Baths – closets – sinks – and spittoons – Flush closet – Bowl
Reexamination Certificate
2006-01-23
2010-12-07
Huynh, Khoa D (Department: 3751)
Baths, closets, sinks, and spittoons
Flush closet
Bowl
C004S323000, C004S434000, C137S205000, C137S907000
Reexamination Certificate
active
07845028
ABSTRACT:
Vacuum sewer system comprising a source of sewage (101), sewer piping (102), a discharge valve (103) between the source of sewage and the sewer piping, means (104) for generating partial vacuum in the sewer piping, and a control means for controlling the operation of the discharge valve. The control means comprises a control mechanism (105) with a body part defining a series of chambers including a first end chamber and a second end chamber, wherein the first end chambers is provided with an activating means (106). The body part (12) is provided with a first port (8) for communication with a source of vacuum (102), a second port (9) for communication with the discharge valve (103) and a third port (10) for communication with an aeration means. The activating means (106) is in connection with a first valve means operating in cooperation with a second valve means, which is displaceable between a first position, providing communication between the second port (9) and the third port (10), and a second position, closing the communication between the second port (9) and the third port (10).
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Evac International Oy
Huynh Khoa D
Kilpatrick & Stockton LLP
Russell Dean W.
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