Abstract: A mounting plate assembly for use in aligning electrical and plumbing components of a toilet flush valve installation includes a pair of rails having openings therein for use in attaching the assembly to wall studs of variant spacing. There is a plate with openings and fasteners on the plate and rails for variable mounting of the plate to the rails. The plate has an opening for installation of an electrical box and at least one opening for a water inlet pipe. A pipe locater is used to properly position a pipe within the plate opening. There are openings at upper and lower portions of the plate to insure its correct vertical alignment with a water drain from a toilet fixture.

Abstract: A mounting plate assembly for use in aligning electrical and plumbing components of a toilet flush valve installation includes a pair of rails having openings therein for use in attaching the assembly to wall studs of variant spacing. There is a plate with openings and fasteners on the plate and rails for variable mounting of the plate to the rails. The plate has an opening for installation of an electrical box and at least one opening for a water inlet pipe. A pipe locater is used to properly position a pipe within the plate opening. There are openings at upper and lower portions of the plate to insure its correct vertical alignment with a water drain from a toilet fixture.

Abstract: A piston assembly for use in a flush valve. The piston assembly is movable in the body toward and away from the valve seat to control flow from the inlet through the outlet. There is a relief valve in the piston assembly for venting a flush valve pressure chamber to the flush valve outlet. The piston assembly has an outwardly directed lip seal which bears against an interior wall of the body, with the lip seal being held between facing elements of the piston assembly. The lip seal includes an insert and an elastomer overlying and substantially enclosing the insert. Both the elastomer and the insert have portions extending toward the flush valve body wall and the insert has support elements which are in contact with the facing elements of the piston assembly to take the load from such elements off of the elastomer body of the lip seal.

Abstract: A flush valve includes a body having an inlet and an outlet. There is a valve seat at the outlet and a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet through the outlet. A pressure chamber is located in the body above the piston assembly and normally maintains the piston assembly closed upon the valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. The piston assembly includes a vent passage connecting the pressure chamber with the outlet. There is a relief valve in the piston assembly controlling flow through the vent passage. There is a seal extending about the vent passage and a spring urges the relief valve toward the seal to close the vent passage.

Abstract: A piston assembly for use in a flush valve for operating toilets and urinals, with the flush valve having a body having an inlet and an outlet and a valve seat at the outlet. The piston assembly is movable in the body toward and away from the valve seat to control flow from the inlet through the outlet. There is a relief valve in the piston assembly for venting a flush valve pressure chamber to the flush valve outlet. The piston assembly has an outwardly directed lip seal which bears against an interior wall of the body, with the lip seal being held between facing elements of the piston assembly. The lip seal includes an insert and an elastomer overlying and substantially enclosing the insert. Both the elastomer and the insert have portions extending toward the flush valve body wall and the insert has support elements which are in contact with the facing elements of the piston assembly to take the load from such elements off of the elastomer body of the lip seal.

Abstract: A flush valve includes a body having an inlet and an outlet. There is a valve seat at the outlet and a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet through the outlet. A pressure chamber is located in the body above the piston assembly and normally maintains the piston assembly closed upon the valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. The piston assembly includes a vent passage connecting the pressure chamber with the outlet. There is a relief valve in the piston assembly controlling flow through the vent passage. There is a seal extending about the vent passage and a spring urges the relief valve toward the seal to close the vent passage.

Abstract: A flush valve includes a body with an inlet and an outlet and a valve seat at the outlet. There is a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet to the outlet. There is a pressure chamber in the flush valve body which maintains the piston assembly on its valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. There is a relief valve in the piston assembly for venting the pressure chamber to the outlet. The piston assembly includes a guide and a piston attached thereto. There is a seal having an annular perimeter portion which is positioned between facing surfaces of the guide and piston and the seal has an annular interior portion positioned on the relief valve seat to form a seal with a relief valve. The seal interior portion and perimeter portion are connected by plurality of radially extending ribs permitting a degree of relative movement between the seal interior and perimeter portions.

Abstract: A flush valve includes a body having an inlet and an outlet and a valve seat at the outlet. There is a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet through the outlet. A pressure chamber is formed in the body above the piston assembly, at least in part by a cover attached to the body. Pressure in the pressure chamber normally maintains the piston assembly closed upon the valve seat. There is a relief valve in the piston assembly for venting the pressure chamber to the outlet, permitting the piston assembly to move away from the valve seat to open flow through the outlet. There is an adjustment assembly located in the flush valve cover which permits adjustment of piston assembly stroke. The adjustment assembly includes a housing mounted in the cover, a sleeve axially movable in the housing, and an adjustment element for causing movement of the sleeve.

Abstract: A flush valve includes a body with an inlet and an outlet and a valve seat at the outlet. There is a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet to the outlet. There is a pressure chamber in the flush valve body which maintains the piston assembly on its valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. There is a relief valve in the piston assembly for venting the pressure chamber to the outlet. The piston assembly includes a guide and a piston attached thereto. There is a seal having an annular perimeter portion which is positioned between facing surfaces of the guide and piston and the seal has an annular interior portion positioned on the relief valve seat to form a seal with a relief valve. The seal interior portion and perimeter portion are connected by plurality of radially extending ribs permitting a degree of relative movement between the seal interior and perimeter portions.

Abstract: A battery-powered faucet control module has a housing, with a base portion and a cover portion. The cover portion is removably attached to the base portion. There is an electric control board mounted in the housing base portion and an electrically-operated control valve is associated with the housing and electrically connected to the control board. There is a cavity in the housing base portion and a removable battery pack is positioned within the cavity. The battery pack has positive and negative contact straps on the exterior thereof. There are positive and negative spring contacts connected to the electric control board and such spring contacts are in engagement with the positive and negative contact straps when the battery pack is positioned within the housing cavity.

Abstract: A faucet and sensor mounting includes a faucet spout and an elastomeric filler ring having a central opening stretchable to pass over the faucet spout to provide for positioning the filler ring on a sink deck and about a previously installed spout. There is a trim plate which has a faucet spout opening of a size to pass over the faucet spout to provide for positioning the trim plate in place on a previously installed faucet spout. The trim plate faucet spout opening is of a size to cover a portion of the filler ring with an interior portion of the filler ring extending closely about the faucet spout and outwardly through the trim plate faucet spout opening. There is a sensor opening in the trim plate spaced from the faucet spout opening and a sensor is positioned in the sensor opening. There is an anti-rotation pin opening adjacent the sensor opening and an anti-rotation pin positioned in the opening and extending into the sensor to prevent rotation thereof.

Abstract: A splashproof enclosure for use in mounting the electrical control circuits for connecting electric power to a sensor operated electric actuator for a toilet room plumbing device such as an electronic faucet includes a base and a cover mounted on the base. The base is formed and adapted to mount on a toilet room wall and has a power cord opening so that a power cord may enter said enclosure from the rear. There are spacing channels on the side of the base facing the toilet room wall to space the base from the wall to allow fluid to flow behind the enclosure. There is a dam positioned on the upper side of the power cord opening and extending toward the toilet room wall to divert fluid around the power cord opening. The cover is attached to the base and there are seal elements between the cover and base preventing the entry of fluid into the interior of the enclosure. There are cable entrance ports in the cover and the base providing a plurality of openings for cables for the sensor and electric actuators.

Abstract: A sensor assembly for use in a toilet room for detecting the adjacent presence of the user of a toilet room device has a body with a hollow threaded mounting shank extending outwardly therefrom. The body has a platform and there is an upwardly extending wall on the platform which defines a chamber. An infrared transmitter and an adjacent infrared receiver are positioned within the chamber on a P.C. board. There is an electrical cable attached to the mounting board and which extends through the threaded shank. A shroud extends about the transmitter and receiver and has a pair of adjacent openings in alignment with the transmitter and receiver. The wall has an infrared transparent window in alignment with the transmitter and receiver openings in the shroud. A cap extends over the wall, chamber and window and is seated upon the platform.

Abstract: A flush valve includes a body having a water inlet and a water outlet. There is an inner cover mounted on the body and with portions of the flush valve defines a chamber which is in communication with the flush valve inlet. A sensor for detecting the presence of an object adjacent the flush valve is mounted on the inner cover, as is an electrical circuit for causing operation of the flush valve. There is an outer cover which encloses the inner cover, sensor, and electrical circuit. The outer cover is formed of a plastic which will transmit radiation from the sensor whereby the sensor can detect the presence of an object adjacent the flush valve. The inner and outer cover have interfitting lugs which restrict relative rotation therebetween and provide a means for attaching the covers to the flush valve body through the use of a ring which applies a load only to the inner cover.