Finger spray pump and nozzle head for spray pump

Patent metadata

Field	Value
Publication number	US-10512926-B2
Application number	US-201716322595-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Aug 4, 2016
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A finger spray pump for spraying a medium has a finger-actuated pump head movable between a spraying position and an initial position. The pump has an outlet nozzle and a pump chamber with an inlet valve and an outlet valve, a piston rod, a pump piston, a first spring acting between the piston rod and the pump piston, and a second spring acting between the piston rod and the pump housing. The pump piston is movable between a sealed position and an open position, to form the outlet valve, wherein the pump piston in the sealed position lies on a sealing extension of the piston rod and in the open position allows the passage of medium between the sealing extension and the pump piston. The pump piston is supported on two zones of an outer surface of the piston rod that are axially spaced apart.

First claim

The invention claimed is:

1. A finger spray pump for spraying a medium, comprising a finger-actuated pump head moveable relative to a pump housing between a spraying position and in initial position, wherein the pump housing has a guide portion, further comprising a spray nozzle and a pump chamber, wherein the pump chamber has an inlet valve and an outlet valve, a piston rod, a pump piston, a first spring acting between the piston rod and the pump piston, and a second spring acting between the piston rod and the pump housing, wherein the pump piston is further movable relative to the piston rod to a limited extent between a sealed position and an open position, to form the outlet valve, wherein the pump piston in the sealed position lies on a sealing extension of the piston rod and in the open position allows a medium to pass between the sealing extension and the pump piston, wherein further the pump piston is supported in the sealed position as well as in the open position on two support areas of an outer surface of the piston rod, which are axially spaced apart, wherein the piston rod consists of a central piston rod portion and an outer piston rod cylinder portion and wherein, on its piston-side end, the piston rod cylinder portion has a taper, which further on an end side transitions again into a support shoulder, which further extends radially in relation to the taper, wherein the taper is assigned to a radially inner support shoulder of the pump piston, which, in the spray position, comes to lie on an edge of the taper on a spray head-side.

2. The finger spray pump according to claim 1 , wherein the support areas are separated at least in the sealed position in the vertical direction by means of a horizontally circumferential free space.

3. The finger spray pump according to claim 1 , wherein the first spring and the second spring are supported on the piston rod on a radially projecting shoulder, and the shoulder of the piston rod cooperates with a cylindrical inner surface of the pump housing-side guide portion to guide the piston rod, wherein the springs are furthermore radially exposed in their support areas on the piston rod with regard to the guide portion.

4. The finger spray pump according to claim 3 , wherein a radially outer front face of the shoulder of the piston rod lies on the inner surface of the guide portion in the initial position and in the spray position.

5. The finger spray pump according to claim 1 , wherein the sealing extension is embodied on the central piston rod portion.

6. The finger spray pump according to claim 1 , wherein the central piston rod portion is catch-mounted in the piston rod cylinder portion.

7. The finger spray pump according to claim 6 , wherein a medium path is disposed between an outer surface of the central piston rod portion and an inner surface of the piston rod cylinder portion.

8. A nozzle head for a spray pump, comprising a pump head, a receiving pin in the pump head, and a cap having a spray nozzle being catch-mounted in the pump head in association with the receiving pin, wherein the receiving pin has a longitudinal axis extending in the mounting direction of the cap, and a liquid path in the direction of the longitudinal axis is embodied in the receiving pin, which liquid path leads to a central chamber positioned upstream of the spray nozzle, wherein the central chamber further has inlet channels, which extend in a plane running perpendicular to the longitudinal axis and which are partly formed by an inner surface of the cap and partly by an outer surface of the receiving pin, wherein further boundary surfaces of the inlet channels, with the exception of a bottom surface, are only embodied in the cap and wherein the receiving pin has a closed planar front face, which is simultaneously used to form the boundary surfaces of the inlet channels, wherein the front face is surrounded by a circumferential surface, which runs in a stepped manner with regard to said front face and which extends at least across the circumferential angle, in which the inlet channels are spaced apart, wherein the inlet channels radially outwards lead into an annular channel, which is created as a result of the circumferential surface, wherein side walls of all of the inlet channels are formed by a continuous rib formed in the cap and wherein the running through rib in circumferential direction and seen with reference to a longitudinal axis builds the inner side wall as well as the outer side wall of each inlet channel and moreover a radial outer connection wall between the outer side wall and the inner side wall of each inlet channel.

9. The nozzle head according to claim 8 , wherein, concerning the central chamber, the inlet channels have flow central axes, which run tangentially to a circle, a center of which is formed through the longitudinal axis.

10. The nozzle head according to claim 9 , wherein a radius of the circle is smaller than a greatest dimension of the central chamber at right angles to the longitudinal axis.

Assignees

• Rpc Bramlage Gmbh

Inventors

• Goettke Sabine

Classifications

• B05B11/1025 Primary

  a spring urging the outlet valve in its closed position (B05B11/1026 takes precedence) · CPC title

• B05B11/1047

  the pump being preassembled as an independent unit before being mounted on the container · CPC title

• B05B11/1074

  located outside pump chambers · CPC title

• B05B1/3436 Primary

  the interface being a plane perpendicular to the outlet axis · CPC title

• B05B11/3047

  Operations & Transport · mapped topic