A dispenser has a body with a variable-volume storage chamber for storing substance, and a dispensing portion defining a dosage chamber in fluid communication with the storage chamber. A first valve includes a valve seat and a flexible valve cover seated thereon defining a normally-closed fluid-tight seam therebetween. The valve cover relative to moves from the valve seat to allow substance through the seam and out of the dispenser. A second valve allows substance from the storage chamber into the dosage chamber and substantially prevents flow from the dosage chamber into the storage chamber. An actuator is manually movable between (i) a first non-actuated position, and (ii) a second actuated position extending into the dosage chamber for compressing a dose of substance therein, dispensing substance through the first valve. The elasticity of the actuator causes it to return to the first non-actuated position upon manually releasing the actuator.

A limiter for a dispensing device is provided. The limiter includes a body (20) arranged to mount with at least a portion of a dispensing device (300), and a stop extending from the body. The stop (40) is configured to permit movement a plunger of the dispensing device a predetermined distance in a dispensing direction correlated to a desired volume of medium to be delivered from the dispensing device. The stop is configured to prevent further movement of the plunger in the dispensing direction, thereby limiting the amount of medium delivered from the dispensing device. The dispensing device may be a syringe.

Provided is a dispenser for pasty products having a fixed head that has a dispensing duct for dispensing a product, a pump with an elastically deformable cap, a manually-operated actuator, a separating wall with a suction inlet, and a suction valve cooperating with the suction inlet. The suction valve has a valve body and a plurality of tabs that bend and open the suction inlet in a product suction step, and close the suction inlet in a product dispensing step.

A refillable mastic cartridge for a mastic medium to be dispensed includes a rigid head part having a dispensing outlet, and a mastic cartridge chamber configured to store a component of the mastic medium to be dispensed from the mastic cartridge via the dispensing outlet.

Provided are methods and systems for delivering a treatment fluid to a wellsite. An example method includes receiving a container containing a treatment fluid component from a treatment fluid component supplier. The method further includes introducing the treatment fluid component into a wellbore from the container by pumping the treatment fluid component out of the container and into the wellbore. The treatment fluid component is not transferred to another container during the receiving or the introducing.

A dispenser includes a body (10) the body including an asymmetric shape corresponding to a flattened product pouch. The body includes a row of teeth (42) extending longitudinally along the bottom of the body. A grip (28) is slidingly engaged with a bottom of the body and is coupled to a squeeze pusher (32) disposed within the interior space of the body. An actuator arm (30) is movably attached to the grip. A drive mechanism is movably attached to the actuator and is engageable with the row of teeth. For dispensing, movement of the actuator causes a corresponding movement of the drive mechanism which causes the grip and squeeze pusher to move relative to the body in a direction from the proximal end to the dispensing end, thus applying pressure to the pouch.

A syringe, in particular for viscous or liquid dental materials, provided with a syringe housing 12, in which a plunger 22 is guided for displacement in a manner known, wherein the plunger 22 can be removed from the syringe housing 12 and introduced into the syringe housing 12, and with an outlet cannula 20, which is fitted on the syringe housing 12. A region of the syringe housing 12 which is adjacent to the outlet cannula 20 is of deformable design and a region of the syringe housing 12 which is remote from the outlet cannula 20 is of dimensionally stable design.

An applicator assembly for gel-based product and method of use that includes a housing enclosing a pump with a handle extending from the housing. The handle holds a flush mounted trigger assembly that operates the pump. Product is drawn from an external cartridge by vacuum. A movable plug maintains product structural integrity as product is withdrawn from the cartridge.

A dispensing package includes a longitudinal axis; a shell that includes a chamber disposed in the shell, a first end, a plurality of shell protrusions extending downwardly from the first end, and a second end opposite the first end; a screw assembly including a protrusion extending from the screw assembly, the protrusion of the screw assembly constructed to engage at least one of the plurality of shell protrusions, a screw base disposed adjacent to the first end and rotatably associated with the shell, and a spindle extending from coaxially to the longitudinal axis from the screw base through the bottom wall into the chamber, wherein the spindle includes threads disposed about an outer surface of the spindle; and an elevator platform threadably engaged to the threads of the spindle.

A device for dispensing a fluid product, comprising a rigid cylindrical body having a vertical main axis, a rigid piston which is oriented essentially horizontally and which can slide vertically inside the body, and an upper extraction wall which closes the upper end of the body. According to the invention, the body, the piston and the upper wall define a space that is intended to be filled with the product to be dispensed. In addition, the upper wall comprises a slotted cover that can open in order to connect the space to the exterior. The upper wall is elastically deformable and can deform into the space when a pressure is exerted manually on the upper wall, so as to increase the pressure inside the space and cause the slotted cover to open.