of the type as well as to a method for using a pump of the type in at least two metering ranges.

Metering mechanism for a proportioning pump, and associated pump and usage method

A diaphragm pump having a body including a suction connection and a discharge connection, a suction valve and a discharge valve; a control chamber in which the diaphragm is disposed, and a working chamber located on the side of the diaphragm opposite the control chamber; a control pipe suitable for linking the control chamber to a control connection of the body, the control pipe configured to alternately apply a vacuum and a pressure on the diaphragm; the body includes a housing oriented transversely relative to the control pipe, the housing being open towards the outside at one end, and closed at the other end by a bottom including a suction opening and a discharge opening, the diaphragm being positioned close to the bottom, and held by a cap engaged in the housing, the cap having a recess forming the control chamber, linked to a passage communicating with the control pipe.

Pump having a cap retaining a diaphragm in a receptacle

Metering device for introducing a liquid additive into a main liquid flowing along a pipe, includes a pump for withdrawing additive from a container and metering it, this pump including a first inlet for receiving a flow of main liquid which drives the pump, a second inlet for picking up additive and an outlet for the resulting mixture; a Venturi installed in the pipe, and connected in parallel with the pump, the first pump inlet connected by a first line to the Venturi inlet while the outlet connected by a second line to the Venturi throat; a first element for varying the restriction at the Venturi neck, and a second element sensitive to the pressure drop across the pump for controlling the first element to reduce the bore section when the pressure drop across the pump increases, and increase the bore section when the pressure drop across the pump decreases.

Controllable constriction device for the throat of a venturi channel for introducing a liquid additive into a stream of main liquid

A static mixer (M) for homogenizing a mixture of at least two liquids, especially after injection of an auxiliary liquid (L) into a main liquid (L), includes: a closed container (), with an inflow conduit () extending from a first wall of the container, up to the vicinity of the opposite wall, and an outflow conduit () which is substantially parallel to the inflow conduit, each conduit being provided with a device () for connecting to the outside, through the wall of the container.

Static mixer for homogenizing a mixture of at least two liquids and dosing device provided with such a mixer

Proportional dosimeter including a metering body with a main liquid inlet () and an outlet (), a hydraulic motor () housed in the body, actuated by the main liquid, and connected to a plunger piston () that moves in a first chamber (), the piston plunger drawing in fluid in an outbound stroke, a check valve provided to allow liquid to pass to the interior volume of the body when the pressure in the first chamber exceeds a certain pressure, during the return stroke; the dosimeter includes a second chamber () of variable volume bounded by a membrane subjected to the pressure in the first chamber, the second chamber including an intake orifice () for the auxiliary liquid and a delivery orifice () for the auxiliary liquid, this delivery orifice being connected by a pipe () to an injection chamber (S) situated downstream of the outlet of the dosimeter body.

Proportional dosimeter for metering an auxiliary liquid into a main liquid

Hydraulic machine, in particular hydraulic motor, comprising a casing, a differential piston () having a region of large cross section and a region of smaller cross section, which can slide with a reciprocating movement respectively in the casing and in a housing coaxial to, and of smaller diameter than, the casing, the piston separating two chambers of the casing and being provided at the location of its large cross section and its small cross section with sealing lips () which are oriented in opposite directions and which face one another. The sealing lips () are provided on detachable circular rings (), and the piston () is molded in one piece.

Hydraulic machine, in particular hydraulic motor, with a reciprocating movement, and differential piston for such a machine

Hydraulic machine includes: a casing; a piston slidable therein and separating two chambers; hydraulic switching elements for supplying liquid to and for evacuating the chambers, including at least one connecting rod acting on a distribution member which can adopt two stable positions; and initiating elements having a pusher which, at the end of the piston stroke, can cause a sudden change in the position of the switching elements, under the action of an elastic member to reverse the stroke. Each end of the elastic member is secured to an articulation member respectively accommodated in a housing provided on the connecting rod and on another moving part, each housing being open in a direction substantially opposed to the direction of the force exerted by the elastic member, such that each articulation member can be removed from its open housing against the action of the force, thereby simplifying assembly and disassembly.

Growing community of inventors

Camarsac, France

Philippe Duquennoy