Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Reexamination Certificate
2006-12-20
2009-11-03
Jules, Frantz F (Department: 3744)
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
C137S131000, C137S165000, C137S150500, C137S151000, C137S152000, C062S285000
Reexamination Certificate
active
07610697
ABSTRACT:
An automatic draining apparatus of condensation comprises a condensation tank; a float moving up/down along the level of the condensation; a hydraulic pressure chamber consisting of a volume changeable container for containing the condensation, and a check valve provided at an inlet of the hydraulic pressure chamber, the check valve allowing the condensation to flow only into the container, the rising float pulling up the hydraulic pressure chamber so that the volume of the container is reduced and the condensation of the container is pressurized; and a siphon having an inlet connected to the hydraulic pressure, and an outlet being provided at outside and a level of the outlet placing at a lower level of the inlet, the siphon draining the condensation into the outside when the siphon is filled with the condensation discharged from the compressed hydraulic pressure chamber.
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patent: 2005/0005625 (2005-01-01), Lee
patent: 55152385 (1980-11-01), None
Duke Emmanuel
Holme Roberts & Owen LLP
Jules Frantz F
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