Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7338268 | Discharge valve device of a compressor A compressor includes a casing, a driving part adapted to be accommodated in the casing for generating a driving force, a compression part for compressing gas with the driving force from the driving part and provided with an inlet for inhaling the gas and an outlet ... | 03/04/2008 |
| 7226279 | Gerotor mechanism for a screw hydraulic machine The invention relates to gerotor mechanisms for screw downhole motors used for drilling oil and gas wells, to screw pumps for producing oil and pumping fluids and to general purpose screw motors. The profiles of a rotor (3) and stator (1) are outlined ... | 06/05/2007 |
| 6827564 | Rotary compressor A rotary piston displacement device having an impeller housng with an approximately cylindrical receiving chamber in which an approximately cylindrical piston, which has a smaller outside diameter than and which is mounted eccentrically relative to, the receiving ch... | 12/07/2004 |
| 6619938 | Flexible vane pump A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming... | 09/16/2003 |
| 6527525 | Hydristor control means A variable pump or motor is providing including a housing with inlet and outlet ports and a vaned rotor. Spool ends are provided at either end of the rotor thereby enhancing the effective sealing of the pump and its overall efficiency. Piston actuators ar... | 03/04/2003 |
| 6264450 | Flexible vane pump A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming... | 07/24/2001 |
| 6213740 | Flexible impeller pump having a transparent safety cover A flexible impeller pump having a transparent safety cover. The pump includes a flexible impeller and a housing having a pump and cover. The pump end cover comprises a transparent safety cover which is capable of attachment to the housing. A transparent h... | 04/10/2001 |
| 6203302 | Rubber impeller pump A high pressure fluid forcing pump having a cavity adaptable for receiving an impeller assembly rotatable within the cavity of the pump. The impeller assembly includes an impeller engaged between first and second spaced apart bearing plates and having tip... | 03/20/2001 |
| 6022201 | Hydraulic vane pump with flexible band control A variable pump or motor is providing including a housing with inlet and outlet ports and a vaned rotor, the vanes being extensible against a shape controlled freely rotatable flexible band within the housing.... | 02/08/2000 |
| 5839889 | Infinitely variable vane-type hydraulic machine A hydraulic machine having a continuously variable displacement includes a vane rotor having a plurality of radial vanes thereon and a connection for a torque transmitting shaft driven by a prime mover such as an engine or an electric motor. A cam ring is... | 11/24/1998 |
| 5709540 | Rotary pump with single elastic vane A rotary pump having a stator (1) pierced with a housing (11) delimited by a cylindrical sidewall (110). A cylindrical rotor (2) located tangentially inside of the housing (11) off-center to an axis (X). The cylindrical rotor (2) is driven in rotation abo... | 01/20/1998 |
| 5609479 | Forced compression type pump A forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body shaft-supported on said pump case at an eccentric position relative to said pump case and a compressing and forcibly sending member movable in a radial d... | 03/11/1997 |
| 5456585 | Positive displacement fluid motor with flexible blades The fluid motor, e.g. a liquid meter, a mixing apparatus or a turbine, has a chamber (1) with a rotor having stiff blades (7) which at their outer ends are provided with plate formed wings (8) of elastomeric material. The wings (8) are by a thin, overlapp... | 10/10/1995 |
| 5389411 | Composite structure forming a wear surface A pre-stressed composite liner structure is provided for tribological syss typically associated a pump, engine, compressor or systems having bearings rotating within a journal. A hollowed ceramic core is concentrically wound with cladding material in the... | 02/14/1995 |
| 5163824 | Rubber-geared pump with shaftless gear A gear pump is described for pumping extremely low volumes of fluid at extremely low rates of flow. The pump includes a housing with a cavity therein and a pair of gears rotatable within said cavity. One of the gears is shafted and the other is shaftless,... | 11/17/1992 |
| 5163825 | Articulated vane fluid driven motor An articulated air vane air or hydraulic motor has a rotor core disposed coaxially in a cylindrical housing, with a plurality of articulating vanes that seat in axial sockets or slots in the rotor core. A crescent shaped insert defines a cam surface in th... | 11/17/1992 |
| 5139401 | Oscillatory pump with elastic divider An oscillatory fluid pump is provided with a horizontally disposed cylindrical chamber disposed above and in communication with a rectilinear chamber along the entire length of both chambers. An inverted Y-shaped elastic member is secured at the lower end... | 08/18/1992 |
| 4975031 | Rotary compressor with compliant impact surfaces Objectionable noise in a rotary compressor is reduced by placing cavities in the sliding vane and/or the rolling piston. The cavities are used to change the local compliance of surfaces which impact one another to generate the objectionable noise. The cha... | 12/04/1990 |
| 4938668 | Rotating piston machine A rotating piston machine has a casing 2 with a shaft 5 borne in the casing 2. In an annular space 1 there are arranged rotating elements which bear in sealing manner against the walls of the annular space 1. Each rotating element (3, 4) has four outwardl... | 07/03/1990 |
| 4883414 | Rotating piston compressor A rotating piston compressor includes a cylinder. A thin-walled radially resilient piston contacts the cylinder at a given location and has a circular cross section, a surface facing the cylinder and a surface facing away from the cylinder. A rotationally... | 11/28/1989 |
| 4846638 | Rotary fluid machine with pivoted vanes A rotary fluid machine comprising a housing, a drive disk, a drive shaft, inner and outer cylindrical assemblies, and a plurality of vanes. The drive disk is supported within the housing for rotation about a first axis, and the drive shaft is connected to... | 07/11/1989 |
| 4823745 | Conformable bladder engine This invention relates to an internal combustion engine comprising: a combustion chamber having at least one rigidly fixed inner wall surface and at least two movable inner wall surfaces reciprocally mounted and adapted to reciprocate from a first positio... | 04/25/1989 |
| 4820480 | Flexible conformable vanes made of carbonaceous materials An external combustion engine including a rotary motor equipped with non-sliding vanes but conformable to the shapes of the envelopes within which they are contained and forced to operate and a combustion member comprising a sleeve in which a piston is fr... | 04/11/1989 |
| 4781552 | High pressure hydraulic generator receiver for power transmission Hydraulic gear-driven rotary machine (pump or motor) in which the gears are free-floating with no supporting shaft or bearings. Their internal ducts rotate, providing a commutation with the stator ducts. This maintains the hydraulic equilibrium of the gea... | 11/01/1988 |
| 4764095 | Rotary slide compressor with thin-walled, deformable sleeve An apparatus, particularly for compressing and conveying fluids, comprising a rotor (1) and a thin-walled rotary sleeve (7) which is rotatably arranged eccentrically with respect to the axis (M1) of the rotor and which is in surface contact with the surfa... | 08/16/1988 |
| 4743182 | Rotating piston compressor with thin-walled radially-resilient piston A rotating piston compressor includes a cylinder having a first given diameter, a thin-walled, radially-resilient piston with a circular cross section and a second given diameter being disposed in the piston, a radial support for the piston in the form of... | 05/10/1988 |
| 4702205 | External combustion vane engine with conformable vanes An external combustion engine including a rotary motor equipped with non-sliding vanes but conformable to the shapes of the envelopes within which they are contained and forced to operate and a combustion member comprising a sleeve in which a piston is fr... | 10/27/1987 |
| 4601646 | Centrifugal positive displacement device A centrifugal positive displacement device is presented. It is believed that this is the first type device which has the advantages of both a centrifugal pump and a positive displacement pump without any substantial disadvantages. The device comprises a c... | 07/22/1986 |
| 4580957 | Rotary fluid-flow machine with thin-walled annular piston A machine, in particular a working machine for the compression and conveyance of fluids, comprises a cylinder (2) and a thin-walled annular piston (4) arranged eccentrically with respect to the cylinder (2), with the piston being in flat contact either in... | 04/08/1986 |
| 4464101 | Seizure-free, highly fluid tight and lightweight vane compressor In a vane compressor, a liner formed of iron or an alloy thereof is disposed along the endless camming inner peripheral surface of the cylinder forming part of the pump housing. The liner has at least one break extending thereacross and has its whole surf... | 08/07/1984 |
| 4456442 | Rotary expansible chamber device with eccentric rotor assembly including a flexible band A pump consisting in a rotor (3) realized like a housing, placed in an outer housing (2), inside the rotor a cylindrical element (6) coaxially connected thereto by means of an elastic band (23) forming lobate chambers (13,14) between the rotor and the cyl... | 06/26/1984 |
| 4315719 | Non-lubricated rotary pump with discharge through end heads A rotary fluid pump of a non-lubrication type having a pump cavity formed within a cylindrical stator housing and a pair of recessed end head assembles. A drive shaft is eccentrically journalled in the end heads with a rotor mounted thereon with vanes sli... | 02/16/1982 |
| 4278410 | Rotatable pneumatic gear motor having a deformable adjustable sealed chamber A pneumatic rotary motor comprising a body to which is secured a bracer bushing closed by a cover. A deformable bushing is freely housed within the bracer bushing and is interposed between the cover and the casing. The bushing has a bore and two opposed l... | 07/14/1981 |
| 4137024 | Rotor for rotary piston mechanism The improved rotor is for a rotary compressor or expansion engine of the type having a rotor supported for planetation in a multi-lobe housing cavity and comprises an endless band embracing the peripheral surface of the rotor, which band functions to cont... | 01/30/1979 |
| 4087215 | Gerotor gearset device A hydraulic device includes an internally toothed stator formed by a one-piece homogeneous body having a continuous inner wall defining a series of circumferentially spaced arcuate recesses each of which is dimensioned to receive a radially and circumfere... | 05/02/1978 |
| 4043714 | Seal grid assembly for rotary piston mechanism The improved seal grid assembly is for a rotary compressor or expansion engine of the type having a rotor supported for planetation in a multi-lobe housing cavity and comprises, in combination with a non-rotating seal at the juncture of the housing lobes,... | 08/23/1977 |
| 4028021 | Rotary trochoidal compressor with compressible sealing A rotary trochoidal compressor comprising a rotor mounted for planetary motion within a housing and in which the peripheral surface of the compressor rotor is substantially a hypotrochoid and the peripheral inner surface of the housing is the outer envelo... | 06/07/1977 |
| 4012182 | Machines for energy conversion A machine for energy conversion includes a working chamber defined by two relatively movable parts and provided with inlets and outlets for the working medium, both parts having members serving as pistons and abutments which sealingly engage with the wall... | 03/15/1977 |
| 3995977 | Vane pump housing An annular sleeve is radially deformed within a cylindrical bore to provide a housing for a pump having vanes slidable through slots in an eccentric rotor, the radially opposed edges of the vanes slidably contacting the inner surface of the sleeve.... | 12/07/1976 |
| 3994641 | Rotary positive fluid displacement machine A rotary positive fluid displacement machine wherein the radially reciprocable sealing vanes are hydraulically coupled to each other at their innermost ends for preventing the occurrence of compression opposition to radial retraction of the vanes and for ... | 11/30/1976 |
