Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7314035 | Rotary vane engine and thermodynamic cycle A heat engine having a rotary vane compressor and a rotary vane turbine operates in a highly efficient thermodynamic cycle which includes a power expansion phase up to ambient pressure and a limited temperature constant volume combustion followed by a constant press... | 01/01/2008 |
| 7192264 | Hyrdraulic motor The invention relates to a hydraulic motor having an outer casing and eccentric means for rotating a power shaft by means of fluid through a pressure chamber arrangement. The eccentric means comprise an eccentric part formed in the power shaft, a first eccentric rin... | 03/20/2007 |
| 6749411 | Rotary vane hydraulic power device A rotary vane device for hydraulic transmission of mechanical energy with industrial scale measures of power and rotational velocity. The device offers high measures of both volumetric efficiency and rotational velocity and hence substantial measures of functional e... | 06/15/2004 |
| 6599113 | Independent vane rotary gas compressor A radial vane type machine intended for production of compressed gaseous and vaporous fluids with industrial scale measures of compression amplification and throughput. Fluid compression is accomplished by mechanical volume manipulation but without the us... | 07/29/2003 |
| 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 |
| 6024549 | Vane type rotary device A rotational mechanism which consists of a circular armature fitted with a plurality of radial vanes which rotates within a stationary, cylindrical, containment structure with a circular bore. The rotational armature is concentrically installed on a rotat... | 02/15/2000 |
| 5660540 | Vane guide apparatus of a rotary compressor A rotary compressor includes a stationary member composed of a plate member, and a downwardly projecting shaft defining a first axis. A roller is freely rotatably mounted on the shaft. A cylinder is rotatably mounted below the plate element with the rolle... | 08/26/1997 |
| 5235945 | Rotary engine system The power and compressor units of an internal combustion rotary engine system utilize a rotor assembly, concentrically mounted on a stationary distributor core member, for rotation about an axis eccentric to the central axis of a cylindrical cavity that p... | 08/17/1993 |
| 5030074 | Rotary machine with dynamic pressure bearing grooves on vane guide ring A rotary machine for handling a fluid includes a housing having a rotor chamber and a rotor rotatably mounted in the chamber. The rotor has a plurality of generally radially disposed vane slots, and a plurality of vanes are slidably mounted in the vane sl... | 07/09/1991 |
| 5011390 | Rotary vane machine having stopper engaging recess in vane means A rotary machine for handling a fluid includes a housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber. The rotor has a plurality of generally radially disposed vane slots and a plurality of vanes are slidably mounted in the va... | 04/30/1991 |
| 4998867 | Rotary machine having axial projections on vanes closer to outer edge A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 03/12/1991 |
| 4997353 | Vane pump with dynamic pressure bearing grooves on vane guide ring A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 03/05/1991 |
| 4958992 | Variable capacity swivelling vane pump Variable capacity swivelling vane pump, comprising a radially displaceable rotor (13) connecting eccentrically in a rotor cage (h) with guided vanes (15), which are rotatably supported in vane recesses (16) and on cage pins (14). The vanes (15) thus conve... | 09/25/1990 |
| 4947646 | Radial vane hydraulic machine There is provided a positive displacement hydraulic rotator unit capable of operating in either direction of rotation. The rotator unit comprises a housing defining a substantially cylindrical internal chamber centered about a first central axis, and a ro... | 08/14/1990 |
| 4917584 | Vane pump with annular aetainer limiting outward radial vane movement A vane pump in which between an end surface of a rotor and an inner surface of an end wall of a housing having the rotor supported in an eccentric state is interposed a retainer coaxial with the housing or a bearing, and the retainer or bearing is engaged... | 04/17/1990 |
| 4435138 | Rotary vane machine with rotating end sealing plates A tubular cylindrical housing encloses an eccentrically mounted rotor provided with radial slots receiving the inner ends of slideable vanes, the outer ends of which are connected to wiper bars which ride along the interior peripheral surface of the housi... | 03/06/1984 |
| 4362481 | Rotary vane machine with rings radially constraining the vanes Constraining rings are provided in a fluid displacement machine of the kind in which an eccentrically mounted rotor revolves within a hollow chamber and is equipped with radially displaceable vanes to contact the wall of the chamber and separate working s... | 12/07/1982 |
| 4247268 | Rotary vane machine with radial vane constraining members Constraining rings are provided in a fluid displacement machine of the kind in which an eccentrically mounted rotor revolves within a hollow chamber and is equipped with radially displaceable vanes to contact the wall of the chamber and separate working s... | 01/27/1981 |
| 4212603 | Rotary vane machine with cam follower retaining means A rotary machine includes a stator housing having an inner surface defining a stator chamber. The housing further defines inlet and outlet ports through the housing into the chamber. A substantially cylindrical rotor is rotatably mounted within the chambe... | 07/15/1980 |
| 4005951 | Rotary vane engine with orbiting inner and outer members An engine of the rotary or orbital type having a piston member mounted to move eccentrically within a housing with a plurality of vanes disposed between the piston member and the housing to form a number of chambers which vary in volume as a piston member... | 02/01/1977 |
| 3955540 | Rotary internal combustion engine A rotary internal combustion engine which includes a housing having a cylindrical inner peripheral wall surface, a hollow, cylindrical rotor rotatably shaft-mounted in the housing in eccentric relationship with respect to the housing, a cylindrical vane t... | 05/11/1976 |