The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1995
Filed:
May. 11, 1993
Thomas R Baughman, Clifton Park, NY (US);
Clark A Henry, Scotia, NY (US);
Andrew P Sleasman, Gansevoort, NY (US);
William R Schouten, Castleton, NY (US);
Gene A Rougeux, Boiceville, NY (US);
Environment/One Corporation, Schenectady, NY (US);
Abstract
An integral, readily installed, universal pump assembly has an integral, liquid-tight outer housing for supporting within a single liquid-tight containment vessel an electric motor driven pump, and discharging liquid from a discharge outlet of the pump. The assembly includes at least one normal high and low liquid level sensing control pneumatic pressure operated electric switch supported within the housing for deriving on-off switching control signals for controlling normal on-off operation of the pump. At least one liquid level sensing diving bell is supported on the housing and has at least one lower open end exposed to the liquid in the collection tank for deriving varying pressure pneumatic liquid level indicating signals for application to the pressure operated switch for deriving the on-off control signal. A dynamically operated liquid level safety cutoff valve is provided within the sensing diving bell for cutting off leakage of liquid into the normal on-off control switch upon the liquid level in the sensing diving bell exceeding a predetermined level. A second liquid level sensing diving bell and pressure operated control switch may be added for deriving a high liquid level alarm output signal. The housing contains a single, closed, liquid-tight chamber in which both the pneumatic pressure operated on-off control switch and a high liquid level alarm pressure operated, control switch