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...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 |
| 7341438 | Scroll-type fluid machine including passage formed in movable scroll A fluid machine includes a stationary scroll member and a movable scroll member. A second tooth portion of the movable scroll member is arranged to be revolved with respect to a first tooth portion of the stationary scroll member and to form an operating chamber bet... | 03/11/2008 |
| 7338267 | Hinged paddle pump A rotary pump for fluids comprising a shaft to rotate about a longitudinal axis and a cylindrical rotor centrally secured to that shaft. A housing encasing the shaft and rotor includes, interior end walls adjacent to the rotor disks and an interior side wall. Fluid ... | 03/04/2008 |
| 7100566 | Operating method for a rotary engine and a rotary internal combustion engine The invention relates to propulsion engineering and particularly to internal-combustion engines. The problem solved by the present invention is improving fuel efficiency and ecological compatibility, as well as providing the ability to set advance ignition at higher... | 09/05/2006 |
| 7074023 | Scroll compressor A scroll compressor enabling decrease of a flow path loss in a communication groove extending from a suction port toward a suction chamber to decrease a loss of suction power is disclosed. In the scroll compressor, a movable scroll is provided so as to perform a swi... | 07/11/2006 |
| 7059233 | Tungsten-containing articles and methods for forming the same Tungsten-containing articles and manufacturing processes for tungsten-containing articles. The articles may include firearms projectiles, such as shot, shot slugs, bullets, big game bullets, lead-equivalent bullets, black powder bullets, etc.; radiation shields; and... | 06/13/2006 |
| 6905315 | Valve plate in an air compressor An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump ... | 06/14/2005 |
| 6746223 | Orbiting rotary compressor An orbiting rotary compressor assembly having a compression mechanism disposed in a housing and including relatively moving fixed and orbiting compression members including extending portions having surfaces engaged with each other and between which a compression ch... | 06/08/2004 |
| 6729864 | Rotary positive displacement machine A stator (1) has a circular cylindrical internal surface (3) delimiting an operating chamber. A rotor (4) is mounted so as to be rotatable about the axis (8) of the internal surface (3) and has a cylindrical external surface (11... | 05/04/2004 |
| 6575719 | Planetary rotary machine using apertures, volutes and continuous carbon fiber reinforced peek seals Apertures through each face of a planetary rotor, volutes for low loss delivery and collection of fluid to and from the working volumes of a planetary rotary pump, compressor, or turbine, and zero clearance seals by using continuous carbon fiber reinforce... | 06/10/2003 |
| 6485277 | Valve arrangement and pump for a gear system The invention relates to a valve arrangement with a pressure limiting valve and a flow regulator valve, which comprises a flow regulator piston, having at least one first hydraulic resistor, distinguished in that the flow regulator valve's (5) flow regula... | 11/26/2002 |
| 6352420 | Complex teeth-type gas compressor A compound teeth type gas compressor comprises a housing with an upper end cover and a lower end cover mounted on both sides of the housing for constituting a seal cavity, a pair of meshing gears rotatably accommodated in the cavity, each gear having two ... | 03/05/2002 |
| 6264444 | Scroll-type compressor having orbital rotating mechanism on the side of movable spiral wall A scroll-type compressor has a front housing, a stationary scroll, and a rear housing arranged in this order. A movable scroll is arranged in a space formed in the front housing and the stationary scroll and opposed to the stationary scroll so that the mo... | 07/24/2001 |
| 5823755 | Rotary compressor with discharge chamber pressure relief groove The annular piston of a rolling piston compressor coacts with a groove in valving action such that the groove serves as a supplemental discharge flow area but gas therein is prevented from constituting part of the suction flow. The groove may be in the mo... | 10/20/1998 |
| 5443374 | Motor driven fluid compressor A hermetic type scroll compressor includes a hermetically sealed compressor housing formed by first and second cup-shaped casings. A cylindrical housing portion is disposed between the first and second cup-shaped casings and has an annular inner block ext... | 08/22/1995 |
| 5314316 | Scroll apparatus with reduced inlet pressure drop A scroll type fluid machinery which is provided with: a first scroll and a second scroll which moves with respect to the first scroll, where the base of the first scroll is provided with suction bores perforating through the base from the rear surface the... | 05/24/1994 |
| 5286174 | Fluid compression device A fluid compressor including a sealed case having an oil bank in which oil is held, a cylinder arranged in the sealed case, a rotation body eccentrically arranged in the cylinder, a main shaft and a sub-shaft formed at each of axial end portions of the ro... | 02/15/1994 |
| 5242283 | Scroll type compressor with elongated discharge port An improved scroll type compressor having enlarged fixed and orbiting spiral element tips with parallel flat faces is disclosed. A discharge port for discharging compressed fluids is positioned in the fixed end plate. The discharge port is shaped to provi... | 09/07/1993 |
| 5152682 | Scroll type fluid machine with passageway for innermost working chamber A gas compressor comprises a fixed scroll member and a movable scroll member. A plurality of crescent working chambers are defined between the scroll members so that the volume of the working chambers varies when the scroll members are relatively moved. T... | 10/06/1992 |
| 5055017 | Mechanical pumps A mechanical pump having a pumping chamber within which is positioned a pair of intermeshing rotors, preferably of the claw type, with each rotor mounted for rotation on respective shafts and the first rotor being associated with an inlet to the pumping c... | 10/08/1991 |
| 5006052 | Orbital rotor compressor having an inlet passage in the rotor A compressor arrangement is provided with an eccentrically controlled slidable vane. The vane is movable to release excessive pressure build-up so as to eliminate requirements for a safety valve.... | 04/09/1991 |
| 4997352 | Rotary fluid compressor having a spiral blade with an enlarging section A fluid compressor includes a rotating body arranged in a cylinder to extend in the axial direction of the cylinder and eccentric thereto. A spiral groove is formed on the outer circumference of the rotating body, and a spiral blade is slidably fitted in ... | 03/05/1991 |
| 4990071 | Scroll type fluid apparatus having two orbiting end plates linked together A scroll type supercharger including first and second orbital spiral elements is disclosed. The supercharger includes a first orbiting scroll having a first orbiting end plate from which a first spiral element extends, and a second oribting end plate fixe... | 02/05/1991 |
| 4929159 | Variable-displacement rotary compressor A variable-displacement rotary compressor comprises a rotor with a vane and a side plate disposed to abut a side face of the rotor. The side plate has a suction port formed therein to open to both a working chamber abutment face thereof abutting to the ro... | 05/29/1990 |
| 4923376 | Moineau pump with rotating closed end outer member and nonrotating hollow inner member An arrangement for an improved Moineau pump, i.e., a progressing cavity pump with a helical gear pair, wherein the closed end outer gear rotates and orbits relative to a nonrotating hollow inner gear. A hollow inner gear comprising an internal chamber ext... | 05/08/1990 |
| 4780070 | Gear pump having multiple outputs A gear pump is disclosed which is adapted to produce a large number of independent output streams, and which includes a housing having a cylindrical opening, a toothed gear disposed coaxially within the cylindrical opening, and at least one pinion gear di... | 10/25/1988 |
| 4710110 | Fluid pump apparatus This is a compressor apparatus having a central cavity, a fluid inlet and a fluid outlet coupled to the cavity, a pair of impellers having hollow interiors positioned in the cavity between the inlet and the outlet, each impeller having a plurality of exer... | 12/01/1987 |
| 4674964 | Gear pump having multiple outputs A gear pump is disclosed which is adapted to produce a large number of independent output streams, and which includes a housing having a cylindrical opening, a toothed gear disposed coaxially within the cylindrical opening, and at least one pinion gear di... | 06/23/1987 |
| 4561836 | Rotary piston machine A rotary piston machine, in order to avoid losses due to compressed flows, has adjacent to a generating and/or sealing contact edge (21, 22) at least one recess (11a, 11e) and/or opening (12a, 12b) which extends beyond the contact curve (14a-14c) in at le... | 12/31/1985 |
| 4512302 | Rotary engine A rotary internal combustion engine having separately housed compression and power rotors, and wherein there is a pair of sealing rotors positioned adjacent to diametrically opposite peripheral edges of each rotor to form two sealed pressure chambers in e... | 04/23/1985 |
| 4490101 | Internally axed rotary piston engine An internally axed crankless piston engine wherein a piston rotor has at least one piston which moves through a circular annulus defined between a fixed inner casing and a fixed radially outer casing. A stopping piston is provided which defines the termin... | 12/25/1984 |
| 4417859 | Rotary displacement turbine engine with vacuum relief valve means An external combustion engine is disclosed of the type including two or more circular rotors rotatably supported, one of the rotors acting as a power rotor and rotating in tangential contact with the other sealing rotor. The power rotor is formed with a r... | 11/29/1983 |
| 4391580 | Liquid fuel supply system for an atomization burner nozzle A system for supplying fuel to an atomization fuel oil burner nozzle from a fuel pump at a rate less than that rated for the nozzle for burning of less fuel while achieving good combustion. The fuel is delivered to the nozzle at a pulsing frequency which ... | 07/05/1983 |
| 4345886 | Rotary compressor with vanes in the housing and suction through the rotor A rotary compressor for compressing fluid. A housing having a cylindrical internal cavity is provided with vanes and delivery ports. A rotor is rotatably mounted in the housing. The rotor has a portion for making a sealing contact with the inner periphera... | 08/24/1982 |
| 4342297 | Rotary internal combustion engine A rotary internal combustion engine comprising a cylinder in a stator sealed between parallel end plates, a power shaft concentric with the cylinder bore and journaled in bearings in the end walls, an annular eccentric rotor fitted onto the shaft, and an ... | 08/03/1982 |
| 4336007 | Worm type compressor with compressed fluid escape grooves A worm type compressor comprises a cylindrical worm provided with a plurality of spiral-like passages in its inner periphery for forming fluid sealing chambers, a rotor slidably disposed within the worm and provided with an internal fluid outlet opening f... | 06/22/1982 |
| 4297090 | Rotary expansion power unit with valve disc connected to crankshaft A rotary expansion power unit, such as a steam engine, which has a planetating rotor in a housing having an epitrochoidal cavity. In known engines, hot expansion fluid is directed through a hollow interior in the rotor and surrounds the rotor journal bear... | 10/27/1981 |
| 4255093 | Combined lift and metering pump A combined lift and metering pump includes a set of relatively rotating pump elements in the form of an outer gear and a eccentrically disposed inner gear fixed on a drive shaft. A regulator communicates through a control passage with a discharge chamber ... | 03/10/1981 |
| 4235572 | Rotary displacement pump with intake through a first sealing slide A rotary displacement pump comprising a casing including a cylindrical in surface defining a stator chamber with an inlet and an outlet connected thereto. A cylindrical displacement body is movably mounted within the stator chamber having an outer surfac... | 11/25/1980 |
| 4152100 | Rotary piston compressor having pistons rotating in the same direction In a rotary piston machine the main rotary piston makes sealing engagement with at least one end wall of the main rotor bore and at least one inlet port is provided in that end wall and is located within the compass of the cylindrical portion of the main ... | 05/01/1979 |
| 4083663 | Rotary engine with pistons and lenticular valves A rotary machine with lenticular pistons and valves usable for internal and external combustion engines, expansion motors and pumps. A flat central stator housing is provided with two lateral cover housings. A plurality of rotating elements enclose the in... | 04/11/1978 |
