SHOWER HEAD OPERATING MECHANISM

Abstract: The operating mechanism (2) is shown consisting of a rotary actuating member or turbine wheel (20) driven by water flow through the shower head (1), the wheel (20) having a cam co-action (26, 61) with a plate (6) fixed in the shower head. The resulting axial oscillation of the wheel (20) is imparted to a closure or restricting stopper or plug (3) relative to an outlet opening (40) in an outlet plate (4) of the head (1), the plug (3) being carried by a shaft (23) from the wheel (20). Variable or pulsating water emission is thus effected from the opening (40). A rear perforated feed plate (5) directs water flow to the wheel (20) which is shown resiliently loaded to maintain the cam co-action by a compression spring (7) acting between the plate (5) and wheel (20) as in Figures 1 and 2. Positive two way cam operation of the wheel (20) is shown in Figure 3 by and between the feed plate (5) and plate (6). The plug (3) is screw adjustable (32) on the shaft (23) for variation of water emission and has a taper cooperation with the outlet opening (40).

Description: SHOWER HEAD OPERATING MECHANISM This invention has reference to shower heads usually in the form of handsets and has for its object to provide operating mechanism in or for a shower head whereby a unique shower effect is provided and which may also be adjustable. According to this invention operating mechanism in or for a shower head having a front outlet part or plate and wherein the mechanism includes a rotary member arranged for rotation within the head by water flow through the latter and also arranged for axial oscillation in said head in controlling water emission from the front outlet part or plate; characterised by the rotary member as a rotary actuating member being arranged to have a cam or like cooperation with at least one fixed part or plate fixed in use within the head for axially oscillating closure or restricting means extending therefrom in relation to a forward outlet opening in the front outlet part or plate for variable or pulsed water emission therefrom. The actuating means may be in the form of a rotary member or turbine wheel which is rotated by water flow through the show head and which has a cam or like co-operation within the shower head for imparting axial oscillation to the closure or restricting means relative to the outlet opening. The closure or restricting means may consist of a stopper or plug member e.g. of taper form co-operating with the outlet opening of the shower head for effecting the variable or pulsed water emission from the shower head. The closure or restricting means or plug member may be axially adjustable relative to the actuating means for obtaining variation in the form of the water emission from the shower head. A practical example of a shower handset containing operating mechanism according to the invention is shown in the accompanying drawings in which:- Figures 1 and 2 are axial plane cross sectional views of the shower hand set respectively showing an open position and a closed or restricting position of the operating mechanism, and Figure 3 is an axial plane cross section showing an alternative form of the operating mechanism. The head portion 10 of the handset 1 having a tubular handle 11 contains the operating mechanism 2 which is shown basically comprising a turbine wheel 20 having blades 21 and connected by a shaft 23 to a closure or restricting plug 3 received in an outlet opening 40 in the head spray plate 4. As usual the various parts of the handset 1 including the operating mechanism 2 are made of suitable plastic material (apart from any spring loading). For assembly purposes the spray plate 4 is screw threaded by its side wall 41 into the head 10, a sealing O-ring being provided at 42. The turbine wheel 20 is concentrically located in the head 10 (and, as shown, within the spray plate 4) between an upper water feed plate 5 and a lower cam plate 6 through which the shaft 23 passes. An upper shaft 25 of the turbine wheel 20 is rotatably received in the feed plate 5 for suitable rotary support of the wheel 20. Openings 50 in the feed plate 5 direct water flow within the head 1 against the upstanding blades 21 of the turbine wheel 20 to impart rotation to the latter, the blades 21 being preferably inclined from the radial direction or otherwise suitably arranged for obtaining an effective turbine action. The underside of the turbine wheel 20 has a cam co-operation with the cam plate 6 and for this purpose is shown provided with a depending eccentric follower 26 which co-operates with a central cam formation 61 or boss on the cam plate 6 so that as the wheel 20 rotates it is subject to axial oscillation or reciprocation. Such oscillation is imparted to the shaft 23 and plug 3 for its opening and closing or restricting movement relative to the outlet opening 40. Continuous contact of the follower 26 with the cam formation 61 is maintained by spring loading shown provided by a compression spring 7 acting between the feed plate 5 and the turbine wheel 20. The upper shaft 25 is of sufficient axial extent for oscillation in the feed plate 5 and so maintains upper support of the wheel 20. A light spring 7 sufficient for the purpose should be employed so as to minimise frictional restriction of rotation of the wheel 20. An anti-friction washer may be interposed between the spring 7 and wheel 20. In an alternative arrangement a compression spring may act on the underside of the wheel 20 from the plate 6 with an upstanding follower from the wheel 20 cooperating with central cam formation on the underside of the upper feed plate 5. However, this would entail a stronger spring to lift the wheel 20 and plug 3 against the water flow and which may result in increased friction between the spring and the wheel 20. The use of a spring can b dispensed with by providing a positive two way cam action. Thus as shown in Figure 3 an upstanding eccentric follower 27 is also provided on the wheel 20 for cooperation with central cam formation 51 on the underside of the feed plate 5, i.e. in addition to the depending follower 26 and cam formation 61. As a result the wheel 20 and plug 3 are positively oscillated in both directions. Other means of positive oscillation may be provided such as by radial pins extending from the wheel 20 and engaging cam slot formation in the side wall 41 of the spray plate 4 (or in the head 10) or vice versa. The blades 21, shafts 23, 25 and the follower 26 or followers 26 and 27 are shown integral with the turbine wheel 20 e.g. as a plastic moulding. Water flow through the head 10 would have a lubricating action in effecting easy operation of the working parts of the mechanism 2. The cam plate 6 is also provided with openings 60 for passage of water from about the turbine wheel 20 to the outlet opening 40 in the spray plate 4. The outlet opening 40 and plug 3 are shown of corresponding outward taper form for suitable water emission. In operation the rotating and oscillating turbine wheel 20 causes the plug 3 to be moved outwardly and inwardly relative to the outlet opening 40 so that a unique pulsating emission of water is obtained which may be of a fairly concentrated jet form. However, variation in the form of the water emission can be effected by axially adjusting the plug 3 on the shaft 23 by its screw mounting 32 on the latter. Thus by unscrewing the plug 3 outwardly a more divergent spray form of water emission can be provided. The rotation of the plug 3 relative to the outlet opening 40 may impart a swirling action to the water emission. The plug 3 and outlet opening 40 may be of different shape, or corresponding shape, according to the nature of water emission requirements. Thus, for example, the plug 3 and outlet opening 40 may be of corresponding mushroom or part spherical shape. More than one operating mechanism 2 with a corresponding outlet at 40 may be provided in one shower head e.g. by means of a suitable miniaturised form of each mechanism within the head. Each mechanism may operate in relation to a different type of outlet, and selector valve control of water flow to the mechanisms may be provided for their selective operation. It is to be understood that various other constructional and functional modifications may be made to the operating mechanism within the scope of the invention herein defined i.e. as incorporated in a shower head or supplied for use therein. The shower head may also include other selectable shower modes in any known or suitable manner.

Claims: CLAIMS 1. Operating mechanism in or for a shower head (1) having a front outlet part or plate (4) wherein said mechanism (2) includes a rotary member (20) arranged for rotation within the head (1) by water flow through the latter and also arranged for axial oscillation in said head (1) in controlling water emission from the front outlet part or plate (4); characterised by the rotary member (20) as a rotary actuating member being arranged to have a cam or like cooperation (26, 61) with at least one fixed part or plate (6) fixed in use within the head (1) for axially oscillating closure or restricting means (3) extending therefrom in relation to a forward outlet opening (40) in the front outlet part or plate (4) for variable or pulsed water emission therefrom. 2. Operating mechanism according to claim 1 wherein the rotary actuating member (20) is in the form of a bladed (21) turbine wheel (20) for rotation by water flow through the shower head (1). 3. Operating mechanism according to claim 1 or 2 wherein the rotary actuating member or turbine wheel (20) receives water flow directed to it through an apertured (50) feed plate (5) fixed in use within the shower head (1). 4. Operating mechanism according to any of the preceding claims wherein the closure or restricting means (3) such as a stopper or plug is situated at the front exterior of the outlet part or plate (4) for cooperation with the outlet opening (40) in the latter. 5. Operating mechanism according to any of the preceding claims wherein the closure or restricting means (3) such as a stopper or plug is of taper form for cooperation with a corresponding taper form seating of the outlet opening (40). 6. Operating mechanism according to any of the preceding claims wherein the closure or restricting means (3) such as a stopper or plug is axially adjustable (32) relative to the rotary actuating member or turbine wheel (20) for obtaining variation in the form of the variable or pulsed emission of water from the outlet opening (40). 7. Operating mechanism according to any of the preceding claims wherein the rotary actuating member or turbine wheel (20) has a shaft or like connection (23) with the closure or restricting means (3) such as a stopper or plug. 8. Operating mechanism according to claims 6 and 7 wherein the closure or restricting means (3) such a stopper or plug is axially adjustable (32) on the shaft or like connection (23). 9. Operating mechanism according to any of the preceding claims wherein the rotary actuating member or turbine wheel (20) is resiliently or spring urged (7) for maintaining its cam or like cooperation (26, 61) with a fixed part or plate (6) within the shower head (1). 10. Operating mechanism according to any of claims 1 to 8 wherein the rotary actuating member or turbine wheel (20) has a cam cooperation (27, 51 and 26, 61) with and between two opposed fixed parts or plates (5,6) within the shower head (1). 11. Operating mechanism according to claim 10 wherein the rotary actuating member or turbine wheel (20) has a cam cooperation (27, 51) with a rear apertured feed plate (5) according to claim 3 and at (26, 61) with a cam co-action plate (6) forward of said rotary actuating member or turbine wheel (20). 12. A shower head having two or more operating mechanisms (2) therein according to any of the preceding claims.

Inventors: BISHOP ROBERT, SAMWELL CHRISTOPHER, BISHOP, ROBERT, SAMWELL, CHRISTOPHER
Applicants: BISHOP ROBERT, NEWTEAM LTD, SAMWELL CHRISTOPHER, BISHOP, ROBERT, NEWTEAM LIMITED, SAMWELL, CHRISTOPHER
Application year: 1999
Main classification: B05B1
IPC codes: B05B1, B05B3