A pressure balance unit for a valve assembly includes a first shell having a tongue extending therefrom, a second shell having a groove indented therein, and a sliding element having a shaft defining an axis. The groove in the second shell is configured to receive the tongue from the first shell for
A pressure balance unit for a valve assembly includes a first shell having a tongue extending therefrom, a second shell having a groove indented therein, and a sliding element having a shaft defining an axis. The groove in the second shell is configured to receive the tongue from the first shell for aligning the shells. The first and second shells are united using a sonic welding process. The first shell defines a first bore and the second shell defines a second bore. The first and second bores include inlet ports in circumferential faces thereof, the ports defining openings transverse to the axis. The sliding element includes a first end movable along the axis within the first bore and a second end movable along the axis within the second bore. The ends of the sliding element open and close the inlet ports by sliding across the ports.
대표청구항▼
1. A pressure balance unit for a valve assembly, the pressure balance unit comprising: a first shell having a tongue extending therefrom, wherein the first shell defines a first bore;a second shell having a groove indented therein, wherein the second shell defines a second bore;a sliding element hav
1. A pressure balance unit for a valve assembly, the pressure balance unit comprising: a first shell having a tongue extending therefrom, wherein the first shell defines a first bore;a second shell having a groove indented therein, wherein the second shell defines a second bore;a sliding element having a shaft defining an axis and including a separating wall dividing a first hollow core and a second hollow core, a first end movable along the axis within the first bore, and a second end movable along the axis within the second bore, wherein the shaft also includes a first hole, which extends radially relative to the axis and fluidly connects the first hollow core and a first pressure chamber, and a second hole, which extends radially relative to the axis and fluidly connects the second hollow core and a second pressure chamber; anda sleeve provided over at least one of the first end and the second end of the sliding element,wherein the groove in the second shell is configured to receive the tongue from the first shell and wherein the first bore and the second bore are coaxially aligned when the tongue is received in the groove. 2. The pressure balance unit of claim 1, wherein the tongue and groove are substantially semicircular. 3. The pressure balance unit of claim 1, wherein the second shell further includes a second tongue and the first shell further includes a second groove, wherein the second groove is configured to receive the second tongue. 4. The pressure balance unit of claim 1, wherein the first end of the sliding element includes a first sleeve provided thereon, and wherein the second end of the sliding element includes a second sleeve provided thereon. 5. The pressure balance unit of claim 1, wherein the sliding element further includes a circular disc extending radially outward from a central portion of the shaft. 6. The pressure balance unit of claim 5, further comprising a diaphragm bonded to the circular disc and extending radially outward from the disc, wherein the diaphragm forms a barrier between the first shell and the second shell and has a C-shaped cross- section in a flexible portion. 7. A pressure balance unit for a valve assembly, the pressure balance unit comprising: a first shell having a first surface, wherein the first shell defines a first bore;a second shell having a second surface configured to unite with the first surface, wherein the second shell defines a second bore;a sliding element having a shaft having a hollow core and defining an axis, a first end movable along the axis within the first bore, and a second end movable along the axis within the second bore, wherein the shaft also includes a radially extending hole that fluidly connects the hollow core and a pressure chamber; anda sleeve surrounding at least one of the first and second ends of the sliding element,wherein the first surface and the second surface are united to form a sealed perimeter of the pressure balancing unit and wherein the first bore and the second bore are coaxially aligned when the first surface and second surface are united. 8. The pressure balance unit of claim 7, wherein the first surface is united with the second surface to form the sealed perimeter using an adhesive compound or a welding process. 9. The pressure balance unit of claim 7, wherein the first end of the sliding element is surrounded by a first sleeve, and wherein the second end of the sliding element is surrounded by a second sleeve. 10. The pressure balance unit of claim 7, wherein the sliding element further includes a circular disc extending radially outward from a central portion of the shaft. 11. The pressure balance unit of claim 10, further comprising a diaphragm bonded to the circular disc and extending radially outward from the disc, wherein the diaphragm forms a barrier between the first shell and the second shell. 12. The pressure balance unit of claim 11, wherein the diaphragm is overmolded onto the circular disc. 13. A pressure balance unit for a valve assembly, the pressure balance unit comprising: a first shell defining a first bore and including a first inlet port in a longitudinal face of the first bore;a second shell defining a second bore and including a second inlet port in a longitudinal face of the second bore, wherein the second bore is axially aligned with the first bore; anda sliding element having a hollow core shaft defining an axis, a first end movable along the axis within the first bore, and a second end movable along the axis within the second bore, wherein a radially extending hole fluidly connects the hollow core and a pressure chamber;wherein the first inlet port and second inlet port define openings transverse to the axis,wherein the first end and the second end of the sliding element are substantially cylindrical, each end cylinder having a longitudinal axis aligned with the axis defined by the shaft, andwherein the sliding element further includes a sleeve on each end of the shaft. 14. The pressure balance unit of claim 13, wherein the sliding element opens and closes the inlet ports by sliding across faces of the ports, wherein the first end slides across the first inlet port and the second end slides across the second inlet port. 15. The pressure balance unit of claim 13, wherein the first bore and second bore are substantially cylindrical and the first inlet port and the second inlet port are disposed in the circumferential faces of the first bore and second bore respectively. 16. The pressure balance unit of claim 13, wherein the sliding element is substantially hollow and wherein the shaft includes a first hole fluidly connecting the first bore with the first inlet port and a second hole fluidly connecting the second bore with the second inlet port. 17. The pressure balance unit of claim 13, wherein each sleeve is metallic. 18. The pressure balance unit of claim 13, wherein the sliding element is movable along the axis between a first position in which a circumferential face of the first end cylinder covers the first inlet port and a second position in which a circumferential face of the second end cylinder covers the second inlet port. 19. The pressure balance unit of claim 18, wherein the sliding element is configured to move between the first position and the second position in response to a difference in pressure between the first shell and the second shell.
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