Flush system

For converting to automatic operation a flush mechanism of the type that includes a body portion providing an inlet, an outlet, and a valve seat at the outlet, an original cap removably secured to the body portion and forming therewith gera composite chamber, a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber, being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet, and a pilot valve member operable between a first position, in which is prevents flow through the relief opening, and a second position, in which it permits such flow, a replacement assembly comprising:

• A) a replacement cap that forms a composite chamber with the body when the replacement cap is mounted on the body in place of the original cap;
• B) a partition including a control portion fixed in position with respect to the replacement cap and a flexible wall member extending between the fixed-position control portion and the diaphragm, the partition (i) forming a relief chamber communicating with the relief opening, (ii) permitting flexure of the diaphragm, and (iii) generally separating the pilot chamber from the relief chamber and the relief opening when the replacement cap is secured to the body, the control passage forming a pilot passage therethrough so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage;
• C) a replacement pilot valve member movably mounted for translation, when the replacement cap is mounted on the body in place of the original cap, between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and a second position, in which it permits fluid flow therethrough;
• D) a latching pilot operator, secured to the replacement cap and adapted for application of operator control signals thereto, for responding to the operator control signals by operating the replacement pilot valve member between the first and second positions thereof;
• and
• E) a control circuit for applying operator control signals to the sensor operator.

A flush-control mechanism comprising:

• A) a body portion providing an inlet, an outlet, and a valve seat at the outlet,
• B) a cap secured to the body portion and forming therewith a composite chamber;
• C) a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber and being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet;
• D) a partition forming a relief chamber communicating with the relief opening, generally separating the pilot chamber from the relief chamber and the relief opening but permitting flexure of the diaphragm and including a control portion, fixed in position with respect to the cap, that forms a pilot passage so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage, and a flexible wall member extending between the fixed-position control portion and the diaphragm;
• E) a pilot valve member;
• F) a pilot operator, adapted for application of operator control signals thereto, for responding to the operator control signals by operating the pilot valve member between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and second position, in which it permits fluid flow therethrough;
• G) a pressure sensor for sensing a pressure in the composite chamber and generating a pressure signal indicative thereof;
• and
• H) a control circuit responsive to the pressure signal for applying operator control signals to the operator so as to cause it to operate the pilot valve member to the second position for a period of time dependent on the pressure signal and then return it to the first position.

A flush-control mechanism comprising:

• A) a body portion providing an inlet, an outlet, and a valve seat at the outlet,
• B) a cap secured to the body portion and forming therewith a composite chamber;
• C) a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber and being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet;
• D) a partition forming a relief chamber communicating with the relief opening, generally separating the pilot chamber from the relief chamber and the relief opening but permitting flexure of the diaphragm and including a control portion, fixed in position with respect to the cap, that forms a pilot passage so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage, and a flexible wall member extending between the fixed-position control portion and the diaphragm;
• E) a pilot valve member;
• F) a pilot operator, adapted for application of operator control signals thereto, for responding to the operator control signals by operating the pilot valve member between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and second position, in which it permits fluid flow therethrough;
• and
• G) a pH sensor for sensing the pH at a predetermined location and generating sensor signals representative of the sensed pH;
• and
• H) a control circuit responsive to the sensor signals to operate the pilot valve member by applying operator control signals to the pilot operator in response to predetermined characteristics of the sensed pH.

A flush-control mechanism comprising:

• A) a body portion providing an inlet, an outlet, and a valve seat at the outlet,
• B) a cap secured to the body portion and forming therewith a composite chamber;
• C) a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber and being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet;
• D) a partition forming a relief chamber communicating with the relief opening, generally separating the pilot chamber from the relief chamber and the relief opening but permitting flexure of the diaphragm and including a control portion, fixed in position with respect to the cap, that forms a pilot passage so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage, and a flexible wall member extending between the fixed-position control portion and the diaphragm;
• E) a pilot valve member;
• F) a pilot operator, adapted for application of operator control signals thereto, for responding to the operator control signals by operating the pilot valve member between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and second position, in which it permits fluid flow therethrough;
• G) a static-pressure sensor for sensing the static pressure at the predetermined location and generating signal signals representative of the sensed static pressure;
• and
• H) a control circuit for applying operator control signals to the operator but being responsive to the signal signals to refrain from operating the pilot operator when the sensed static pressure exceeds a predetermined value.

For converting to automatic operation a flush mechanism of the type that includes a body portion providing an inlet, an outlet, and a valve seat at the outlet, an original cap removably secured to the body portion and forming therewith a composite chamber, a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber, being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet, and a pilot valve member operable between a first position, in which is prevents flow through the relief opening, and a second position, in which it permits such flow, a replacement assembly comprising:

• A) a replacement cap that forms a composite chamber with the body when the replacement cap is mounted on the body in place of the original cap;
• B) a partition including a control portion fixed in position with respect to the replacement cap and a flexible wall member extending between the fixed-position control portion and the diaphragm, the partition (i) forming a relief chamber communicating with the relief opening, (ii) permitting flexure of the diaphragm, and (iii) generally separating the pilot chamber from the relief chamber and the relief opening when the replacement cap is secured to the body, the control passage forming a pilot passage therethrough so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage;
• C) a replacement pilot valve member movably mounted for translation, when the replacement cap is mounted on the body in place of the original cap, between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and a second position, in which it permits fluid flow therethrough;
• D) a pilot operator, secured to the replacement cap and adapted for application of operator control signals thereto, for responding to the operator control signals by operating the replacement pilot valve member between the first and second positions thereof;
• E) a pressure sensor for sensing a pressure in the composite chamber and generating a pressure signal indicative thereof;
• and
• F) a control circuit responsive to the pressure signal for applying operator control signals to the operator so as to cause it to operate the pilot valve member to the second position for a period of time dependent on the pressure signal and then return it to the first position.

For converting to automatic operation a flush mechanism of the type that includes a body portion providing an inlet, an outlet, and a valve seat at the outlet, an original cap removably secured to the body portion and forming therewith a composite chamber, a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber, being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet, and a pilot valve member operable between a first position, in which is prevents flow through the relief opening, and a second position, in which it permits such flow, a replacement assembly comprising:

• A) a replacement cap that forms a composite chamber with the body when the replacement cap is mounted on the body in place of the original cap;
• B) a partition including a control portion fixed in position with respect to the replacement cap and a flexible wall member extending between the fixed-position control portion and the diaphragm, the partition (i) forming a relief chamber communicating with the relief opening, (ii) permitting flexure of the diaphragm, and (iii) generally separating the pilot chamber from the relief chamber and the relief opening when the replacement cap is secured to the body, the control passage forming a pilot passage therethrough so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage;
• C) a replacement pilot valve member movably mounted for translation, when the replacement cap is mounted on the body in place of the original cap, between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and a second position, in which it permits fluid flow therethrough;
• D) a pilot operator, secured to the replacement cap and adapted for application of operator control signals thereto, for responding to the operator control signals by operating the replacement pilot valve member between the first and second positions thereof;
• E) a pH sensor for sensing the pH at a predetermined location and generating sensor signals representative of the sensed pH;
• and
• F) a control circuit responsive to the sensor signals to operate the pilot valve member by applying operator control signals to the pilot operator in response to predetermined characteristics of the sensed pH.

For converting to automatic operation a flush mechanism of the type that includes a body portion providing an inlet, an outlet, and a valve seat at the outlet, an original cap removably secured to the body portion and forming therewith a composite chamber, a diaphragm secured in the composite chamber, dividing the composite chamber into a main chamber and a pilot chamber, being flexible between an open state, in which it is spaced from the valve seat and permits flow from the inlet through the main chamber to the outlet, and a closed state, in which it seats against the valve seat and prevents flow from the inlet through the main chamber to the outlet, and providing a relief opening therethrough for flow from the pilot chamber to the outlet, and a pilot valve member operable between a first position, in which is prevents flow through the relief opening, and a second position, in which it permits such flow, a replacement assembly comprising:

• A) a replacement cap that forms a composite chamber with the body when the replacement cap is mounted on the body in place of the original cap;
• B) a partition including a control portion fixed in position with respect to the replacement cap and a flexible wall member extending between the fixed-position control portion and the diaphragm, the partition (i) forming a relief chamber communicating with the relief opening, (ii) permitting flexure of the diaphragm, and (iii) generally separating the pilot chamber from the relief chamber and the relief opening when the replacement cap is secured to the body, the control passage forming a pilot passage therethrough so positioned that the partition prevents flow between the pilot and relief chambers except through the pilot passage;
• C) a replacement pilot valve member movably mounted for translation, when the replacement cap is mounted on the body in place of the original cap, between a first position, in which it closes the pilot passage so as to prevent fluid flow therethrough, and a second position, in which it permits fluid flow therethrough;
• D) a pilot operator, secured to the replacement cap and adapted for application of operator control signals thereto, for responding to the operator control signals by operating the replacement pilot valve member between the first and second positions thereof;
• E) a static-pressure sensor for sensing the static pressure at a predetermined location and generating sensor signals representative for the sensed static pressure;
• and
• F) a control circuit for applying operator control signals to the operator but being responsive to the sensor signals to refrain from operating the pilot operator when the sensed static pressure exceeds a predetermined value.