Single handle mixing valve with flow control device for preventing hammer knock
AssigneeMasco Corporation
InventorAlfons Knapp
Life of this patent
Estimating the term…
Abstract
A mixing valve (10) has a control stem (22) for adjusting the movable ball valve (20) for controlling the flow rate and temperature mix of the mixed water. A spring clip (100) is mounted onto a rotatable disc member (70) retained on an upper fixed member (27). The plate member (70) has a slot (74) that receives the control stem (22) of valve element (20). The spring clip (100) has arms (102) with inwardly extending projections (114) that laterally engage the stem (22) to increase the operating force of the mixing valve when the mixing valve is at a preset flow position. The spring clip (100) rotates with the disc to cause no effect upon the temperature adjustment of the ball valve (20).
Claims21
In a faucet mixing valve having a housing with a valve chamber, first and second supply inlet ports and a supply outlet port in communication with said valve chamber, a movable mixing valve element operably mounted in said valve chamber and a control stem extending from said valve element through an opening in said housing to control liquid passing through said ports in both flow rate and temperature mix, said control stem movable in one direction to control the flow of liquid through said supply outlet port and in a second direction to control the ratio of flow through said first and second supply inlet ports, said control stem being operably movable upon the exertion of a first predetermined operating force thereupon;
- the improvement characterized by;
- a wall section mounted in proximity to a section of said movable valve element;
- one of said section of said movable valve element and said wall section housing a resiliently biased projection that is normally disengaged from the other of said valve section and wall section and being laterally engageable with the other of said valve section and wall section when the valve element is moved to a preset flow position such that the control stem is operably movable upon the exertion of a second predetermined operating force at said preset position that is greater than said first predetermined operating force;
- said projection being resiliently biased in a direction substantially perpendicular to the motion of said valve section at the location of the projection engagement with the moving valve section to allow said valve section to move beyond said preset position.
In a faucet mixing valve having a housing with a valve chamber, first and second supply inlet ports and a supply outlet port in communication with said valve chamber, a movable mixing valve section including a valve element operably mounted in said valve chamber and a control stem extending from said valve element through an opening in said housing to control liquid passing through said ports in both flow rate and temperature mix, said control stem movable in a first direction to control the flow of liquid through said supply outlet port and in a second direction to control the ratio of flow through said first and second supply inlet ports, said control stem being operably movable upon the exertion of a first predetermined operating force thereupon;
- the improvement characterized by;
- a wall section mounted in proximity of said movable valve section;
- one of said movable valve section and wall section housing a resiliently biased projection that is normally disengaged from the other of said movable valve section and wall section and being laterally engageable with the other of said movable valve section and wall section when the movable valve section is moved in a selected one of said first and second directions to a preset position such that the control stem is operably movable upon the exertion of a second predetermined operating force that is greater than said first predetermined operating force at said preset position in the regular direction for controlling the position of said control stem;
- said projection being resiliently biased in a direction substantially perpendicular to the motion of said moving valve section at the location of the projection engagement with the moving valve section to allow said moving valve section to operate beyond said preset position.
In a faucet mixing valve having a housing with a valve chamber, first and second supply inlet ports and a supply outlet port in communication with said valve chamber, a movable mixing valve element operably mounted in said valve chamber and a control stem extending from said valve element through an opening in said housing to control liquid passing through said ports in both flow rate and temperature mix, said control stem movable in one direction to control the flow of liquid through said supply outlet port and in a second direction to control the ratio of flow through said first and second supply inlet ports, said control stem being operably movable upon the exertion of a first predetermined operating force thereupon;
- the improvement characterized by;
- a disc member rotatably mounted on said housing and having an elongated slot therethrough with a pair of opposing long edges and a pair of end edges defining said slot;
- said elongated slot sized to receive said control stem;
- a respective resilient flange extending from said disc in proximity to a respective long edge of said slot;
- at least one of said flanges having an inwardly extending protrusion that is selectively operably engageable with said control stem and flexible outwardly to allow said control stem to move axially along said slot.
Dependencies are inferred from the claim text.