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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7240689 | Multiple component mixing head The invention relates to a mixing head and to a method of mixing at least one polyol component and at least one isocyanate component and where appropriate additives, to form a polyurethane reaction mixture. ... | 07/10/2007 |
| 7090194 | Self-priming drain valve Provided is a self-priming drain valve suitable for draining liquid from a tank wherein sediment and other solid matter has accumulated. The valve includes a reverse thread, stem-down to close operation, which allows the valve stem, and attached plug, to disturb the... | 08/15/2006 |
| 6691731 | Corporation stop cleaning device A corporation stop cleaner device includes a T-shaped body having an inlet end, an outlet end, a flushing inlet connection and a flushing outlet connection. The T-shaped body is attached to the fluid inlet of a corporation stop. A removable brush is mount... | 02/17/2004 |
| 6363566 | Drain valve and pipe blockage clearing device A blockage clearing apparatus to clear blockages in both drain valves and in pipes. A cylindrical housing holds a piston connected to a cylindrical rod. The piston moves within the cylindrical housing in response to pressure placed on the piston either ma... | 04/02/2002 |
| 6206021 | Sleeve valve with clean out section A sleeve valve comprises a sleeve and a gate. The sleeve includes an intake, a discharge nozzle section, and a clean-out section. The discharge nozzle section includes a plurality of nozzles. The sleeve is adapted for fluid flow from the intake through a ... | 03/27/2001 |
| 6182677 | Cleanout fitting for air conditioner evaporator drains A cleanout fitting for air conditioner evaporator drains facilitates the mechanical cleanout and hydraulic flushing of the entire drain line from an air conditioner evaporator unit, or air handler. The present fitting essentially comprises an asymmetric T... | 02/06/2001 |
| 5295654 | Metering valve A metering valve for controlling fluid flow is provided which includes a piston assembly disposed between a fluid inlet and a fluid outlet and mounted for relative movement within a tubular unit between a first open mode, a second open mode connecting the... | 03/22/1994 |
| 5285806 | Method and apparatus for temporarily sealing off pipelines A method and apparatus for sealing off flow in a pipeline for the purpose of repairing the line includes a combination of a restraining rod and inflation bag which can be installed on either or both sides of the intended site of repair; and a flexible sle... | 02/15/1994 |
| 4938246 | Cleaning tool for a valve manifold A cleaning tool (46) for removable attachment to a valve manifold (10) upon removal of instrumentation (26) therefrom for cleaning the axial bore (29) of the valve manifold (22). The manifold (22) which has a mounting flange (56) supporting the instrument... | 07/03/1990 |
| 4898201 | Portabl tool for cleaning valve bores and associated inlet passage A portable cleaning tool (12) for cleaning the bore (38) of a valve (10) comprising a tool fitting or connector (52) with a reduced diameter inner end portion (82) having an O-ring (86) for sealing against an enlarged bore portion (40) of the valve body (... | 02/06/1990 |
| 4648419 | Assembly of pipes The present invention concerns an assembly of pipes, particularly but not exclusively submarine pipes, adapted to permit disconnection of a tubular member therefrom while maintaining the interior of the remainder of the assembly isolated therefrom. The as... | 03/10/1987 |
| 4546789 | Valved access fitting A valved fitting for a sewer or drain line access is described which permits easy sewer line entry. The fitting includes a large-straight-bore valve body and a housing which is adapted for connection to a sewer line. Embodiments include removable and perm... | 10/15/1985 |
| 4448247 | Geothermal well head clean out and shut off assembly An assembly for cleaning deposited minerals from the interior passages of first and second axially aligned tubular laterals that extend outwardly in opposite directions from a geothermal well head and removably support first and second gate valves from th... | 05/15/1984 |
| 4391289 | Check valve for rod out A ball check valve connects to a duct leading from a process pipe to a flow transmitter, pressure gauge or sampling analyzer. A unique check valve is connected to the distal end of the straight-through duct. A cleaning rod impales a packing gland which is... | 07/05/1983 |
| 4192342 | Rod out valve A valve connects the duct leading from a process pipe to a flow transmitter, pressure gauge or sampling analyzer. The valve stem of the valve is hollow and aligned with the duct through the connection to process fluid. A cleaning rod is telescoped within ... | 03/11/1980 |
| 4114649 | Lead dosing valve A valve body has outlet ducts to be positioned below the surface of the molten lead, and a head rotatable with respect to the body. The head has recesses which terminate in slots that can be aligned with the outlet ducts to open the valve. These slots hav... | 09/19/1978 |
