Provided is an elastic member according to an embodiment. The elastic member includes an upper support, a lower support provided under the upper support, and at least one elastic part configured to connect the upper support to the lower support, wherein the elastic part includes an upper support portion formed downward from the upper support, a lower support portion configured to extend upwardly from the lower support, and a connecting portion configured to connect the upper support portion to the lower support portion with a predetermined inclination and to be bent and deformed when the elastic member is pressed.

A biasing member for use in reciprocating dispenser pumps is contemplated. The member is made completely of polymeric materials and is suitable as a direct replacement for metallic coil springs. The biasing member includes spiral shape defined by inner and outer helix traces, with a series of perforations provided along one or both of those traces. These perforations, in conjunction with thinned channels, the size and shape of holes, and the size and shape of apertures, all cooperate to allow for a spring with sufficient resilience and greater spring force in comparison conventional, all-polymer biasing members.

A multiple dose syringe has a first valve defining a first valve opening pressure and a second valve defining a second valve opening pressure. A storage chamber in fluid communication with the second valve stores multiple doses of a substance therein and includes an outlet for dispensing multiple doses of the stored substance therethrough. A compression surface is movable between first and second positions and defines a compression chamber between the compression surface and the first valve. Movement of the compression surface in a direction from the first position toward the second position dispenses substance in the compression chamber through the first valve and out of the syringe. Movement of the compression surface in a direction from the second position toward the first position causes substance to flow from the storage chamber through the second valve and into the compression chamber.

A pump container includes: a container in which a liquid is contained; a shoulder member configured as a cylindrical member, the upper and lower portions of which are open, the shoulder member having a lower outer peripheral portion formed to have an inner diameter larger than that of an upper inner peripheral portion; a valve housing comprising a cylinder portion, a hose being inserted/connected into/to the lower portion of the cylinder portion, the upper portion of the cylinder portion being open, the valve housing comprising an outer-periphery cylinder portion configured on the outer peripheral edge of the cylinder portion in a flared shape, the upper portion of the outer-periphery cylinder portion being open, the valve housing comprising an upper-end insertion portion bent outwards, and the valve housing comprising a seating portion bent outwards from the upper end of the upper-end insertion portion and a discharge cap.

A pumping device (100), comprising a movable part and a fixed part. The movable part is capable of reciprocating relative to the fixed part, thereby dispensing, by means of a straw (30) connected to the fixed part, a product contained in a container (20). The pumping device (100) comprises elastic members (150, 250, 350, 550, 650, 850, 950, 1050), one end of each of the elastic members (150, 250, 350, 550, 650, 850, 950, 1050) is connected or supported on the movable part, and the other end of each of the elastic members (150, 250, 350, 550, 650, 850, 950, 1050) is connected or supported on the container (20), or is supported on the container (20) by means of the fixed part. The pumping device (100) having the described structure allows the elastic members (150, 250, 350, 550, 650, 850, 950, 1050) to be fabricated using plastic, and is also capable of obtaining the required elasticity.

A manually operated pump including: an inlet one-way valve; a pump chamber downstream of and in fluid communication with the inlet one-way valve; a piston interior to the pump chamber and slideably engaged with the pump chamber; an actuator engaged with the piston or the pump chamber; a block thermoplastic elastomeric spring engaged with the actuator to move the actuator as the block thermoplastic elastomeric spring relaxes; and an optional outlet one-way valve downstream of and in fluid communication with the pump chamber.

A pump assembly for a pump dispenser, the pump assembly comprises a cap having a housing and a spout, a collar, a sleeve, and a dip tube. The sleeve is at least partially positioned within the collar and comprises a coupling member. The coupling member comprises a shoulder, a coupling joint, and a coupling member channel extending from the shoulder to the coupling joint. The dip tube has a first end and an opposing second end, and defines a dip tube channel extending from the first end to the second end. The first end of the dip tube is configured to pivotally couple to the coupling joint and fluidly connect the dip tube channel and the coupling member channel. The dip tube channel comprises a first diameter at the first end and second diameter at the second end that is different than the first diameter.

A plastic spring, a pump core, a lotion pump and a press-type packaging container. The plastic spring includes at least one spring unit. Each spring unit includes a first support member, a second support member, and at least two torsion arms. The at least two torsion arms are arranged between the first support member and the second support member, and both ends of each of the torsion arms are respectively connected with the first support member and the second support member. Each of the torsion arms includes at least one vertical section, and an end of each vertical section is connected with the first support member or the second support member.

A hand pump fabricated entirely from plastic components for dispensing liquids, is provided. The hand pump includes an actuator, a closure, a housing having a lower check valve, and a piston having an integrated upper check valve in the form of an inverted cone suspended within a cylinder. An elastic, dome shaped, plastic return spring is utilized to return the actuator to its rest position after actuation. Used pumps do not require disassembly to be recycled.

A method of assembling a trigger sprayer assembly includes providing an engine having a piston chamber and a fluid passage that is fluidly coupled to the piston chamber, the fluid passage extending from an input portion to an output portion. The method further includes inserting a piston component into the piston chamber, and coupling a trigger lever to the engine and the piston component. Pivoting the trigger lever relative to the engine pushes and pulls the piston component within the piston chamber to drive fluid from the input portion to the output portion of the fluid passage. The method further includes coupling a shroud to the engine, where the coupling comprises positioning a rail protrusion of the engine within a corresponding recess formed in the shroud, and inserting a shelf extending from an interior surface of the shroud into a pair of receiving clips extending from the engine.