Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4270250 | Clamping ring for tubular members An improved clamp for hoses and other tubular members includes two rigid clamping members having semi-circular recesses, one or more annular wedge-shaped grooves in the recesses, and fasteners. An elastomeric insert, or a pair of inserts, has one or more ... | 06/02/1981 |
| 4268072 | Pipe coupling for interconnecting pipes experiencing length changes A pipe coupling for interconnecting pipes experiencing length changes, comprising a sealing gasket enclosed within a housing and having a substantially C-shaped cross-sectional configuration and open towards the inside. The end faces of end sections of th... | 05/19/1981 |
| 4265471 | Pipe joint There is disclosed a pipe joint comprising a first pipe having an end portion engaged as a snug fit in a concentric end portion of a second pipe. The pipes have, at positions spaced from their adjacent ends, external annular ribs with corresponding intern... | 05/05/1981 |
| 4262715 | Decorticating drum with selective processing mode An improved decorticating drum with a selective mode of processing is disclosed, composed of a hollow cylinder horizontally resting on support rollers and being rotatable about its longitudinal axis, being adapted to receive wood fed in at one end and dis... | 04/21/1981 |
| 4249786 | Flexible coupling A fixed cavity, integral bonded, flexible coupling for joining ferrule terminated tubing ends in an aircraft environment in which a clam shell coupling is spring loaded at its hinges so as to bias it toward an open configuration. The clam shell coupling l... | 02/10/1981 |
| 4240650 | Leaking weld repair clamp A clamp assembly for sealing a leaking pipe weld or pipe flange joints. The clamp comprises a collar having hinged-together arcuate segments. The collar is further provided with flanges adapted to be bolted together to connect the hinged segments which ma... | 12/23/1980 |
| 4226164 | Split threaded coupling nut A pair of first and second coextensive generally semicylindrical nut halves are provided and include exterior surface portions engageable by hand or tools to facilitate turning of the halves, together, as a unitary nut. The nut halves include coextensivel... | 10/07/1980 |
| 4221405 | Conduit system with expansion coupling and combined spacer and sealing sleeve Insulated jacketed conduit units sealed in end to end relation by expansion couplings are insulated, sealed and spaced at the coupling zones with protective combined spacer and sleeve rings or washers which surround the coupled ends of the conduits, are b... | 09/09/1980 |
| 4215883 | Coupling for pipes and fittings This invention is a ridged pipe coupling so shaped as to allow the same to be tensioned down tightly on a pipe or fitting regardless of slight irregularities or size variations. Th coupling also has provision for use in conjunction with both plain fitting... | 08/05/1980 |
| 4186947 | Radial compression gasket An elastomeric gasket for use with pipe coupled in end-to-end relationship wherein the coupling employs a split collar received within grooves within the pipe's circumference, the gasket being of a transverse cross section including deflectable lateral le... | 02/05/1980 |
| 4186948 | Pipe joint clamp A generally circular pipe joint clamp able to compress a flexible packer around a joint between substantially aligned pipes. The clamp comprises a plurality of plates forming a flexible shield. Each plate overlaps one neighboring plate and underlies the o... | 02/05/1980 |
| 4176865 | Coupling for pipe Improved coupling means for pipe to provide a leak tight joint between abutting pipe sections. Each pipe section is provided with at least one annular, circumferentially continuous depression at each end thereof, the outside of the exterior surface in whi... | 12/04/1979 |
| 4174985 | Process for manufacturing coupling gaskets for helically corrugated spiral pipe A process for manufacturing helically corrugated pipe coupling gaskets is provided wherein a sheet of rectangular flexible gasket material is extruded having parallel corrugations on one side, cutting the sheet across the corrugations at an angle which is... | 11/20/1979 |
| 4172607 | Pipe coupling with plastic sheath A pipe coupling is disclosed, of the type comprising an annular elastic gasket fitted over the two adjacent pipe ends and tightened down with encircling clamp bands. The coupling includes a plastic band surrounding the elastic gasket, with overlapping end... | 10/30/1979 |
| 4171834 | Device for connecting corrugated drainage tiles and the like Disclosed herein is a device for connecting corrugated drainage tiles and the like which comprises a sleeve member which fits around the adjacent ends of coaxial drainage tiles. The sleeve member includes tabs which extend from a first side of the sleeve ... | 10/23/1979 |
| 4161331 | Spherical irrigation pipe coupling with replaceable seal In accordance with the present invention, irrigation pipe couplings for movable irrigation systems may include a spherical coupling structure that allows articulation of sections of the irrigation pipe during operation of the irrigation system. A sealing ... | 07/17/1979 |
| 4159132 | Sealed connection A sealed connection for two cylindrical members includes semi-cylindrical connector sections sized to fit about the members, to bridge the joint between the members, and to be retained in position. An over-center flexing seal is also provided between two ... | 06/26/1979 |
| 4155574 | Simplified pipe coupling A pipe-encircling steel shield includes integral bands with inclined slots for engagement with screw-type tightening elements. The shield compresses a gasket or packing member against the pipe ends to be coupled. This structure reduces the number of parts... | 05/22/1979 |
| 4149740 | Pipe coupling device Disclosed herein is a coupler for joining lengths of corrugated pipe including those provided with radial end flanges. The coupler is comprised of two semicircular sections joined at the ends thereof about the juncture of the pipe lengths. Each section ha... | 04/17/1979 |
| 4147383 | Pipe coupling The pipe coupling includes coupling means overlying and engaging pipe end retainer rings on the juxtaposed ends of two lengths of pipe to be joined. The coupling means includes a band of generally U-shaped cross section having a wide base portion and in-t... | 04/03/1979 |
| 4142743 | Clamping device An apparatus for axially joining two tubular members of differing diameters in which a band of metal is passed around the adjacent ends of the members and circumferentially stressed by means of reinforcing, notched bars secured to the band, to conform wit... | 03/06/1979 |
| 4124236 | Coupling for helically corrugated spiral pipe A coupling for providing a substantially soil tight joint between abutting ends of helically corrugated spiral pipe having a pair of corrugated flexible preformed strips, one located on and encircling each pipe, and a metal tightening band fitted over the... | 11/07/1978 |
| 4119333 | Pipe coupling A pipe coupling comprising a housing which can be clamped about the pipe ends which are to be interconnected, there being enclosed within such housing an inwardly open gasket of substantially C-shaped cross-section having confronting legs constructed as s... | 10/10/1978 |
| 4109944 | Pipe coupling A coupling for unthreaded pipes of a sprinkler system, which permits the replacement of a small damaged pipe section without bending the pipes already emplaced in the ground. The coupling is comprised of a pair of semi-cylindrical pipe sections adapted to... | 08/29/1978 |
| 4108479 | Pipe coupling A pipe coupling comprising a housing which can be clamped about pipe ends which are to be interconnected, and within which housing there is enclosed an inwardly open sealing gasket possessing a substantially C-shaped axial cross-sectional configuration, a... | 08/22/1978 |
| 4101151 | Clamp assembly A pipe-clamping device for coupling together in an end-to-end relationship identical pipe ends, which device comprises a clamping band to encircle the pipe ends, the band having a plurality of slots therein on each side extending generally axially to the ... | 07/18/1978 |
| 4084844 | Device for connecting corrugated drainage tiles and the like Disclosed herein is a device for connecting corrugated drainage tiles and the like which comprises a sleeve member which fits around the adjacent ends of coaxial drainage tiles. The sleeve member includes first tabs at one end which extend from a first si... | 04/18/1978 |
| 4083588 | Coupling A coupling or clamp for clamping a tube or a pipe. The coupling is made up of an elongated band surrounding a gasket. Two laterally spaced notches are formed in one end of the band and strikes are fixed to the other end of the band and disposed in the not... | 04/11/1978 |
| 4050720 | Hot tap for pipeline Two embodiments of a hot tap are disclosed. In the first embodiment, a hot tap is formed around a pipeline. It includes an elongate sleeve divided into two semi-cylindrical portions. The two portions preferably bolt together. They divide along two lengthw... | 09/27/1977 |
| 4050700 | Seal having fluent packing material A seal made of one or more formed sealant receiving grooves, a fitting connected into the groove or grooves to allow sealant to be injected therethrough and a sealant material that can be injected through the fitting into the groove or grooves and that wi... | 09/27/1977 |
| 4049298 | Compression coupling A compression coupling for flexible hose, piping or tubing which has an annular sleeve which surrounds the adjacent ends of the tubes or pipes. The sleeve has the form of a circumferentially extensible annular band with an axially extending gap. A jacket ... | 09/20/1977 |
| 4045060 | Pipe retainer joints A pipe retainer joint particularly for use in connecting lengths of plastic pipe to each other or for connecting plastic pipe to the branches of valves and pipe fittings. The pipe retainer joint in one form of the invention has a central member in which t... | 08/30/1977 |
| 4039210 | Coupling adapter for plastic pipe A means for adapting the end of a plastic pipe for coupling is provided in which the pipe is recessed circumferentially and the recessed area is further indented with three circumferential grooves. A first metal sleeve is shrink-fitted into the recessed a... | 08/02/1977 |
| 4036513 | Pipe fitting A pipe fitting formed of resilient material having two or more end portions disposed at a predetermined angle to each other. A firm metallic sleeve is positioned about the resilient plastic material and a clamp is afforded at each of the end portions. Eac... | 07/19/1977 |
| 4029343 | Expansion joint for prefabricated double-walled metal chimney An expansion and length adjustment joint for a prefabricated double-walled metal chimney is disclosed. The joint provides for easy installation of the chimney at a job site without cutting of chimney sections. To prevent escape of flue gases, at least one... | 06/14/1977 |
| 4029344 | Connection joint for prefabricated metal chimney A prefabricated metal chimney formed of double wall sections which can be connected so that the inner pipe joints are substantially air or smoke tight. The inner pipes of adjacent sections have end flanges which engage and are held together by an inner ba... | 06/14/1977 |
| 4026586 | Plain end pipe joint A coupling for joining the plain ends of pipe; specifically, plain ended, cast iron soil pipe or plastic drain, waste and vent piping. The coupling is particularly adapted to ease of construction and yet furnishes the ability to join and seal pipe and fit... | 05/31/1977 |
| 4018979 | Split shell connector accessory for electrical cables A split shell connector accessory for electrical cables comprising a pair of shell halves having a passage therethrough for receiving and holding a cable. An adapter is mounted at each end of the passage. One shell half has an elastomeric sealing member e... | 04/19/1977 |
| 4015634 | Split-sleeve pipe device with integral seal and insulator A split-sleeve type pipe device for assembly on a pipe for sealing off at a leak, hot tapping a pipe at a desired location, and electrically insulating the pipe for cathodic protection. The coupling includes a one piece gasket insulator having split annul... | 04/05/1977 |
| 4008937 | Coupling assembly A pipe or conduit coupling assembly having a pair of confronting, fluid-conveying members, a longitudinally split coupler removably circumferentially surrounding the fluid-conveying members to limit displacement of the fluid-conveying members away from ea... | 02/22/1977 |
