Spray head for a sink faucet or the like

• US 5,145,114 A
• Filed: 11/26/1990
• Issued: 09/08/1992
• Est. Priority Date: 01/28/1989
• Status: Expired due to Term

• Current Assignee: Ideal-Standard GmbH
• Original Assignee: Ideal-Standard GmbH
• Inventors: Monch, Heinrich
• Primary Examiner(s): Kashnikow, Andres
• Assistant Examiner(s): WELDON, KEVIN P
• Application Number:
  US07/585,116
• Time in Patent Office: 652 Days
• Field of Search: 251/325, 137/625.49, 239/447, 239/449, 239/445, 239/443, 239/446, 239/448, 239/124, 239/126
• US Class Current: 239/126
• CPC Class Codes: B05B 1/1618 where said valve is a double-seat lift valve
• CPC Class Codes: B05B 1/18 Roses; Shower heads with means for adding soap or the like E03C1/046; jet regulators E03C1/08
• CPC Class Codes: B05B 15/62 Arrangements for supporting spraying apparatus, e.g. suction cups

Abstract

A spray head (1) for a sink faucet (2) or the like that is suited for connection to a low-pressure storage tank (open hot water storage tank), with a water feed (4), a normal jet discharge (7) placed centrally in particular, a spray discharge (9) placed in particular surrounding normal jet discharge (7) concentrically and with a multiplicity of small spray holes (10), and a reversing valve (13) in which, in the normal position, reversing valve (13) connects normal jet discharge (7) to water feed (4) and separates spray discharge (9) from water feed (4) and, in a spray position, connects spray discharge (9) to water feed (4) and separates normal jet discharge (7) from water feed (4), is completely suited for use in connection with a low-pressure storage tank by a bypass pipe (21) that acts in the spray position being provided in reversing valve (13) between water feed (4) and normal jet discharge (7) and the flow resistance of bypass pipe (21) being greater than the flow resistance of spray discharge (9) when spray holes (10) are not added, but the operationally maximum dynamic pressure occurring upstream from bypass pipe (21) when spray holes (10) are added being smaller than the bursting pressure of an allocated low-pressure storage tank.

Claims

1. Spray head (1) for a sink faucet (2) for connection to a low-pressure storage tank, said spray head comprising a water feed (4), a normal jet discharge (7), a spray discharge (9) concentrically surrounding the normal jet discharge (7) and having a multiplicity of small spray holes (10), and a reversing valve (13) wherein, in a normal position, the reversing valve (13) connects the normal jet discharge (7) to the water feed (4) and separates the spray discharge (9) from the water feed (4) and, in a spray position, connects the spray discharge (9) to the water feed (4) and blocks water flow to normal jet discharge (7) from the water feed (4), wherein a bypass pipe (21) that is active in the spray position is provided in the reversing valve for providing a flow path between the water feed (4) and the normal jet discharge (7), and wherein the flow resistance of bypass pipe (21) is greater than the flow resistance of the spray discharge (9) when the spray holes (10) are not clogged for achieving a preferential flow to a spray discharge but which is low enough to permit a flow through the bypass during operation of the spray head when the spray holes are clogged to limit a maximum dynamic pressure occurring upstream from the bypass pipe (21) to a value which is smaller than the bursting pressure of an associated low-pressure storage tank.

2. Spray head (1) according to claim 1, wherein the bypass pipe (21) is placed in a valve body (16) of the reversing valve (13).

3. Spray head (1) according to claim 2, wherein the valve body (16) is a seat valve body that can be moved in the axial direction and wherein the bypass pipe (21) is made as a central, axial channel in the valve body (16).

4. Spray head (1) according to claim 3, wherein the valve body (16) is placed on a piston rod (19) having the central, axial channel, and wherein said piston rod (19) is open on its face on an end facing normal jet discharge (7) and has, on the side facing spray discharge (9), a lateral, inlet opening (22) into the channel formed by the bypass pipe (21).