Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0037—Containers
  • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
  • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
  • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure inside the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1088—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the pump being a double-acting pump

Definitions

• the invention relates to a double-acting pump, namely a pump which is able to deliver a liquid in both stroke directions of its piston.
• It is a differential piston pump, i. that is, it has pistons of different diameters.
• This pump is intended to be used in particular for liquid atomizers, but can also be used to spray liquid in a smooth jet and can have other fields of application.
• the pump is operated in one direction of action by a built-in spring, in its other direction of action by tensioning this spring by a force to be applied from the outside. In particular, it can be operated by the finger of one hand.
• the pump has the features mentioned in the preamble of claim 1. A pump with these features is known from DE-PS 33 41 410.
• the present invention is therefore intended to create a pump which requires only a minimum of components which are relatively simple to build, so that their manufacture is simplified. Above all, the assembly should be simplified.
• the large piston can advantageously be formed in one piece with the piston rod.
• the outlet for the liquid can be provided in the wall of the narrow cylinder at a point which, in all operating states, is located between the two pistons at a point which cannot be reached by them.
• a transverse plate can be provided in one piece with them, and support plates can be used as abutments for the compression spring used for actuation, which run along axial-radial planes and attach to the plate on one side.
• an abutment for one end of the spring in a very simple manner, i. H. be formed using a simple type injection mold.
• the plate can have one or more ventilation openings, as a result of which air can be fed into the liquid container to the extent that liquid is removed in a manner known per se. These vents can also serve to return liquid that has leaked out of the narrow cylinder into a space containing the spring, back into the liquid container and does not come out of the cap.
• the seal By forming the bottom surface of the plate in the form of a blunt cone, the seal can be properly seated.
• the small piston can be of such a length that, even when it is fully pushed in, there is a significant distance between its sealing sleeve and the abutments for the lower end of the spring, so that again the above-mentioned deformations do not occur the tightness of the piston can affect.
• the large piston can have a spacer which, when it stops at the cross-sectional jump point between the two working cylinders, for a significant distance between this cross-sectional jump point le, which can also give rise to deformation, and ensures the effective edge of a sealing sleeve.
• the greater tightness also results in a higher efficiency of the pump.
• Figure 1 is an axial section through a pump according to the invention
• Atomizers shown at bottom dead center, i.e. H. with the spring compressed to the maximum.
• Figure 2 is a top view of only the upper part of the housing itself.
• the housing of the pump is designated as a whole by 1. It has a socket 2 at the bottom for plugging onto a container mouth 6 (shown on the left) or a socket 3 with an internal thread for screwing onto a container mouth 6 (shown on the right).
• Two working cylinders are provided in the housing, namely a narrow cylinder 5 at the top and a further cylinder 7 at the bottom.
• the wide cylinder 7 has approximately twice the cross-sectional area as the narrow cylinder 5.
• An annular stop 9 results between the two.
• the housing has above the stop 9 a plate 13 running transversely to the longitudinal axis of the cylinder, from which the socket 2 or 3 extends downwards.
• An outer cylinder 11 protrudes upwards and forms a sliding guide for the jacket 15 of a cap 16 in its upper part.
• the cap 16 is formed in one piece with the smaller of the two working pistons, piston 17, which itself is in turn formed in one piece with a sealing collar 18 made of flexible plastic material.
• the small piston 17 can be actuated by the cap 16.
• Her jacket 15 slips on the outer cylinder 11 and secures the small piston 17 against tilting.
• a large piston 20 is accommodated, which is formed in one piece with a sealing collar 22. It has a spacer 23 above the upper edge of the sealing sleeve and is inserted with it and with an upward-facing piston rod 25. lumpy. At its upper end it has a stepped section 26 of reduced diameter, to which a plug 28 attaches at the top and widens upwards. The section 26 has an annular stop 30 at the top, matching a corresponding stop of the small piston 17.
• the small piston 17 is hollow and shaped in the region of the plug pin, so that the plug pin is held elastically after insertion, the lower stop of the small piston 17 abuts the stop 30.
• a helical compression spring 32 which is supported on the top 34 of the cap 16 and on the lower left on the upper edge of a cylindrical capsule 36 and on the upper edges of three support plates 38, which press the narrow cylinder 5 with the outer cylinder 11, is used to push the cap 16 up connect and reach down to plate 13.
• the plate 13 is pierced by four ventilation openings 40.
• the lower wall 42 of the plate is a conical surface 44 which forms an angle alpha with a radial plane.
• a disc-shaped seal 42 with a cylindrical neck sits under the plate 13 so that its inner ring portion is pressed down after insertion and thus closes the ventilation openings 40 under elastic tension.
• the cylindrical section of the seal 42 is supported on the upper edge of the container mouth 6 after the fitting of the socket 2, 3.
• Figure 1 shows the lowest position that the sealing collar 18 of the small piston can reach. This point lies at a distance h2 above the upper edge of the capsule 36 and above the upper edges 45 of the support plates 38.
• An outlet channel 46 serves as the liquid outlet, which breaks through the wall of the narrow cylinder 5 and leads into the interior of a nozzle cap 48 which leads inside a sprue 47 is housed.
• the nozzle cap 48 has a device for swirling the liquid, which is known per se, so that a spray jet is formed.
• the upward movement of the two pistons is limited by the two stops 24 and 9 abutting against one another. Then the upper edge of the sealing collar 22 of the large piston is still at a distance h1 from the stop 9.
• the two sealing sleeves 18 and 22 do not come into contact with the area of the two cylinders 5 and 7 in the vicinity of the plate 13, where deformations are to be expected.
• the outlet channel 46 lies in an area that cannot be reached by any of the sealing sleeves.
• an intake valve 52 At the lower end of the wide cylinder 7 there is an intake valve 52 with a ball 53. The upper, widening end of an intake pipe 50 is inserted under tension into the lower end of the cylinder 7.
• the pump consists of just a few individual parts, all of which can be manufactured using simple injection molds.
• the housing 1 itself forms the two cylinders 5 and 7 and the outer cylinder 11, which serves to guide the jacket 15 of the cap 16.
• the cap and small cylinder form a single, easy-to-shape component. The same applies to the large piston, the piston rod and the plug pin 28.
• the compression spring 32 is first placed in the spring chamber 33, then the cap 16 is attached. Then the large calf 20 with its piston rod 25 is inserted from below, the plug pin 28 snapping into the interior of the small piston 17. Then the suction pipe 50 is inserted with the ball 53 from below. Finally, the seal 42 is inserted from below. Finally, the nozzle cap 48 is inserted from the side. The pump is now fully assembled.
• the cap 16 In the rest position, the cap 16 is pressed upward by the compression spring 32, and only so far until the stops 9 and 24 touch.
• the cap can be held in the lower end position shown by additional means, not shown.
• the pump works as follows:
• Liquid which in the event of a leakage of the sealing collar 18 emerges from the narrow cylinder 5 at the top, enters the spring chamber 33, flows there down to the plate 13 and is passed through the ventilation openings 40 during the next downward movement of the cap 16 at the opening seal 42 pressed into the mouth of the liquid container.
• the required replacement air is fed into the container.
• the seal 42 seals the liquid container 4 upwards.

Landscapes

• Reciprocating Pumps (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6379620

Family Applications (1)

Country Status (5)

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Family Cites Families (3)

• 1990
  • 1990-04-18 AU AU54405/90A patent/AU5440590A/en not_active Abandoned
  • 1990-04-18 EP EP90906199A patent/EP0470111A1/de not_active Ceased
  • 1990-04-18 WO PCT/EP1990/000623 patent/WO1990012652A1/de not_active Ceased
  • 1990-04-25 DD DD90340095A patent/DD297485A5/de not_active IP Right Cessation
  • 1990-04-26 CS CS902102A patent/CS210290A2/cs unknown

Non-Patent Citations (1)

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