Abstract: [Object] To provide a pump dispenser which allows accurate determination of a direction of spraying of liquid without a nozzle part moving toward a higher or lower position and, furthermore, whose trigger is excellent in operability.

Abstract: A pump dispenser includes a housing, a piston structure, a spring, a trigger and a valve. The housing has a front cylinder part and a rear inverted-L-shaped grip part that are integrally formed, a nozzle base that is attached to the housing and that has a front nozzle part mounted thereon. The piston structure is configured of a hollow-shaped piston and a hollow-shaped piston shaft and that slides inside the cylinder part. The spring presses the piston structure upward. The trigger is positioned above the housing, has a front tip rotatably mounted on the housing, and has a mid part where a tip of the hollow-shaped piston shaft abuts. The valve rod is disposed at a center part of the cylinder part.

Abstract: [Object] To provide a pump dispenser which allows accurate determination of a direction of spraying of liquid without a nozzle part moving toward a higher or lower position and, furthermore, whose trigger is excellent in operability.

Abstract: A bayonet connection structure between a container mouth portion and a cap is disclosed. The cap includes multiple slip prevention claws spaced apart from each other. One of the slip prevention claws is elastically displaceable in a radial direction. A rotation prevention projection is provided between the elastically-displaceable slip prevention claw and the other slip prevention claws. The mouth portion has a hollow cylindrical portion with an outer circumferential surface provided with multiple slip prevention claw (SPC) engagement portions for the slip prevention claws. The SPC engagement portions are as many as the slip prevention claws. Each of the SPC engagement portions has an end in a clockwise direction provided with a rotation prevention stopper. The mouth portion includes a rotation prevention rib to be got over by the rotation prevention projection of the cap when the cap is rotated.

Abstract: A trigger-type pump dispenser includes a housing 11 with a front cylinder part 11A and a rear inverted-L-shaped grip part 11B integrally formed, a nozzle base 12 attached to the housing 11 and having a front nozzle part 11C mounted thereon, a piston structure configured of a hollow-shaped piston 15 and a hollow-shaped piston shaft 16 and sliding inside the cylinder part, a spring 17 which presses the piston structure 14 upward, a trigger 13 positioned above the housing 11, having a front tip rotatably mounted on the housing 11, and having a mid part where a tip of the hollow-shaped piston shaft 16 abuts, and a valve rod 18 disposed at a center part of the cylinder part 11A.

Abstract: A bayonet connection structure between a container mouth portion and a cap is provided in which a crush and abrasion of a rotation prevention portion on a container mouth portion side is prevented. A cap 11 includes a plurality of slip prevention claws 12 and 13 spaced apart from each other in a circumferential direction on an inner circumferential surface, one of the plurality of slip prevention claws 12 and 13 is the slip prevention claw 12 elastically displaceable in a radial direction, and a rotation prevention projection 14 extending in an axial direction is provided between the elastically-displaceable slip prevention claw 12 and each of the other slip prevention claws 13.

Abstract: A trigger pump sprayer in combination with a liquid dispensed from the sprayer. The sprayer is suitable for dispensing liquid from a reservoir, through a nozzle into particles. The trigger sprayer provides for efficacious particle size distributions of the liquids, when sprayed under non-ideal conditions. Non-ideal conditions include only partial strokes of the trigger, rather than full strokes and relatively slow trigger strokes. The trigger sprayer advantageously delivers a particle size distribution suitable for liquids having particular rheological properties. The advantageous particle size distribution difference is accomplished by using a precompression piston which reciprocates in response to trigger strokes, and selecting a liquid having appropriate properties to correspond to the trigger pump operating characteristics.

Abstract: A trigger pump sprayer in combination with a liquid dispensed from the sprayer. The trigger sprayer provides for efficacious particle size distributions of the liquids, when sprayed under non-ideal conditions. Non-ideal conditions include only partial strokes of the trigger, rather than full strokes and relatively slow trigger strokes. A bimodal distribution of particle sizes is obtained under two different operating conditions. The sprayer/liquid combination according to the present invention compresses the difference between the two modes, without requiring undue work by the operator. The advantageous particle size distribution difference is accomplished by using a precompression piston which reciprocates in response to trigger strokes, and selecting a liquid having appropriate properties to correspond to the trigger pump operating characteristics.

Abstract: A trigger pump sprayer in combination with a liquid dispensed from the sprayer. The sprayer is suitable for dispensing liquid from a reservoir, through a nozzle into particles. The trigger sprayer provides for efficacious particle size distributions of the liquids, when sprayed under non-ideal conditions. Non-ideal conditions include only partial strokes of the trigger, rather than full strokes and relatively slow trigger strokes. The trigger sprayer advantageously delivers a particle size distribution suitable for liquids having particular rheological properties. The advantageous particle size distribution difference is accomplished by using a precompression piston which reciprocates in response to trigger strokes, and selecting a liquid having appropriate properties to correspond to the trigger pump operating characteristics.

Abstract: A trigger pump sprayer in combination with a liquid dispensed from the sprayer. The trigger sprayer provides for efficacious particle size distributions of the liquids, when sprayed under non-ideal conditions. Non-ideal conditions include only partial strokes of the trigger, rather than full strokes and relatively slow trigger strokes. A bimodal distribution of particle sizes is obtained under two different operating conditions. The sprayer/liquid combination according to the present invention compresses the difference between the two modes, without requiring undue work by the operator. The advantageous particle size distribution difference is accomplished by using a precompression piston which reciprocates in response to trigger strokes, and selecting a liquid having appropriate properties to correspond to the trigger pump operating characteristics.

Abstract: [Problem] To provide by the present invention a pressure-accumulation dispenser that can be given a pressure-accumulation function with a simple structure. [Means for Solving Problems] A pressure-accumulation dispenser pressurizes and injects liquid in a cylinder 11 from a nozzle portion 21 to the outside by sliding a piston portion 23 in the cylinder 11 up and down with rotation of a trigger includes a pressure-accumulation giving valve in the piston portion 23. The pressure-accumulation giving valve is formed of a piston valve 51, a spring body 52, and a piston cover 53, or the pressure-accumulation giving valve is formed of an insertion valve seat 54, a piston valve 51, a spring body 52, and a piston cover 53.

Abstract: [Objective] To provide a trigger-type pump dispenser having a cam mechanism which stabilizes the movement of a swing lever and prevents a biasing means for returning a piston from being affected by liquid. [Means for Solution] A trigger-type pump dispenser A has: a body part (1) attachable to an opening part of a container main body; a cylinder part (2) integrally provided with the body part (1); a piston part (3) slidable in the cylinder part (2); a balance arm part (4) pivotally attached to the body part 1 so as to vertically slide the piston part (3); a trigger part (6) turning the balance arm part (4); a spring part (5) for returning the trigger part (6) via the balance arm part (4); and a cover member (8) attached to the body part (1); wherein movement of the trigger part (6) is transmitted to the balance arm part (4) by a cam mechanism.