Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 6490900 | Pipe gauging and rounding apparatus and method Apparatus and method for gauging and rounding, at room temperature, a section of fully formed seamless ductile iron pipe that has an out-of-round initial cross-section profile and/or a larger than desired initial gauge. The apparatus includes a set of hou... | 12/10/2002 |
| 5993570 | Linepipe and structural steel produced by high speed continuous casting A high strength, high toughness, low carbon/low manganese steel is provided that is further resistant to stepwise cracking and sulfide stress cracking. The steel can be produced by conventional or thin slab casting techniques using normal speeds, with low... | 11/30/1999 |
| 5738140 | Adjustable height extension stem and valve box assembly An adjustable-height extension stem and valve box assembly is provided for use with buried valves that is lightweight, readily adjustable to a large range of heights, and is capable of absorbing loads and impacts such that the loads and impacts are substa... | 04/14/1998 |
| 5520419 | Apparatus for assembling bell and spigot pipe joints A method of and rounding devices for inserting an out-of-round pipe spigot into a pipe bell by installing the rounding devices on the open end of the pipe bell. The rounding devices have cam surfaces for engaging the end of the out-of-round spigot and hav... | 05/28/1996 |
| 5480196 | Ductile iron pipe joint employing a coupling and coupling therefor A pipe joint capable of transmitting high axial compressive loads includes a reduced wall thickness section at the ends of the pipe to be joined and a coupling sleeve supported in telescoping relation with the reduced wall thickness section. Shoulders for... | 01/02/1996 |
| 5426842 | Method of assembling bell and spigot pipe joints A method of and rounding devices for inserting an out-of-round pipe spigot into a pipe bell by installing the rounding devices on the open end of the pipe bell. The rounding devices have cam surfaces for engaging the end of the out-of-round spigot and hav... | 06/27/1995 |
| 5277242 | Pipe casting machine having improved pipe mold stabling rings A stabilizing ring assembly for stabilizing a mold in a centrifugal pipe casting machine during operation includes a plurality of ring segments mounted on the mold and cooperating to form an annular ring retained in the mold by a plurality of resilient O-... | 01/11/1994 |
| 5197768 | Restrained joint having elastomer-backed locking segments A pipe joint and a locking member for use with the pipe joint are provided for a bell and spigot type joint, the locking member being a separate element disposed axially outwardly of a fluid seal gasket within the bell end of a first of the pipe elements,... | 03/30/1993 |
| 5067751 | Gasket for field adaptable push-on restrained joint and joint thus produced A self-actuating restraining gasket having optional integral sealing means is provided which is used particularly in bell-and-spigot pipe joints or joints employing pipe appurtenances, and more particularly in joints to be assembled in the field, the bell... | 11/26/1991 |
| 4987013 | Process for lining pipe A computer controlled concrete injector pump and process for lining pipe comprises a pump chamber having an outlet connected to a spray lance through a first check valve and having first and second inlets, one inlet being connected through a second check ... | 01/22/1991 |
| 4968002 | Boltless bonnet assembly for gate valve A boltless bonnet assembly is provided for use with a valve, particularly a gate valve having a valve body comprising an upper housing, a lower fluid passageway, a gate, and a valve stem having a thrust washer. The bonnet assembly has a bonnet with a lowe... | 11/06/1990 |
| 4913089 | Concrete injector pump and process for lining pipe A computer controlled concrete injector pump and process for lining pipe comprises a pump chamber having an outlet connected to a spray lance through a first check valve and having first and second inlets, one inlet being connected through a second check ... | 04/03/1990 |
| 4830266 | Method of producing weld metal tubing empoying a reusable mandrel A method of producing substantially distortion-free weld metal tubing wherein a mandrel and a thin metal layer covering the mandrel are used to provide structural support for a starter tube while a weld metal is being deposited on the exterior surface of ... | 05/16/1989 |
| 4685708 | Axially restrained pipe joint with improved locking ring structure An improved form of articulated, segmented ring structure for an axially restrained pipe joint has an articulated, segmented ring formed from articularly interconnected ring segments and a ring adjustment mechanism operable from the exterior of the pipe j... | 08/11/1987 |
| 4643466 | Pipe joint assembly with snap ring and associated method A pipe joint is restrained against axial separation by the use of a bearing ring. Various embodiments of bearing rings having wedging surfaces cause an increase in the resistance to pipe separation as the joint separating thrust increases. That is, as the... | 02/17/1987 |
| 4597995 | High speed pipe lining method and apparatus High speed pipe lining is accomplished by supporting a length of pipe to be lined between spindles in a lathe-type apparatus and rotating the pipe at a speed sufficient to afford a G-force of the order of 10-15 G's. A rather fluid concrete mixture compris... | 07/01/1986 |
| 4524505 | Method of assembling a pipe joint A method of assembling a pipe joint uses a bearing ring with closure nuts and spreader nuts. The closure nuts are used to fix the ring to a spigot, which then has a socket disposed around it. The closure nuts are loosened such that the ring expands in dia... | 06/25/1985 |
| 4474134 | Method and apparatus for coating the interior surface of metal pipes A method and apparatus for coating metal pipe with a thixotropic coating having a wet film thickness between 30 to 120 mils. The coating is a coal tar epoxy made up of a two component resin and pigment blend with the pigment comprising two sizes of glass ... | 10/02/1984 |
| 4456288 | Snap ring and restrained pipe joint using said snap-ring A pipe joint is locked against separation by a split snap-ring assembly including a ring adjustor outside of the plane of the snap-ring. The snap-ring assembly is especially well suited for use with spigot and socket joints of large diameter pipe. The pip... | 06/26/1984 |
| 4455329 | Method for coating the interior surface of metal pipes A method for coating metal pipe with a thixotropic coating having a wet film thickness between 30 to 120 mils. The coating is a coal tar epoxy made up of a two component resin and pigment blend with the pigment comprising two sizes of glass beads. The coa... | 06/19/1984 |
| 4428604 | Restrained pipe joint and associated snap-ring A pipe joint is locked against separation by a split snap-ring assembly including a ring adjustor outside of the plane of the snap-ring. The snap-ring assembly is especially well suited for use with spigot and socket joints of large diameter pipe.... | 01/31/1984 |
| 4402531 | Fire hydrant nozzle assembly A fire hydrant nozzle assembly which permits a bronze fire hydrant nozzle to be readily and simply attached to a cast iron hydrant barrel without the use of lead caulking, screw threads, or other methods generally requiring machining. Un-intentional remov... | 09/06/1983 |
| 4327798 | Method of applying flux A method for introducing fluxing material (flux) into a tubular, centrifugal casting mold in the manufacture of centrifugally cast metallic tubes. The flux is injected directly into the pouring stream of the molten metal in a steady, continuous flow by th... | 05/04/1982 |
| 4254165 | Method of forming a filled polymer coating on an internal cylindrical surface and article produced thereby A filled, low or medium density polyethylene or other polyolefin composition is used to form a polymer coating on an internal cylindrical metal surface such as, for example, the interior surface of a pipe.... | 03/03/1981 |
| 4095643 | Agent feeder for pipe casting apparatus Apparatus is disclosed for feeding an inoculating or nucleating agent or particle to a trough of a pipe casting apparatus or beneath the surface of molten metal within a ladle. In particular, the agents are introduced by a hopper into a sealed chamber by ... | 06/20/1978 |
