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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7740025 | Method and apparatus for preventing drain line clogging over an extended time using liquid or solid biocides An improved method and apparatus to prevent clogging of condensate drain lines with a biocide delivery system that prevents the growth of bioorganic growth in the liquid trap using time release biocide tablets or liquid biocide. When using solid biocide tablets eros... | 06/22/2010 |
| 6959723 | Oil sealant-preserving drain odor trap Improvements in retention of the oily liquid sealant (20) in a oil-sealed odor trap (10B-10M), for drain applications such as a waterless urinal or anti-evaporation floor drain, are accomplished by minimizing turbulence in the oil sealant, such ... | 11/01/2005 |
| 6662387 | Water trap A water trap comprising a cylindrical outer casing having a flat top wall and a frustoconical bottom wall, an internal substantially semi-circular open topped water seal container within the outer casing, an inlet into the water seal container which passe... | 12/16/2003 |
| 6425411 | Oil sealant-preserving drain odor trap Improvements in retention of the oily liquid sealant (20) in a oil-sealed odor trap (10B-10M), for drain applications such as a waterless urinal or anti-evaporation floor drain, are accomplished by minimizing turbulence in the oil sealant, such as by maki... | 07/30/2002 |
| 6192915 | Sewerage inlet Sewerage inlet having a grating (3), a foliage-retaining basin (4) arranged below said grating (3) and a container provided with an outflow pipe (6) in which container a valve (10) controlled by a float is arranged upstream of the outflow pipe (6) and clo... | 02/27/2001 |
| 6164309 | Liquid filling device A liquid filling device for watering batteries comprises a body having first and second water ports that extend through the body and connect within it to first and second water passages that are independent of one another. A trap is disposed the device at... | 12/26/2000 |
| 6053197 | Horizontal-flow oil-sealant-preserving drain odor trap Improvements in retention of the oily liquid sealant in a oil-sealed odor trap, for drain applications such as a waterless urinal or anti-evaporation floor drain, are accomplished by making the liquid flow path substantially horizontal as a departure from... | 04/25/2000 |
| 5916436 | Drain trap A drain trap for a plumbing drainage system includes a drain pipe having an inlet end for fluid-connection to an area to be drained of liquid, and a discharge end. A drain cup is provided which includes a bottom wall and a side wall joined to the bottom w... | 06/29/1999 |
| 5203369 | Sink-trap A sink trap having a generally semi-global main chamber, a shallow water chamber, a plurality of baffles for supporting the water chamber in the main chamber in an inwardly spaced relation and define a plurality of volute passageways between the main and ... | 04/20/1993 |
| 4432384 | Sewer fluid trap A sewer fluid trap is disclosed, consisting of firstly a rigid flat plate permanently secured to a manhole wall surrounding a sewer pipe outlet. This flat plate has a pair of spaced-apart lateral slots. Secondly, an elbow having a lower end submerged in t... | 02/21/1984 |
| 4263934 | Dental waste trap A waste trap for collecting solid wastes in a drain system connectable at a fitting to a drain pipe. The trap includes a removable receptacle which is disposable or houses a disposable insert when the trap is full. A siphon is associated with the trap to ... | 04/28/1981 |
| 4045346 | Basement sewer trap This device consists primarily of a coupling sleeve for a sewer pipe, and on the interior of the coupling sleeve is supported a cup or well, and on the interior of the cup is supported, a funnel tube beneath a water strainer. The water flows through the s... | 08/30/1977 |
| 4026317 | Waterseal A device, such as a sink trap, for the discharging of waste fluid or the like to a sewer connection. The device comprises a fluid inlet means and fluid outlet means. The fluid inlet means conveys the waste fluid to an inner one of several concentrically a... | 05/31/1977 |
