Measuring and testing – Liquid level or depth gauge – With other measuring device
Reexamination Certificate
2005-05-10
2005-05-10
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
With other measuring device
C073S299000
Reexamination Certificate
active
06889547
ABSTRACT:
An apparatus which indicates a level of a column of liquid in a storage vessel. A liquid level input assembly comprises flexible first and second sealing members which cooperate to form an enclosed chamber therebetween. The column of liquid applies a hydrostatic input force upon the first sealing member. The input force is translated through the first and second sealing members to a liquid measurement assembly to provide an indication of the height of the column. A leak indicating member is coupled to the enclosed chamber to indicate the presence of leaked liquid from the column through the first sealing member. Preferably, the first sealing member comprises a substantially planar diaphragm. The second sealing member also preferably comprises a substantially planar diaphragm, or alternatively preferably comprises a sealing ring. The liquid level input assembly can accommodate pressurized vessels and vessels that are vented to the surrounding atmosphere.
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“685 Liquid Level Indicator for Atmospheric Vessels,” WellMark Series 6851, pp. 1-2, Sec. 1.1, The WellMark Company, L.L.C., Oklahoma City, OK.
“685 Multiswitch Liquid Level Indicator for Atmospheric Vessels,” WellMark Series 685M, pp. 5-6, Sec. 1.3 The WellMark Company, L.L.C., Oklahoma City, OK.
“685S Liquid Level Indicator For Atmospheric Vessels,” pp. 68-69, Major Controls, Inc.
Bellamy Tamiko
Fellers , Snider, et al.
Taylor Innovations, LLC
Williams Hezron
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