# US 4,394,965 A · Pulsating shower using a swirl chamber

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- Number: US 4,394,965 A
- Document ID: US4394965A
- Status: Granted
- Kind: A
- Application number: 06/264,563
- Filed: 1981-05-18
- Granted: 1983-07-26
- Earliest claimed: 1980-05-17
- Assignees: Friedrich Grohe Armaturenfabrik GmbH & Co.
- Inventors: Wolfgang Backe; Wolf-Dieter Goedecke; Reinhard Schwenzer
- Web page: https://patentgrep.com/patent/US4394965A

## CPC

- B05B 1/3426: {the channels emerging in the swirl chamber perpendicularly to the outlet axis (B05B1/3436 takes precedence)}
- B05B 1/08: of pulsating nature, e.g. delivering liquid in successive separate quantities
- B05B 1/189: {actuated by a rotating movement}
- B05B 1/1896: {located in or on the housing}
- F15C 1/22: Oscillators
- B05B 1/18: Roses; Shower heads
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- F15C: FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers F15B5/00, {F15B21/00}; fluid dynamics in general F15D; computer comprising fluid elements G06D, G06G; {electric control by means of electro-hydraulic or electro-pneumatic amplifiers G05B7/02})

## Abstract

A shower head which provides a pulsating output utilizes a swirl chamber to impart a swirl to the water flow. The use of water driven parts is thereby eliminated.

## Claims

### Claim 1

A shower fixture connected to a fluid supply, said shower fixture comprising:
a swirl chamber,
said swirl chamber being of approximately cylindrical shape and having a central longitudinal axis,
said chamber having an upstream end face, said upstream end face having an inlet opening, said inlet opening being positioned on said central longitudinal axis and in fluid communication with said fluid supply to provide a supply jet, said swirl chamber having a downstream end face having a plurality of outlet apertures arranged along a pitch circle, said pitch circle being concentric with said central longitudinal axis,
and means for generating a control flow, said control flow means comprising one or more tangentially located inlet apertures in the wall of said swirl chamber, said inlet apertures being located near said upstream end face.

### Claim 2 (depends on 1)

A shower fixture in accordance with claim 1, wherein said control flow means includes a fluid passage between said one or more tangentially located inlet openings and said fluid supply upstream of said swirl chamber; and
a control valve in said fluid passage.

### Claim 3 (depends on 2)

A shower fixture in accordance with claim 2, wherein said shower fixture comprises a housing, and said swirl chamber is formed by a hollow cylinder.

### Claim 4 (depends on 1, 2)

A shower fixture in accordance with claims 1 or 2 wherein said control flow means comprises an annular passage around said swirl chamber in communication with said one or more tangentially located inlet openings, and said control valve comprises a tap valve positioned radially to said swirl chamber and in communication with said annular passage.

### Claim 5 (depends on 3)

A shower fixture in accordance with claim 3, wherein said housing includes a bottom portion, said hollow cylinder being mounted axially in said bottom portion and capable of rotary movement; said fluid passage comprises one or more slots in said housing adjacent to said hollow cylinder, each of said slots providing fluid communication to a corresponding one of said one or more tangentially located inlet openings, whereby the rotational position rotation of said hollow cylinder determines the through flow cross-section each one of said inlet openings presents to the corresponding one of said slots.