Patent Application
20120181356
Some shower heads have a faceplate that includes a plastic substrate having a plurality of circumferential openings disposed about a central opening provided therein. The faceplate typically has a plurality of nozzles that protrude through the circumferential openings. Water flows around the nozzles in varying patterns caused by moving the nozzles, usually in unison, into and out of the faceplate. Typically, the nozzles are supported by a spider that is manipulated by a user to move the nozzle bodies into and out of the faceplate.
In some prior art embodiments an o-ring or a thermoplastic rubber layer formed on walls of the face plate circumferential openings provide a seal so that water flows through grooves in the nozzle bodies.
According to an exemplar disclosed herein, a shower head has a nozzle, a shell, a water inlet, and an assembly for holding the nozzle. The assembly has an upper plate made of a first plastic material and has a first opening having a first diameter through which the nozzle extends, a lower plate made of a second plastic material and has a second opening through which the nozzle extends, and an elastomeric middle plate has a third opening having a third diameter that is smaller than the first or second diameter through which the nozzle extends and is in contact therewith. The first material and the second material are ultrasonically welded together to trap the middle plate therebetween and the first opening, the second opening and the third opening are roughly coaxial with each other.
According to a further exemplar disclosed herein, a shower head has a nozzle, and an assembly for holding the nozzle. The assembly has an upper plate made of a first plastic material and has a first opening having a first diameter through which the nozzle extends, a lower plate made of a second plastic material and has a second opening through which the nozzle extends, and an elastomeric middle plate has a third opening having a third diameter that is smaller than the first or second diameter through which the nozzle extends and is in contact therewith. The first material and the second material are ultrasonically welded together to trap the middle plate therebetween and the first opening, the second opening and the third opening are roughly coaxial with each other.
According to a further exemplar disclosed herein an assembly for a shower head has an upper plate made of a first plastic material and has a first opening having a first diameter through which the nozzle extends, a lower plate made of a second plastic material and has a second opening through which the nozzle extends, and an elastomeric middle plate has a third opening having a third diameter that is smaller than the first or second diameter through which the nozzle extends and is in contact therewith. The first material and the second material are ultrasonically welded together to trap the middle plate therebetween and the first opening, the second opening and the third opening are roughly coaxial with each other.
These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
a is a close up view of a portion of the showerhead of
Referring now to
The spider 30 includes a central cylinder 65 disposed closely around the central column 20. The central cylinder 65 is manipulated by handle 70 by a connection (not shown) to slide along the central column 20. The spider 30 has a flange 75 that extends normal to the central cylinder 65, the flange 75 having a plurality openings 80 each opening 80 holding a nozzle 35. As the spider 30 is manipulated upwardly and downwardly, each nozzle 30 is moved within the sealing system 40, as will be discussed infra, to vary spray patterns to a user in the shower (not shown).
Referring now to
Referring now to
The upper and lower disks 115, 120 may be made of polymers that are ultrasonically weldable such as ABS, Acrylic, Polycarbonate or PVC.
Each of the disks 115, 120 and 125 are aligned roughly coaxially as will be discussed herein to ensure that the openings 130, 135, 140 are aligned roughly coaxially for assembly and use. For instance, the middle disk has six grooves 145 extending radially therein that that mate with the six protrusions 150 in the lower disk 120. Similarly, the upper disk 115 has a first bead 155 (see
The upper disk 115 also has a second bead 165 that functions as a weld bead that extends around a central opening 170 and the openings 130 therein. The lower disk 120 has a second groove 175 for receiving that second bead 165 so that during ultrasonic welding, the parts merge together and form a chemical bond and a central opening 176. The upper disk 115 has a circumferential groove 180 therein for receiving a square shaped o-ring 185 to abut and seal about the axial opening 50 if the sealing system 40 is attached to the central column 20. The middle disk has a central opening 177. Central opening 170 has a cavity 178 for receiving the screw 45.
To assemble the part, the middle disk 125 is aligned as stated hereinabove and sandwiched between the upper and lower disks 115 and 120 that are then ultrasonically welded together to trap the middle disk 125 therebetween. The sealing system 40 is then held in the central column by screw 45 in the shell 25. O-ring 190 is trapped by a shoulder 195 on the shell to seal the area 60. The square shaped o-ring 185 provides a seal against the central column 20 and the sealing assembly at the center thereof. The use of rubber in the middle disk 125 helps control dimensions around each nozzle 35 and improves spray performance thereby. The openings 130, 140 and 150 are roughly coaxial with the openings 130 and 150 having a greater diameter than the opening 140. As a result, portions 200 of the middle plate 125 cantilever above opening 135 and below opening 130 and contact the nozzle 35 while the upper disk 115 and the lower disk 120 may not contact the nozzle 35.
Although a combination of features is shown in the illustrated examples, not all of them need to be combined to realize the benefits of various embodiments of this disclosure. In other words, a system designed according to an embodiment of this disclosure will not necessarily include all of the features shown in any one of the Figures or all of the portions schematically shown in the Figures. Moreover, selected features of one example embodiment may be combined with selected features of other example embodiments.
The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this disclosure. The scope of legal protection given to this disclosure can only be determined by studying the following claims.
