Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7334546 | Cylinder liner A ductile repair cylinder liner for a diesel engine, the cylinder liner having an additional cooling groove with a parabolic varying cross-section machined into the outer surface of the cylinder liner immediately below the radially extending locating flange for the ... | 02/26/2008 |
| 7220327 | Kick-down drum material and method of manufacturing the same Disclosed is a material of a kick-down drum comprising fine ferrite and microdispersion spheroidized cementite for an automobile also disclosed is a method for manufacturing the kick-down drum material. The kick-down drum of this invention can greatly improve harden... | 05/22/2007 |
| 7146735 | Method of making a bearing ring for a large roller bearing A bearing ring for a large roller bearing is formed with at least one annular race which is hardened by heating by juxtaposing that race with an inductor across a spacing which is maintained during the heating and then quenching. The spacing is controlled selectivel... | 12/12/2006 |
| 6723020 | Planetary carrier and method of manufacture A planetary carrier supports pinion gears of a planetary gear set via pinion shafts. Each hole in which a pinion shaft is mounted has a shallow hardened wall surface that is hardened by very-high-frequency induction heating and quenching. Therefore, the durability o... | 04/20/2004 |
| 6685596 | Variator disc and a method of fabricating the same A blank for disc is heat treated for adjusting a surface hardness thereof to not less than Hv700. The blank has a spline hole thereof heated by high frequency heating while cooling a race thereof. Subsequently, the spline hole is subjected to slow cooling... | 02/03/2004 |
| 6648995 | Method of quenching workpiece with hole, assistive tool for use in quenching, and crankshaft A ferrite core partly covered with ceramics members is loaded into an oil hole defined in a pin, and high-frequency induction hardening is effected on the pin while the ferrite core is being held in position by copper wires. At the same time, a magnetic f... | 11/18/2003 |
| 6613164 | Method of forming a tubular blank into a structural component and die therefor A method of forming an elongated tubular blank into a tubular structural component having a predetermined outer configuration, the method comprising: providing a shape imparting shell formed from a low permeability, rigid material which includes an inner ... | 09/02/2003 |
| 6402862 | Method of hardening a bushing of a track chain A method of hardening a work piece having (i) an outer surface, (ii) an inner surface which defines a passageway extending through the work piece, and (iii) an end. The method includes the steps of (A) advancing the work piece through a first induction co... | 06/11/2002 |
| 6264768 | Method for strengthening of rolling element bearings by thermal-mechanical net shape finish forming technique A method and apparatus disclosed for cost-effective net shape precision ausform finishing the engagement surfaces of ball and roller bearings, for enhancing the surface strength and durability of bearing inner and outer races. The method consists of induc... | 07/24/2001 |
| 6048417 | Method and apparatus for heat treating a bushing Conventional methods for heat treating cylindrical components such as track bushings involve multiple steps. For example, many such methods consist of carburizing, cooling, induction-hardening, quenching, and tempering. The conventional methods have prove... | 04/11/2000 |
| 5727317 | Method of forming an outer ring of an axle bearing An outer ring of an axle bearing is heat-treated and a through hole can be formed quickly and reliably. The outer ring has raceways on its inner periphery along which rolling elements roll. A through hole for mounting an antilock brake sensor is formed in... | 03/17/1998 |
| 5488219 | Induction heating coil assembly and method for hardening inner surface of cylinder by using the same An induction heating coil for forming a hardened layer in the inner wall of an external cylindrical member to be heated is disclosed. On the inner wall of the conductive induction member, a plurality of recess portions are formed at predetermined spaces c... | 01/30/1996 |
| 4949758 | Thin-walled small-bore steel tube with case hardened internal surface The present invention relates to a process for hardening the interior surface of a long, thin-walled, small inside diameter, tubular member, such as a tube which would be used to form a downhole pump barrel. More particularly, it relates to a process invo... | 08/21/1990 |
| 4844752 | Process for making internally hardened tubes The present invention relates to a process for hardening the interior surface of a long, thin-walled, small inside diameter, tubular member, such as a tube which would be used to form a downhole pump barrel. More particularly, it relates to a process invo... | 07/04/1989 |
| 4652423 | Magnetic induced heating for ferritic metal annealing A nuclear reactor vessel has an electromagnet positioned within to generate the predetermined temperature for the vessel wall for a predetermined time to anneal the vessel.... | 03/24/1987 |
| 4531987 | Method for inductively heat treating workpiece bore walls A method and apparatus of quench hardening to a desired depth the full axial extent of the wall surface, or selected portions of the wall surface, of an axially extending bore in an elongated workpiece wherein the bore has a selected uniform cross-section... | 07/30/1985 |
| 4401485 | Method for inductively heating thin-walled elongated workpieces A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, ... | 08/30/1983 |
| 4375997 | Method of inductively heat treating a thin-walled workpiece to control distortion In a preferred embodiment a surface layer of a thin-walled, hollow, cylindrical steel body is hardened while controlling thermal distortion by first heating with an inductor and quenching in one direction over the surface and then repeating the process in... | 03/08/1983 |
