Patent CZ-295306-B6 (CZ)
Title: Trigger pump dispenser
Inventor: THANISCH KLAUS
IPC: B05B11/00
Filed: 1995-11-06
Abstract: In the present invention, there is disclosed a dispenser with a pump and a trigger, comprising a pump chamber  (38) and a unitary valve member (15) associated therewith, with an inlet portion and an outlet portion (112) arranged in each another, with holes (120) passing through the valve (15) therebetween, whereby the inlet portion forms along with a seat (130) a one-way valve for inflow of a liquid into the pump chamber (38). The outlet portion (112) forms along with a seat (136) a one-way valve for discharge of the liquid from the pump chamber (38). The holes (120) form a part of both inlet and outlet portions. The valve (15) further comprises a formation (114) serving for fixedly mounting thereof in the dispenser body (13), whereby said formation (114) is disposed at the junction of the base outlet portion (112) on its outer side and the inlet portion with holes (120) on its inner side wherein said outlet portion (112) and said inlet portion move independently relative to the formation (114). An all plastic manually operable trigger pump dispenser for use and incorporation on a container for liquid to be dispensed, comprising in combination: a component retaining body (13) comprising a cylinder (40), a piston (16) in the cylinder (40) defining therewith a variable volume pump chamber (38) adapted to assume a retracted position at which the chamber assumes a first position of large volume and an inserted position at which the chamber assumes a second position of lesser volume, a trigger (17) carried by said body (13) and coupled with the piston (16) and adapted to be digitally moved from a starting position at which the piston (16) is in the retracted position and a depressed position at which the piston (16) is in the inserted position and moved back to the starting position, a spring means (18) coupled with surfaces of the body (13) and trigger (17) for biasing the trigger (17) towards its retracted position, an inlet port (36) and outlet port (86) defined by surfaces of the body (13) and adapted to be in communication with the pump chamber (38), a valve (15) inlet portion adapted to close the inlet port (36) when liquid to be dispensed is in the pump chamber (38) and when the piston (16) is moved from the retracted position to the inserted position as the ump chamber (38) decreases in volume, the valve inlet portion being adapted to open the inlet port (36) when the liquid to be dispensed is drawn into the pump chamber (38) through the inlet port (36) as the pump chamber (38) volume increases when the piston (16) is moved from the inserted position to the retracted position, the valve (15) outlet portion (112) adapted to open the outlet port (86) when the pump chamber (38) decreases in volume as the liquid therein is dispensed through the outlet port (86) and adapted to close when the pump chamber (38) increases in volume wherein the inlet section and the outlet portion (112) of the valve (15) being a unitary valve member (15) having means for connecting the valve member (15) to the body (13), Passage means (88, 90) defined by surfaces of the body (13) for cooperating in directing the liquid to be dispensed out from the outlet port (86) and eventually into a selected discharge pattern, a nozzle (19) on the body (13) for directing the liquid to be dispensed from the passage means (88, 90) into the selected discharge pattern, means for coupling the body (13) to the container provided with a neck, and vent means (2) for communicating the container neck with the ambient. The valve member (15) is generally cup-shaped, having a base (110) formed with a dome (116), a tubular skirt extending peripherally from the base (110) in the same direction as the dome (116), holes (120) formed on the base (110) around the dome (116), the dome (116) providing the valve member (15) inlet portion for the inlet port (36) and the skirt providing the valve member (15) outlet portion  (112) for the outlet port (86), and the holes (120) are adapted to communicate sequentially with the inlet and outlet ports (36, 86).