Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7204380 | Drinking vessel An infant cup includes a cup body 12, a cover 16, a flexible mouthpiece 24 and a valve element 26. The valve element 26 includes a sealing face 70 which closes an orifice 44 in the mouthpiece in a relaxed position. Th... | 04/17/2007 |
| 5979497 | Check valve The valve's flow control is provided by sliding concentric tubes which make or break metal to metal contact in reaction to pressure changes in the inlet and outlet piping. Power for bi-directional operation of the valve is provided entirely by the forces ... | 11/09/1999 |
| 5913330 | Pressure/vacuum relief valve assembly A non-sticking, field replaceable valve seat and pallet assembly for use in a pressure vacuum relief valve. The valve seat is adapted for positioning within a valve orifice inside the valve housing. The valve seat has three guide vanes spaced around and r... | 06/22/1999 |
| 5803112 | Reflux valve means A reflux valve means for a fluid conduit (30) having a fluid outflow end, wherein the valve means includes a vacuum valve (10) intended for connection to a conduit branch (18) preferably to a top part or rising gradient of the conduit upstream of its outl... | 09/08/1998 |
| 5701931 | Water relief valve for a drainage system A water relief valve for a drainage system includes a hollow cylinder body and a poppet valve which is inserted into the top of the cylinder body. The pair is connected to the top of a buried pipe section and is flush with the ground after installation. T... | 12/30/1997 |
| 5564825 | Integral inlet valve and mixer to promote mixing of fluids in a tank A mixer for mixing and blending fluids within a vessel includes a passageway through which fluid is dispensed within the vessel and a flow diverter spaced from the passageway. Fluid impinges on the flow diverter and is directed toward the walls of the ves... | 10/15/1996 |
| 5297579 | Ball and seat-type check valve for downhole rod pump The plunger of the valve has a semi-spherical valve member of reduced diameter, so that it is inwardly spaced from the ribs of the cage. The plunger is centralized and guided by top and bottom stems attached to the ball and working loosely in apertured we... | 03/29/1994 |
| 5203857 | Gas compressor head and discharge valve construction A single or multi-cylinder compressor unit being cylinder wall ported and having suction inlet means to compression chamber means through the wall and top of piston means, wherein suction valve means comprises preferably a light-weight plastic disc means ... | 04/20/1993 |
| 5099878 | Tube mounted low pressure check valve A low restriction valve is provided for mounting to the end of a tube. The valve includes a valve body formed of an elastomeric material which may flex to conform to the shape of the end of the tube to thereby form a seal between the valve and the tube. I... | 03/31/1992 |
| 5036881 | Hydrostatic relief valve A system for relieving excess ground water pressure surrounding a swimming pool is disclosed. A one-way flow valve is inserted in the pool enclosure so as to complete a passageway connecting its opposite sides. The valve comprises an elongated plunger sli... | 08/06/1991 |
| 4934405 | Safety valve A safety valve wherein the downstream end of the body has a threaded portion for securing the safety valve to a high pressure tank. The downstream end of the body also has a passage therethrough interconnecting the downstream end with the upstream end. A ... | 06/19/1990 |
| 4742847 | Excess pressure valve for a boiler of a steamer for the steam treatment of food There is disclosed herein an excess pressure valve for the boiler of a steamer for the steam treatment of food. The boiler includes a pipe leading outward from inside the boiler and the external end has an annular sealing face. A conical valve body closes... | 05/10/1988 |
| 4535807 | Automatic air valve device for ducts The device includes a tubular body, an annular flap cooperating with the tubular body, and a cover cooperating with the tubular body to form a channel or peripheral air inlet beneath the annular flap, which channel is closed by the latter. When a partial ... | 08/20/1985 |
| 4340080 | Inflation valve An inflation valve comprising an outer stem and an inner movable unit is improved by the inner movable unit being confined axially within the tubule by means of a plurality of axially rigid and radially deformable elastic parts in order to permit the inst... | 07/20/1982 |
| 4257445 | Shielded vent port A shielded vent port for equilization of the pressure on opposed faces of a wall comprises a frame for fitting into an opening in said wall, a conduit through said frame, a sloping plate in said conduit, said plate being sealed against the walls of said c... | 03/24/1981 |
| 3990680 | Valve construction and method of making the same A valve construction having a housing provided with an inlet and an outlet interconnected together by a valve seat of the housing carries a movable valve member for opening and closing the valve seat, the valve member having an elongated valve stem extend... | 11/09/1976 |
