摘要:
A piston device comprises a sleeve, a casing pipe, a first piston, a resilient member, and a second piston. The sleeve includes at least one hole arranged at the periphery of its closed end. The casing pipe has at least a through hole arranged on a lateral side thereof proximate to its closed end and is sheathed and connected to the sleeve by a manner that the open end of the casing pipe is faced toward the closed end of the sleeve. The first piston is arranged to sheathe the casing pipe at a position proximate to the closed end of the casing pipe for selectively covering and exposing the through hole by a reciprocate movement. The resilient member is installed in side the sleeve at a position between the closed end of the sleeve and the first piston while ensheathing the casing pipe therethrough. The second piston is arranged to sheathe the sleeve at a position proximate to its open end. Moreover, by combining the piston device with a container containing fluid and gas, a fluid/gas drawing apparatus can be formed, and, by combining the fluid/gas drawing apparatus with a nozzle, a foam producing apparatus capable of producing thick foams can be formed.
摘要:
An accumulator-type liquid sprayer includes a piston arranged in a cylinder, a piston guide extending through a passage extending therethrough in an axial direction of the piston, so as to be engageable with, and disengageable from the piston, cooperating with the piston and the cylinder to form a space region for sucking and pressurizing a liquid, a check valve for opening a suction port of the cylinder during suction of the liquid, and a hollow stem slidably fitted with an outer side of the piston in a liquid-tight manner and engaging with an end portion of the piston guide. A first resilient member urges the piston guide against the piston for maintaining a closed state of the passage in the piston, and a second resilient member urges the piston against the piston guide for adjusting a spraying pressure of the liquid. A stopper is arranged in the cylinder, for positioning the piston before the content is sprayed to provide increased contact surface pressure so as to maintain the closed state of the passage. The piston has an end portion which can be brought into contact with the stopper, and which is formed with an annular recess extending along an outer peripheral edge of the end portion.
摘要:
A fluid dispenser device includes a fluid tank, a dispensing pump (10) operating without air intake, a turret (20) supporting and fixing the pump (10), the turret being fixed on the tank by a fixing ring (30), the device being characterized in that at least a portion (21) of the turret (20) is made of a plastics material that is permeable to air.
摘要:
A metered output fluid dispenser adapted to discharge fluid during a selected section of a stroke which produces fluid discharge. The dispenser includes: a vertical hollow elongated body having a first hollow cylinder having a first diameter and an integral section defining a second hollow cylinder having a second and different diameter. A first piston is slidable throughout the length of the first cylinder and remains in continuous sealing relationship engagement with the inner wall of the first cylinder. A second piston is slidable through a selected section of the total length of the second cylinder. The second piston when traversing a selected portion of said selected section causes the dispenser to dispense fluid. The second piston is in sealing relationship with the inner wall of the second cylinder when and only when the second cylinder traverses said selected portion.
摘要:
A liquid dispenser includes a hollow shank having top and bottom openings and a fluid chamber. A closure member is sealingly mounted on the top opening. A hollow piston rod has closed and open ends, an inner fluid passage, and an aperture in communication with the fluid passage. A hollow piston is sleeved movably around the piston rod and has a contact part in contact with the piston rod to seal releasably the aperture, and a skirt part. A spring seat has a top rim extending between the skirt part and the closed end to abut against the contact part to seal releasably the aperture, a top blind hole having a cross-section greater than that of the closed end of the piston rod, and a bottom portion. An upper urging unit urges downward the piston. A ball is seated at the bottom opening. A lower urging unit urges the spring seat and the ball against the closed end and the bottom opening, respectively.
摘要:
A pump (1) has a tubular inlet portion (4) which is arranged to penetrate the mouth (27) of a container having a seal (29) in order to dispense liquid from the container. The pump has a body (2) connected to a housing (23) comprising holding means (25) which holds the container such that in a first position the inlet portion of the pump is external to the seal and in a second position the inlet portion extends through the seal into a reservoir (30) to allow liquid to be dispensed. In the second position, the inlet portion projects into the reservoir to an extent sufficient to displace a volume of liquid filling the inlet channel (6) of the pump and occupying the pump chamber (3). The pump is thereby rendered self priming by the initial movement between the first and second positions which at the same time disrupts the seal. The pump is particularly useful for the nasal administration of liquid sprays from an ampule having an elastomeric seal closure or a duck bill valve.
摘要:
A precompression pump has a cylindrical housing 1 containing a slidable annular plunger 3 controlled by a push-rod 40 which slides in the plunger, and includes an outlet passage 41a, 42a leading to the housing via a side opening 42b. The plunger has an axial annular lip 4 that interacts with the push rod to block or clear the side opening, the push rod being connected to the plunger by a spring 47 which pushes the plunger back into a position in which the side opening is blocked. The spring urges the plunger towards an annular ram 44 which urges the lip 4 radially towards the push rod 40 by wedging it. The ram is configured to abut the plunger 3 outwardly of the lip and at a site distinct therefrom, thereby limiting movement of the ram 44 and the plunger towards each other, and thus limiting the radial force applied to the plunger lip 4.
摘要:
Fluid dispensing apparatus comprising:(a) an atomizer unit (11) for fluid to be dispensed,(b) a non-pressurized remote reservoir (15) for the fluid, and(c) a fluid path, including a flexible conduit (13), between the atomizer unit (11) and the remote reservoir (15) to permit dispensing of non-gas-pressurized fluid in atomised form across a variety of locations remote from said reservoir (15).
摘要:
A pump for dispensing or spraying a fluid product comprises a pump body delimiting a pump chamber in which slides a piston. The pump comprises a hollow plunger-rod having an outlet passage. The plunger-rod is coupled to the piston to actuate the piston and to enable escape of the product. The pump further comprises an aspiration chamber which communicates with the hollow plunger-rod and which is reduced in volume when the plunger-rod is depressed and increased in volume when pressure is removed from the plunger-rod. The aspiration chamber is delimited by the piston and the plunger-rod and the volume of the chamber is varied by relative sliding movement between the plunger-rod and the piston.
摘要:
A trigger-type device for operating a pump of the axial displacement piston type against a bias spring, sprays liquids out of a handheld container. The pump has a delivery head which is movable axially with the piston and provided with a delivery conduit set at an angle to the displacement axis of the piston and lying in the same plane where the angular movement of the trigger lever takes place. The device includes a rocker lever which converts the angular movement of the trigger lever into a corresponding axial displacement of the delivery head to thereby drive the pump piston against the bias spring and produce the spray.