Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7360511 | Opposed piston engine A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a co... | 04/22/2008 |
| 7156056 | Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine with optimized cooling and no engine block, the opposed pistons are coupled to a pair of crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the cran... | 01/02/2007 |
| 6983680 | Long-piston hydraulic machines Smaller and lighter hydraulic pump/motors provide remarkably improved volumetric efficiency with pistons having body portions substantially as long as the axial length of the respective cylinders in which they reciprocate. A plurality of respective lubricating chann... | 01/10/2006 |
| 6527087 | Lubricating system for internal combustion engine To reduce the size and weight of an oil tank for a dry sump type lubricating system. A separate oil tank of a dry sump type lubricating system is mounted on the front surface of a front case cover constituting part of a crankcase divided into front and re... | 03/04/2003 |
| 6305420 | Head gasket with a check valve A head gasket which acts, when clamped between a head and a cylinder block of an internal combustion engine, to form a seal around at least one lubricant or hydraulic fluid passage which extends between the head and the block. The gasket also comprises a ... | 10/23/2001 |
| 5852992 | Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation pas... | 12/29/1998 |
| 5816134 | Compressor piston and piston type compressor A compressor has a piston (11) that reciprocates between a top dead center and a bottom dead center in a cylinder bore (2a) by means of a driving body (9) mounted on a rotary shaft (6) in a crank chamber (5) during the rotation of the rotary shaft (6). Th... | 10/06/1998 |
| 5806631 | Piston pin lubrication A number of embodiments of direct piston pin lubrication systems for reciprocating machines such as internal combustion engines. In all of the embodiments, the hollow interior of the piston pin is employed as a distribution passage with radial drillings e... | 09/15/1998 |
| 5797311 | Piston/liner arrangement for a reciprocating-piston internal combustion engine In a piston/liner arrangement for a reciprocating-piston internal combustion engine, wherein a piston with a skirt is axially movable in the liner, at least one of the piston skirt and the liner includes sections with an open-pore surface structure in whi... | 08/25/1998 |
| 5772406 | Piston-type compressor with a lubricating system A piston-type compressor is provided with a lubricating system for allowing passage of blowby gas from a piston chamber to a crank chamber, which is disposed opposite the piston from the piston chamber. A driving mechanism is disposed in the crank chamber... | 06/30/1998 |
| 5715911 | Laminar flow lubrication The system provides a lubricating fluid between a wall which defines a cavity and a member which passes through the cavity. The system includes a passageway for supplying lubricating fluid to the cavity at a velocity and a fluid outlet for introducing the... | 02/10/1998 |
| 5657833 | Self-contained unitized lubricant delivery apparatus Self-contained lubricant delivery apparatus for crushing unitized lubricant elements and delivering flowable lubricant from the crushed elements to lubricant requiring portions of a die casting machine. The apparatus includes a cylinder body defining a de... | 08/19/1997 |
| 5638921 | Die mounted unitized lubricant delivery apparatus Lubricant delivery apparatus for crushing unitized lubricant elements and delivering flowable lubricant from the crushed elements to a die casting machine die cavity. The apparatus includes a delivery cylinder on or in one die which opens with the dies fo... | 06/17/1997 |
| 5588505 | Cleaning attachment for internal tube mandrel An internal mandrel assembly is provided that includes a cleaning attachment for cleaning the interior surface of a tube during a bending operation. The internal mandrel assembly includes a mandrel shank, a plurality of mandrel ball assemblies pivotally c... | 12/31/1996 |
| 5433679 | Exercise treadmill and method An exercise treadmill is disclosed which includes means for lubricating the endless belt treadmill components. In each embodiment, a lubricant is applied to either the inner surface of the treadmill belt or to the treadmill support deck, thereby reducing ... | 07/18/1995 |
| 5339724 | Arrangement for the lubrication of the piston member of a fuel injection pump An improved lubrication arrangement for a piston member arranged to be reciprocatingly movable in a cylinder element of an injection pump for fuel or the like pressure medium, wherein lubricant is supplied under pressure into a lubrication groove arranged... | 08/23/1994 |
| 4993380 | Lubrication mechanism of engine cylinder A lubrication mechanism for an engine cylinder includes upper and lower ring troughs on the inside wall of the engine cylinder. The two ring troughs can accommodate oil pipes and ring oil nets. The oil pipes include an inlet pipe and an outlet pipe. Chann... | 02/19/1991 |
| 4936417 | Lubricating system which includes a splash cooling of the pistons of an internal-combustion engine A lubricating system is disclosed which includes a splash cooling of the pistons of an internal-combustion engine by spraying nozzles, the cooling jets of which are aimed at the interior surfaces of the pistons. In order to achieve, after the start of an ... | 06/26/1990 |
| 4895221 | Method and apparatus for installing a fish tape in a conduit A new method and apparatus for quickening in the insertion of a fish tape through a conduit by reducing the occurrence of frictional adhering. The apparatus provided in several embodiments uses flexible lubricant carrying materials having pressure sensiti... | 01/23/1990 |
| 4890534 | Lubricating die for cartridge reloader A die used in a reloading press for reloading spent cartridges. The wall of the die is provided with a reservoir for liquid lubricant. A lubricating pad is provided inside the die mouth and lubricant from the reservoir is channeled to the pad. A primary r... | 01/02/1990 |
| 4815718 | Self-lubricating die cylinder A self-lubricating die cylinder assembly is provided containing a cylinder, piston, expansion reservoir and working chamber. A lubricating oil recirculation means is provided to transport oil between the working chamber and the expansion reservoir during ... | 03/28/1989 |
| 4735287 | Lubricating system for a fuel-injection pump A fuel-injection pump with a rotational speed governor for an internal combustion engine which for purposes of lubrication is connected to the lubricating oil circulatory system of the internal combustion engine. The lubricating oil which is thereby remov... | 04/05/1988 |
| 4691902 | Self-lubricating die cylinder A self-lubricating die cylinder assembly is provided containing a cylinder, piston, expansion reservoir and working chamber. A lubricating oil recirculation means is provided to transport oil between the working chamber and the expansion reservoir during ... | 09/08/1987 |
| 4688775 | Self-lubricating die cylinder A press cushion assembly includes a variable volume chamber which is expanded during operation of the press to an open condition and is contracted during operation of the press to a closed condition. During expansion of the variable volume chamber, a flow... | 08/25/1987 |
| 4651769 | Lubricated water valve A water valve with a hollow piston axially reciprocable in a cylindrical bore of a surrounding sleeve is provided, for long-term lubrication of the piston, with grease chambers formed as inwardly open peripheral recesses on the inner sleeve surfaces at op... | 03/24/1987 |
| 4557351 | Lubrication system for a walking beam compressor An improved lubrication system for lubricating the moving parts of a walking beam compressor used in compressing low pressure natural gas. The compressor is mounted on a walking beam oil pump. The lubrication system introduces oil through the length of a ... | 12/10/1985 |
| 4550805 | Hydrostatic lubrication system for a walking beam An improved lubrication system for the hydrostatic lubrication of an upper bearing and cylinder wall and piston of a walking beam compressor. The lubrication system introduces oil under pressure, around an upper bearing used for supporting a piston shaft ... | 11/05/1985 |
| 4550647 | Piston pin and piston, notably for an internal combustion engine, equipped with said pin The piston pin for a piston of an internal combustion engine is provided with a certain number of passages, each opening into the annular groove of the bearing bushing of the connecting-rod small end and into either of the annular grooves of the pin beari... | 11/05/1985 |
| 4499968 | Bore lubricator Lubricator for bores in members, the lubricator being particularly useful for the lubrication of bores of small diameter with a lubricant of high viscosity. The lubricator has an applicator in the form of an elongated composite plunger having an outer tub... | 02/19/1985 |
| 4389922 | Reversing low pressure lubricating valve A lubricating valve for a moveable piston, the valve supplying lubricant at low pressure and being reversible automatically in response to a reversal of the higher pressure which drives the piston.... | 06/28/1983 |
| 4342448 | Gas-operated cylinder A gas-operated piston cylinder assembly arranged between upper and lower die members of a press. The lower end of the cylinder communicates with a source of high pressure gas and also communicates through a passageway with the upper rod end of the cylinde... | 08/03/1982 |
| 4279517 | Mixing apparatus for chemically reacting fluid components, particularly polyurethane-forming components A mixing apparatus for mixing components that interact chemically, preferably polyurethane-forming components, the apparatus including a control plunger disposed within a housing and movable along a mixing chamber between opposing inlet and return ports, ... | 07/21/1981 |
| 4275096 | Method and apparatus for dispensing fluid in a conduit A method and apparatus for dispensing a fluid in a conduit and more particularly for dispensing lubricant within an electrical conduit for facilitating pulling electrical cables through the conduit. The apparatus is in the form of a cartridge disposed in ... | 06/23/1981 |
| 4199858 | Method for automatically lubricating pipe joint In a well treating process in which fluid is or will be conveyed to or from a subterranean reservoir through a pipe string containing threaded pipe joints, the avoidance of reservoir permeability impairment is improved by lubricating the pipe joint thread... | 04/29/1980 |
| 4186654 | Recirculating lubrication system Improved lubrication system for multiplex pumps including lubrication reservoir means, pump means, filtration means and valve means.... | 02/05/1980 |
| 4137015 | Energy conversion system using windmill A system for recovering the energy from atmospheric wind wherein a windmill operates a compressor for compressing air which is stored in one or more tanks. The compressed air is used to drive a prime mover coupled by gear means to an electrical generator ... | 01/30/1979 |
| 4044859 | Lubricating means for gas-operated cylinders In a fluid spring arrangement for a metal forming die assembly of the gas-operated, piston-cylinder type, the surfaces of the piston and cylinder which are in sliding contact are lubricated by lubricant entrained in the pressurized gas directed into the w... | 08/30/1977 |
