High performance flush valve assembly

A flush valve assembly for a water tank of a water closet comprising:

• a valve body which can be secured to the water tank and has a base sleeve portion;
• a flush cover member which is coaxially and slidably mounted with respect to said valve body so that a valve opening is created between said valve body and said flush cover member when said flush cover member is removed from said valve body, said flush cover member being slidably movable between a first position, wherein the flush cover member is seated on the base sleeve portion of the valve body so that water cannot pass through said valve opening, and a second position, wherein the flush cover member is removed from said base sleeve portion of said valve body so that water can pass through said valve opening;
• a flush lever displaceable for a user between a first rest position and a second position to operatively move said flush cover member between its first rest position and said second position;
• and
• trip release means for releasing the effect of said flush lever on said flush cover member when said flush cover member reaches said second position so as to return to said flush cover member to said first rest position prior to said flush lever returning to said first rest position;
• wherein said trip release means is a trip release mechanism coaxially mounted with respect to said valve body and said flush cover member, said trip release mechanism including a cam rod;
• a pull rod operatively connected to said flush lever and slidably mounted with respect to said cam rod so that said pull rod and said cam rod are movable in response to movement of said flush lever;
• and a trip dog assembly including means for engaging said flush cover member when said pull rod and cam rod are moved between a first rest position and a second predetermined position, and means for disengaging said flush cover member when said pull rod moves beyond its second predetermined position;
• wherein said cam rod of said trip release mechanism is mounted within a guide tube of said valve body;
• and
• wherein said guide tube of said valve body includes an inwardly extending annular flange member to restrict movement of said cam rod past its second predetermined position.

A flush valve assembly for a water tank of a water closet comprising:

• a valve body which can be secured to the water tank and having a base sleeve portion;
• flush cover member which is coaxially and slidably mounted with respect to said valve body so that a valve opening is created between said valve body and said flush cover member when the flush cover member is removed from said valve body;
• said base sleeve portion of said valve body having an inlet at said valve opening with a radius incorporated onto a leading edge of said inlet to provide a lead-in angle and to thereby increase the water discharge coefficient;
• said flush cover member being slidably movable between a first rest position, wherein the flush cover member is seated on said base sleeve portion of said valve body so that water cannot pour through said valve opening;
• and a second position, wherein the flush cover member is removed from said base sleeve portion of said valve body so that water can pass through said valve opening;
• sealing means for sealing the valve opening when said flush cover member is in its said first rest position and seated on said base sleeve portion of said valve body;
• guiding means for properly guiding and aligning said flush cover member with respect to said valve body when said flush cover member is moved between its said first and second positions;
• a flush lever displaceable by a user between a first rest position and a second position to operatively move said flush cover member between its said first rest position and said second position;
• and
• trip release means for releasing the effect of said flush lever on said flush cover member when said flush cover member reaches its said second position so as to return said flush cover member to its said first rest position prior to said flush lever returning to its said first rest position, said trip release means being a trip release mechanism that is coaxially mounted with respect to said valve body and said flush cover member;
• said trip release mechanism including a cam rod;
• a pull rod operatively connected to said flush lever and slidably mounted with respect to said cam rod so that said pull rod and said cam rod are movable in response to movement of said flush lever;
• and a trip dog assembly including means for engaging said flush cover member when said pull rod and cam rod are moved between a first rest position and a second predetermined position, and means for disengaging said flush cover member when said pull rod moves beyond its said second predetermined position;
• and
• wherein said engaging and disengaging means of said trip dog assembly includes wing-like retention members which extend outwardly to engage said flush cover member when said pull rod is moved between its said first position and said second predetermined position to move said flush cover member between its said rest and second positions and which retracts when said pull rod is moved past said second predetermined position, disengaging said wing-like retention members from said flush cover member so as to allow said flush cover member to return to its said first rest position.