Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5022149 | Method and apparatus for making a looped fin heat exchanger A heat transfer device effective in minimizing frost bridging in refrigeration operations to be wound helically onto a refrigerant-carrying tube, has an integrally formed chain of looped fins, each fin having a mounting flange at each end of the chain, an... | 06/11/1991 |
| 5016349 | Method for manufacture or repair of a globe valve Method for the manufacture or repair of a globe valve. The valve housing (1) is assembled by welding out of two or more parts around a closing member (4) shaped as a part of the face of a globe and provided with a flow opening (3), and the shaft (5) of ro... | 05/21/1991 |
| 5010634 | Vehicle assembly method and apparatus In order to facilitate rapid automatic set up and adjustment of a robotic assembly arrangement in a manner which produces the required precision, pre-recorded data and expert system software are teamed together and used to set robotic support jigs and mov... | 04/30/1991 |
| 5003691 | Mechanical tube expander with hairpin bend support A hairpin tube receiver includes a plurality of inependently rotatable receiver posts which have cavities in their upper ends for receiving the bends of hairpin tubes. The receiver posts can be independently rotated to selectable positions in order that t... | 04/02/1991 |
| 4998335 | Method of replacing a bolt in work A ruined bolt in work is replaced on removing the same by destroying it on burn-out of its mounting shank from the usual tapped hole in work with ensuing mutilation of the tapped hole, and simply driving a replacement bolt with its self-tapping threaded m... | 03/12/1991 |
| 4996768 | Camshaft installation method A method for guiding a camshaft into place in an engine includes using a tool which includes a cylindrical sleeve or body having a smooth outer surface of slightly smaller diameter or no larger than the bearing surfaces of the camshaft. An alignment pin h... | 03/05/1991 |
| 4987670 | Method of assembling an overrunning roller clutch with improved spring retention An improved spring retention for a roller clutch energizing spring includes a relatively narrow, flexible and axially disposed retention tab lanced out of the flat end leaf of the spring, which snaps into an equally narrow, axially disposed retention groo... | 01/29/1991 |
| 4985991 | Method of making a screw-on electrical connector A screw-on electrical connector is made by a method in which the manufacturing procedure or process is greatly simplified and the resultant connector is of a high quality. method or procedure involves bringing an insulating shell into contact with a coil ... | 01/22/1991 |
| 4980966 | Rod holder for the assembly of heat exchangers A structure is provided for mounting the expander rods of a mechanical tube expander. The mounting structure comprises a slide plate which can be moved between a first position in which the expander rods are in locked condition and a second position in wh... | 01/01/1991 |
| 4976027 | Device for lining a peripheral tube of a steam generator A curved structure (20) with two flat side flanges and a curved bottom (23') connecting the flanges, each of which is associated with a curved guiding slide (24a,24b)is used for lining a peripheral tube of a steam generator. A trolley (21) having wheels (... | 12/11/1990 |
| 4974782 | Pressure developer and rolls therefor having segments of elastomeric material for control of modulus of elasticity A two roll pressure developer for a microencapsulated web or medial material includes rolls which have a support shaft through the center, a hollow annular shell, and load-bearing elastomer material between the shaft and the shell supporting the shell and... | 12/04/1990 |
| 4972571 | Method of making a ladder Ladder constructions and methods of forming the same wherein box-type or tubular rails are employed. The rung-to-rail connection or joint is formed by providing an opening in one of the rail side walls and an aligned clearance hole in the opposite rail si... | 11/27/1990 |
| 4970783 | Method of making split remateable connecting rod portions A method of cracking bearing assembles including the steps of (a) forming a ductile metal (steel, aluminum or titanium) connecting rod in one piece (e.g., by hot forging) having an annular wall defining a crankshaft opening with preformed surface crevices... | 11/20/1990 |
| 4969255 | Apparatus for producing heat exchanger tubes An apparatus is provided for producing metallic heat exchanger tubes having a heat exchange surface that is increased by fins. A rotating tube has helically wound on its outer surface a strip that forms the fins, with this strip being fed to the tube surf... | 11/13/1990 |
| 4969263 | Method of making a cast engine cylinder having an internal passageway A cast cylinder for an internal combustion engine having an intake valve cavity located on one side of the piston bore, an intake bore for communication with a carburetor located on the other side of the piston bore, and an internal passageway cast therei... | 11/13/1990 |
| 4969261 | Method of assembling cam follower device A method for assembling a cam follower in a rocker arm of a valve drive mechanism comprises the steps of forming through the walls of the rocker arm a first through-hole which has an inner diameter slightly larger than the outer diameter of the cam follow... | 11/13/1990 |
| 4967468 | Apparatus for fixing boiler tubes during replacement of same Apparatus for facilitating removal of spent tubes from boilers or heat exchangers in environments where access to one side of the wall through which the tube extends is limited. The apparatus includes a jaw assembly that is movable between a retracted pos... | 11/06/1990 |
| 4962577 | Work roll with improved support and lubricating system for an hydraulically supported roll In a roll having a hollow roll through which a stationary cross piece extends, a bearing housing is provided for a bearing which engages an axial extension of the hollow roll. The extension has a smaller outer diameter than the outer diameter of the hollo... | 10/16/1990 |
| 4958421 | Method for assembling a venetian blind Venetian blind ladder means are provided in which first and second cross elements (4,5) of each cross connections of the ladder are located whereby the height of the projection of every pair of elements on a plane through the longitudinal side member axes... | 09/25/1990 |
| 4953290 | Method of connecting heat exchange tubes to a fluid conveying duct A method of securing in fluid tight relation the spaced ends of straight legs of heat exchange tubes of a U-shaped matrix to a tubular fluid conveying duct is effected by bending the spaced ends of the straight legs of the matrix to reduce the spacing bet... | 09/04/1990 |
| 4953282 | Stator vane mounting method and assembly A mounting assembly for supporting stator vane platforms formed in an extended arc length, such as 90°, in a compressor casing, comprising a circumferential flange formed in the compressor casing having spaced clamp arms, a flange carried on each stator ... | 09/04/1990 |
| 4951390 | Turbine blade repair A method of and apparatus for repairing turbine blades wherein the repair requires the input of considerable thermal energy during a welding or brazing operation for example. The method involves the step of pre-distorting the blade prior to the welding or... | 08/28/1990 |
| 4951372 | Method for adjusting injection ports in a fuel injection valve A fuel injection valve and a method for adjusting its fuel quantity are proposed. The fuel injection valve is used to inject fuel into the intake system of a mixture-compressing internal combustion engine having externally supplied ignition. It has a valv... | 08/28/1990 |
| 4947547 | Method of manufacturing a camshaft A camshaft for controlling valves in internal combustion engines includes a shaft and at least one cam slid onto and connected to the shaft. The cam has a recess for receiving the shaft. The recess has at least one radially inwardly directed projection wh... | 08/14/1990 |
| 4945635 | Method of manufacturing brazable pipes and heat exchanger A process for producing brazeable pipes particularly for use in heat exchangers, the process comprising preparing a brazing sheet which comprises a core sheet coated with a brazing substance at least on one surface, forming a bulged portion of a semi-circ... | 08/07/1990 |
| 4944089 | Mounting a press shell to a press roll for dewatering a web A press roll for a web includes a support body which is either stationary or rotatable and a press shell which is rotatable over the support body and against a mating roll. A respective shell support element or disc is disposed axially outward of both end... | 07/31/1990 |
| 4939920 | Monitoring device for roll bearings in rolling mills The monitoring device is constructed in such a way that the temperature measurement takes place directly at the bearing and there is no need for detaching connecting lines during changing of rolls. The main features of the monitoring device for roll beari... | 07/10/1990 |
| 4936002 | Method of modifying integral steam chest steam turbines A method of eliminating cracking between a steam turbine casing and a welded integral steam chest includes removing the integral steam chest from the steam turbine casing and replacing it with a separate and spaced apart steam chest having a plurality of ... | 06/26/1990 |
| 4922605 | Device for lining a peripheral tube of a steam generator A liner (12) substantially smaller than the thickness of the tube plate (2) is inserted into the tube (8) so that, while one of its ends is in a region of the tube (8) inside the tube plate (2) and away from the entry face (2a), the other end of the liner... | 05/08/1990 |
| 4920623 | Heatable glazing or calendering roll A heatable glazing or calendering roll has a roll body, peripheral bores in the roll body for the passage of a fluid heat carrier, a flange journal for each end of the roll body, supply and discharge conduits for the fluid heat carrier in at least one fla... | 05/01/1990 |
| 4918806 | Method for manufacturing a piston In a method for manufacturing a piston a metal piston is prepared which has a skirt tapered towards the bottom end to such an extent that a diameter of the metal piston becomes uniform after a heat treating step. The metal piston is heat treated in a gas ... | 04/24/1990 |
| 4918805 | Welding method for cylinder head repair A method for weld repair and rebuilding of worn and cracked diesel engine cylinder heads of the pot-type is used in railway locomotive diesel engines and the like. The method involves carefully controlled preheating, welding and cooling steps.... | 04/24/1990 |
| 4914795 | Mill roll with a deformable casing A mill roll with a deformable casing comprises a tubular casing (1), a fixed support (2) and a set of elements (3) for holding the casing in the radial directions. At least one chamber (9) fed with high-pressure fluid is formed between the fixed support (... | 04/10/1990 |
| 4912956 | Process and apparatus for rolling a metal sheet or strip A process and apparatus for rolling a metal product (5) in a "four-high" type rolling mill comprising two work rolls (1) and (2) interposed between two backup rolls (3) (4) at least one of which is of the variable camber type having a cylindrical casing (... | 04/03/1990 |
| 4910866 | Method of manufacturing a series of leadframe strip carriers having fixed external dimensions and varied internal dimensions using a common mold A method of manufacturing a series of leadframe strip carriers, the individual members of the series having common external dimensions to facilitate production handling equipment setup and internal slot dimensions which vary to accommodate the various wid... | 03/27/1990 |
| 4910846 | Method of adjusting the axial play between a journalled shaft and a surrounding bearing casing A cylindrical roller bearing of the kind having a separate abutment ring at the inner bearing ring is used to provide intentional compensation of axial play between a journalled shaft and the surrounding bearing casing in a bearing combination which compr... | 03/27/1990 |
| 4910847 | Method of making a thrust bearing A cage and roller assembly in a hardened thrust bearing race is restrained within the race by heating a plurality of circumferentially widely separated parts of the race lip to soften the lip parts and bending the softened parts over the cage of the cage ... | 03/27/1990 |
| 4908923 | Method of dimensionally stabilizing interface between dissimilar metals in an internal combustion engine Method of dimensionally stabilizing the interface between metal parts of differing thermal expansion characteristics (TEC), regardless of temperature variations under normal designed use of such parts, comprising: (a) hot extruding a mixture of ceramic fi... | 03/20/1990 |
| 4907329 | Axial support device for a cylinder with rotating sleeve An axial support device for a cylinder with rotating sleeve comprising a fixed shaft (2) carried at each end (20) by a support member (3) in a fixed frame (1), a tubular cylindrical sleeve (4) and a series of aligned holding shoes (22), for adjustment of ... | 03/13/1990 |
| 4907323 | Method and apparatus for making biased fabric A method and apparatus is provided for producing a woven biased fabric in which the structural fibers are skewed from the fabric centerline. The method and apparatus are particularly designed for producing a woven biased structural fabric in which the str... | 03/13/1990 |
