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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 |
| 7438090 | Booster valve A flow valve having sealing member having a first condition for engaging a housing to prevent back flow and a platform for obstructing a flow passage through the flow valve with the platform supporting the sealing member in an out-of-the-way condition to allow fluid... | 10/21/2008 |
| 6926030 | Apparatus for mixing two fluids or keeping them separate A mixing apparatus for mixing two fluids immediately following contact with each other is disclosed. The mixing apparatus includes a spring-loaded ball valve separating a first fluid from a second fluid. The ball valve closes as a result of at least spring force. Th... | 08/09/2005 |
| 6912851 | Hydraulic brake valve A hydraulic brake valve comprising a body, a passageway defined in the body, an inlet to the passageway, an outlet from the passageway and a movable valve member in the passageway, the valve member is movable between a first position blocking the passageway to preve... | 07/05/2005 |
| 6835053 | Check valve In the check valve having a valve seat member and the valve member, the valve seat member is provided with first and second conical seats. The second conical seat is positioned upstream the first conical seat. An angle of the second conical seat to an axis of the va... | 12/28/2004 |
| 6581633 | Check valve and method of fabrication A check valve comprising a casing having a flange extending circumferentially around the inner periphery of the body. The flange is constructed by first drilling from a first direction at a diameter less than the predetermined diameter and then drilling f... | 06/24/2003 |
| 6457760 | High speed insertion bailer having snap-in spider for valve alignment A bailer that is substantially leak-free includes an improved valve housing at its lowermost end. A valve body in the form of a solid or hollow hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical valve body seats... | 10/01/2002 |
| 6457486 | Bailer having leak-inhibiting seal A substantially leak-free bailer includes an improved valve assembly at its lowermost end. A valve body is mounted to the lowermost end of a valve stem and the valve stem is slideably received within and guided by a central bore formed on a support member... | 10/01/2002 |
| 6390123 | Bailer having leak-inhibiting seal A substantially leak-free bailer includes an improved valve assembly at its lowermost end. A valve body is mounted to the lowermost end of a valve stem and the valve stem is slideably received within and guided by a central bore formed on a support member... | 05/21/2002 |
| 6286880 | Bailer having leak-inhibiting cushioned seal A bailer that is substantially leak-free includes an improved valve assembly at its lowermost end. In a first embodiment, a valve body in the form of a hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical ball sea... | 09/11/2001 |
| 6263907 | Valve device of a storage tank for transporting oils or chemical compounds A valve device for a storage tank for transporting oils or chemical compounds, includes an upper body having a V-shaped valve seat at an upper end thereof. At least one screw hole with a closing cock is provided in the upper body. A lower body connected t... | 07/24/2001 |
| 6135523 | Bailer having leak-inhibiting seal A bailer that is substantially leak-free includes an improved valve assembly at its lowermost end. In a first embodiment, a valve body in the form of a hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical ball sea... | 10/24/2000 |
| 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 |
| 5904179 | Inlet check valve A check valve assembly mounted on an end surface of a projection of a valve body. The check valve assembly includes a valve having a sealing surface on one side and a stem on an opposite side, and the valve body includes a fluid inlet intersecting the end... | 05/18/1999 |
| 5873384 | Pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere A pressure relief valve includes a valve housing and a drop-shaped body with a conical valve surface that cooperates with a conical valve seat at an upwardly directed blow-off opening of the valve housing. The drop-shaped body is connected to a lifting di... | 02/23/1999 |
| 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 |
| 5678657 | Lubricating device for rotary compressors A rotary compressor includes a cylinder and a motor-driven crankshaft. The crankshaft includes an eccentric portion disposed in the cylinder for forming therewith a compression chamber in which fluid is compressed. A vane is yieldably biased toward the ec... | 10/21/1997 |
| 5669412 | Two-piece check valve assembly A two-piece check valve device comprising a rubber sealing element and a plastic carrier member. A through bore in the plastic carrier member receives the sealing element, which is formed with an annular groove in which the carrier member is removably sec... | 09/23/1997 |
| 5295502 | Non-refillable valve A non-refillable valve for a pressure container which includes a housing with a central passageway, which has a lower portion that is narrower than its middle portion which in turn is narrower than its upper portion. A side port is present in the lower re... | 03/22/1994 |
| 5232016 | Vacuum storage container A vacuum storage container, which comprises a container with a lid for sealing the container; the lid is mounted with a sucking valve, which is a check valve to have the air in the container pumped out only in one-way upon the container being closed herme... | 08/03/1993 |
| 5195552 | Check valve with exchangeable valving elements A check valve wherein the housing has an inlet and a seat at one end and an outlet at the other end. The other end can receive a removable and reinsertable cage which serves to confine a selected one of several spherical and/or otherwise configurated valv... | 03/23/1993 |
| 5121590 | Vacuum packing apparatus Apparatus for evacuating and sealing containers of perishable food or other substances includes a rigid lid for fitting onto the container and a resilientt valve which is situated over a small passage in the lid. The valve has a hollow interior region whi... | 06/16/1992 |
| 5092744 | Intensifier An intensifier for delivering ultra high pressure water to a cutting head of a water jet cutting apparatus. The intensifier has a power piston and cylinder assembly connected to piston members extended into pumping chambers in housing located at opposite ... | 03/03/1992 |
| 5082020 | Valve body for oilfield applications A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the... | 01/21/1992 |
| 5062450 | Valve body for oilfield applications A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the... | 11/05/1991 |
| 4827538 | Mixing fixture for flexible-pipe spray head A faucet for mixing hot and cold water especially for a wash fixture, wash bowl or the like comprises a faucet housing connectable to hot and cold water supply pipes having a mixing or outlet chamber which is connected with a water outlet piece which is a... | 05/09/1989 |
| 4753642 | Container-valve assembly A urine-collecting container-valve assembly particularly intended for use when taking urine from the urinal bladder of a patient, particularly a bed-ridden patient. The assembly comprises a container, made of thin plastic material, having an inlet port wh... | 06/28/1988 |
| 4741325 | Operating valve for a pressure cooker The operating valve for a domestic pressure cooker has a movable body provided with a cone-point valve pintle which rests on the nozzle for the discharge of steam from the pressure cooker. The movable valve body has a lateral steam discharge opening of di... | 05/03/1988 |
| 4724927 | Suction housing of a lubricating-oil pump for the lubricating-oil storage tank of a motor vehicle This invention relates to a suction housing of a lubricating-oil pump inserted in a lubricating-oil storage tank of an aggregate of vehicles having a distributing regulator with a mass that is guided in the direction of the accelerating forces affecting t... | 02/16/1988 |
| 4543980 | Valve for pressurized containers A valve for a pressurized container having a blocking element therein which is adapted to occupy an initial location in which fluid can move in and out of the container past the blocking element. The valve and blocking element are further configured such ... | 10/01/1985 |
| 4535808 | Check valve A check valve particularly useful for water well applications. The valve components are positioned at the low pressure, downstream side of a flexible poppet. A flexible guide, shaped generally as an inverted top hat, snaps into place in an annular groove ... | 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 |
| 4307707 | Control valve for solar heating systems A control valve for a solar heating system is disclosed. The valve has a valve body which defines four chambers disposed end to end. A valve operating rod is movable axially through all four chambers uder motor control and carries a valve member for direc... | 12/29/1981 |
| 4237980 | Check valve for fluid-producing wells A check valve is provided for use in the tubing string of a fluid producing well. The check valve is removably seated within the restricted diameter of a seating nipple in the tubing string. Resilient holddown means at the base of the valve are provided f... | 12/09/1980 |
| 4050243 | Combination solid fuel ramjet injector/port cover A combination injector/port cover for a solid fuel ramjet (SFRJ) having a be-in-hole injector which uses two seals to lock the tube into the air inlet and injector port during the boost phase, and which moves the tube into the combustion chamber during tr... | 09/27/1977 |
