Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 4423284 | Moulding duct A generally rectangular wiring raceway having the form of a moulding duct and capable of housing cable TV, telephone, computer, low voltage and other cables. The duct is designed such that it may be opened and closed for initial cable installation, for li... | 12/27/1983 |
| 4413654 | Clean out device A clean out device includes a frame which is welded into a pipe conduit clean out elbow or the like and has a cover and clamping assembly which pulls the cover up into sealing engagement with the frame. When the clamping assembly is actuated in the opposi... | 11/08/1983 |
| 4408636 | Reheater isolation device and chemical connector A combination reheater isolation device and chemical connector is provided which is particularly adapted for use on lines leading to and from the reheater in a boiler-turbine plant system wherein the device can be used under normal system working conditio... | 10/11/1983 |
| 4398564 | Sealed lay-in wireway A sealed lay-in wireway comprised of channel members secured together in end-to-end relation with sealing flange gaskets thereinbetween and having longitudinally spaced covers having resilient gaskets extending continuously along their periphery and havin... | 08/16/1983 |
| 4391426 | Support strip with U-shaped cross-section of plastic material for supporting conduits, cables and the like A support strip (FIG. 2) of plastic material with U-shaped cross-section and for supporting conduits, cables etc. has a substantially plane bottom (2) and side walls (3), which support strip (1) in its bottom surface close to the longitudinal edges of the... | 07/05/1983 |
| 4387740 | Cam-flange A flange closure formed of a flange body having a cylindrical opening therethrough and having in the opening a concentric internal groove, a cylindrical closure plate for removably closing the opening in the flange body, the closure plate being removable ... | 06/14/1983 |
| 4378032 | Slotted concrete pipe Concrete pipe including a hollow tube of concrete with a grid of reinforcing bars embedded therein. A plurality of inserts are embedded in the concrete pipe in between the bars of the grid and have passageways therethrough to form slots between the interi... | 03/29/1983 |
| 4349220 | Raintight wireway A gangable wireway assembly including a plurality of generally U-shaped troughs and trough covers utilized as either tandem sections or as fittings which connect the tandem sections in an elbow, tee or cross configuration. Trough covers have upstanding li... | 09/14/1982 |
| 4344460 | Apparatus for plugging a pressure piping system An apparatus for plugging a pressure piping system includes one or more segments that may be positioned in the system to hold a plug therein. Each segment is held in position by a holding assembly including a plunger slideably mounted within the apparatus... | 08/17/1982 |
| 4339054 | Pressure relieved plug and socket cleanout assembly A plug and socket cleanout assembly for fluid transmission lines, storage tanks, and like receptacles comprises a socket connectible to the receptacle and communicating therewith. A plug is removably seated in the socket, there being a relatively tapered ... | 07/13/1982 |
| 4335757 | Temporary pipeline capping unit and method of using same A temporary pipeline capping unit wherein the unit is permanently attached over an opening in a pipeline and includes a capped branch line nipple and an internal element isolating the branch line nipple from the pipeline opening whereby a branch line can ... | 06/22/1982 |
| 4286630 | Surface ducting Surface ducting comprising a body portion and a removeable lid, the body portion having a base, first longitudinal channels defined by longitudinally extending ribs which are upstanding from the base, and a pair of second longitudinal channels which are a... | 09/01/1981 |
| 4281540 | Low turbulence wind tunnel stilling chamber A wind tunnel in which high energy laser beam impingement studies can be ducted such that beam distortion and degradation is substantially precluded. Uniform, low turbulence flow in which thermal blooming, creation of wakes is substantially eliminated is... | 08/04/1981 |
| 4269231 | Below surface ducting Ducting for installing below a surface, which ducting comprises a body portion and a lid, the body portion having a first longitudinal channel, a pair of second longitudinal channels arranged one on each side of the first channel, and at least two separat... | 05/26/1981 |
| 4262701 | Concrete pipe lift hole plug A plug for obturating the lift hole of poured concrete drain pipes or conduits. The plug, preferably made of a plastic molding, comprises a generally thin head in the form of a plate and a shank projecting from the lower surface of the plate. The shank ha... | 04/21/1981 |
| 4249577 | Process and apparatus for sealing gas lines A safe, easy and fast procedure and apparatus for sealing by welded steel plugs branch lines connected to conduits through which gas is flowing, uses a low-carbon steel plug which does not develop cracks on cooling from welding temperature; such plug is a... | 02/10/1981 |
| 4239602 | Ascension pipe elbow lid for coke ovens An improved ascension pipe elbow lid for coke ovens forms a communication means between the coke oven and the volatile products collecting main. The improved structure incorporates a vent which is sealed to prevent the escape of pollutants into the atmosp... | 12/16/1980 |
| 4234006 | Method of forming an opening in the outer enclosure of a gas-insulated electrical apparatus Electrical apparatus includes an outer enclosure, an electrode within the enclosure, and an insulating gas electrically insulating the electrode from the enclosure. A support plate is secured to the outer enclosure, and the support plate has an opening th... | 11/18/1980 |
| 4209163 | Dump valve assembly A dump valve assembly for opening and fluid-tightly sealing the drain outlet of a waste tank, the assembly comprisng a rotatable elongated shaft having a handle at its upper end and a first or lower compression plate adjustably secured to its lower end. D... | 06/24/1980 |
| 4206784 | Access door An access door primarily designed to provide an insulated entrance to heating, ventilating and air conditoning ducts consisting of a two-pan structure lockably connected together by a simple unfastening means.... | 06/10/1980 |
| 4163572 | Transition fitting A pair of self-clamping couplings are secured to the opposite walls of a feeder duct. The ends of a pair of branch ducts are respectively supported on the couplings. A cover closes off the space between the branch ducts and is held in position by engageme... | 08/07/1979 |
| 4153067 | Method and apparatus for providing removable Service to connections to a high pressure main A sacrificial top tap T and the method of using such a T to tap into a main supply pipe in such a manner that the T may ultimately be plugged and the greater portion thereof removed from the main supply pipe in such a manner as to protect the remaining T ... | 05/08/1979 |
| 4111107 | Double walled smokestack apparatus Double walled smokestack apparatus is provided in accordance with the teachings of the instant invention having substantially independent, load bearing inner and outer portions which are concentrically disposed to form a thermally insulating air space the... | 09/05/1978 |
| 4077434 | Sealed lay-in conduit duct A sealed lay-in electrical conduit duct which is oil-tight and is comprised of U-shaped sealing collars which telescope into adjacent ends of aligned open ended sheet metal duct sections which are troughs generally U-shaped in cross-section and have their... | 03/07/1978 |
| 4067353 | Pipeline tap and connecting device An invention relating to a device adapted to connect a branch line to a main pipeline without interrupting flow of fluid through the mainline. The device includes a pair of tubular, cutter-containing portions and a branch line connection. The device furth... | 01/10/1978 |
| 4040449 | Oil-tight lay-in duct Lengths of lay-in ducts, each in the form of an open top trough having exterior connecting flanges at its ends, are connected together in end to end relation in a run by bolts passed through the flanges. Each trough is provided with a cover which terminat... | 08/09/1977 |
| 4032455 | Traps for sinks, laundry tubs and the like A trap for use with waste water lines for sinks, laundry tubs and the like has a dip portion for retaining liquids to prevent the reverse flow of noxious gases. The lower wall of the dip portion has an opening which is smaller than the interior diameter o... | 06/28/1977 |
| 3977730 | Junction elements for pneumatic conveyor pipes Junction elements for pneumatic conveyor systems for use in, for example, power stations include a pair of intersecting arms and an impact plate at the outside of the junction between the arms. The impact plate is reinforced by a reinforcing plate which i... | 08/31/1976 |
| 3940308 | Suction pipe with quick disconnect cover A suction pipe for a paper machine having a tapered seat and a cover and an insert mounted in the seat to provide an air tight seal therewith. The insert and the cover being laterally removable from the seat after sufficient longitudinal travel of the cov... | 02/24/1976 |
