Class 416/156 - Fluid motor

Subclass of Class 416 - Fluid reaction surfaces (i.e., impellers)
Definition: Apparatus wherein the motor is driven by fluid.
No. of patents: 32
Last issue date: 04/10/2012

Number	Title	Issue Date
8152470	Device for the adjustment of the pitch of a motor blade of a wind turbine A device is provided for the adjustment of the pitch of a rotor blade of a wind turbine. The device includes a pitch actuator and a fixing device. The pitch actuator includes a tube. The fixing device includes a first and a second ring-like element, each of which is...	04/10/2012
8105036	Device for the adjustment of the pitch of a rotor blade of a wind turbine A device is provided for the adjustment of the pitch of a rotor blade of a wind turbine comprising a pitch actuator acting on an adjusting plane for the adjustment of the pitch and a fixing device to which the pitch actuator is attached, the fixing device comprises ...	01/31/2012
7874801	Device for measuring the displacement travel of a hydraulic displacement mechanism A device for measuring the displacement travel of a hydraulic displacement mechanism for blades of an impeller of an axial-flow fan, wherein the displacement mechanism includes as components a displacement cylinder and a piston rod having a piston, one of the compon...	01/25/2011
RE41326	Reinforced hub for the rotor of a wind energy turbine The hub for the rotor (22) of a wind energy turbine (10) comprises a hollow body (28) rotatable around a rotation axis and provided with at least one flange (34) for mounting to the hollow body (28) a bearing for a rotor blade (...	05/11/2010
7365447	Horizontal axis wind turbine Disclosed is a horizontal axis wind turbine of an downwind type having a rotor disposed downwind of a tower, comprising: a rotor having a hub and a blade; a nacelle to support the rotor rotatably through a main shaft connected to the hub; a cylindrical tower support...	04/29/2008
7355294	Method and system for wind turbine blade movement This document discusses, among other things, a wind turbine blade pitch system for moving the blades to control their pitch in the event of a power failure. The system includes at least one backup that has a non-electrical component that can pitch the blades in the ...	04/08/2008
7342323	System and method for upwind speed based control of a wind turbine A method for controlling power output of a wind turbine generator in response to an anticipated change in wind speed is provided. The method includes sensing wind speed at a desired distance from the wind turbine generator in a direction of the wind. The method furt...	03/11/2008
7244102	Reinforced hub for the rotor of a wind energy turbine The hub for the rotor (22) of a wind energy turbine (10) comprises a hollow body (28) rotatable around a rotation axis and provided with at least one flange (34) for mounting to the hollow body (28) a bearing for a rotor blade (...	07/17/2007
7179054	Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio...	02/20/2007
7063125	Fan penetration feature for in-vehicle testing A fan penetration fixture consisting of a threaded shaft and a lock nut design. The fixture is designed to take the place of the fan clutch on a fan drive assembly in the vehicle being tested for a desired cooling system performance characteristic at each possible f...	06/20/2006
6940186	Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at...	09/06/2005
6729844	Controller for variable pitch fan system An electronic control device for opening and closing valves in a valve assembly that actuates a variable pitch fan system capable of operating in a plurality of fan blade pitch positions including a temperature switch actuated in response to a temperature condition ...	05/04/2004
6644922	Variable pitch fan A variable pitch fan in which the pitch of the fan blades is varied under control of a controller according to the speed of the fan. The controller is programmed to respond to increased fan speed by decreasing pitch of the fan blades. The variable pitch f...	11/11/2003
6604907	Individual blade adjustment for wind turbines An individual blade adjustment system for wind turbines comprising two drive units which are joined to at least one movable rocker arm, substantially in the cutting plane of the blade connection and which forms a lever mechanism together with the rocker a...	08/12/2003
6398496	Minimizing wind forces on helicopter blades Helicopter blades each have a piston connected to it. The pistons are movable within a cylinder between innermost and outermost positions. The hydraulic fluid of each cylinder is connected to other cylinders by a hydraulic tube or through a manifold. A dr...	06/04/2002
6241473	Pressure relief device for a propeller hub A pressure relief device for preventing over pressurization of a propeller hub is disclosed. The pressure relief device is designed to fit within a ball hole opening in the hub arm of the hub. The pressure relief device includes a housing which sealably i...	06/05/2001
6065935	Cycloidal propeller having blades which may be set into a sailing position The invention provides for a cycloidal propeller, in strictly rudder operation, accessory apparatuses that mesh with a gear drive connected to a shaft of the respective wing. The invention accomplishes relatively small actuation movements of the accessory...	05/23/2000
5993157	Cycloidal propeller having wings operated by hydraulic clutches A cycloidal propeller to achieve strictly a rudder operation includes accessory apparatuses containing accessory drives. Clutches are used to couple the accessory drives to the propeller shafts, and additional clutches are provided to disengage the fixed ...	11/30/1999
5584655	Rotor device and control for wind turbine A wine turbine with blades having a high lift-to-drag ratio is provided. A hydraulic or other control system is used to control cone angle, such as in response to flap moment. Pitch of blades is controlled, such as in relation to the blade flap angle. Tee...	12/17/1996
5324164	Fluid active device A multiple vane, variable pitch, fluid active or reactive device to move or be moved by a fluid including first and second wheels each rotatable about its axis and the axes disposed in selected parallel offset relation. Aperatures provided in the first wh...	06/28/1994
5281095	Variable-pitch mechanism for a propeller A variable-pitch mechanism, for use in an airplane, a ship, or the like, for adjusting the pitch of a plurality of blades of a propeller in which attachment shafts of a plurality of radial blades of a propeller are rotatably mounted on a tubular hub which...	01/25/1994
5213471	Propeller pitch control The invention concerns a system for controlling an aircraft propeller. A hydraulic motor controls pitch of the propeller blades. The propeller blades are characterized by the absence of feather-inducing counterweights. An overspeed governor senses when pr...	05/25/1993
5122036	Ram air turbine with power controller and method of operation An improved RAM air turbine (30) for the generation of emergency power on an airplane is disclosed. The RAM air turbine has an operational range in which reduced power is produced by a power controller (40) at speeds at which stalling of the RAM air turbi...	06/16/1992
5090869	Variable pitch propeller module for an aero gas turbine engine powerplant A variable pitch propeller module includes first and second multi-bladed propellers arranged to be driven in opposite rotational directions by a reduction gear mechanism, via shafts. First and second drums are rotatably mounted on the hubs of the first an...	02/25/1992
5011373	Individual pitch control device for blades of rotors of rotor craft by means of rotating linear jacks An individual pitch control device for the blades (7) of a rotor of a rotor craft employing respective rotating linear jacks (29) for controlling the pitch of the rotor blades. The linear jacks are implanted in a rotating support (25) which is driven in r...	04/30/1991
4952083	Controllable pitch propeller assembly A controllable and variable pitch propeller assembly. This assembly includes a main drive shaft mounted for rotation, and a propeller hub connected to the drive shaft for rotation with the drive shaft. Power cylinders are formed integrally in a unitary cy...	08/28/1990
4792281	Wind turbine pitch control hub In a variable pitch wind turbine system, pitch angle is determined by a pneumatically pressurized hydraulic actuator connected between crank arms on the blade pitch axles. The hydraulic line extends coaxially through the rotor drive shaft via a rotary uni...	12/20/1988
4749335	Rotary joint A rotary joint having a non rotary housing surrounding a rotating shaft and being sealed by a mechanical seal. Monitoring impulses are transmitted by hydraulic fluid which is transported between the housing and the shaft by means of a distribution socket....	06/07/1988
4465431	Overload protection apparatus for variable pitch propellers Disclosed is an overload protection apparatus for variable pitch propellers, particularly cycloidal propellers. The apparatus is of the kind having a hydraulic servomotor (2) with an adjustment rod (1) for actuating a propeller, and having mechanical rest...	08/14/1984
4392832	Steering and propulsion system for marine use A universal steering and propulsion unit for marine craft utilizes a power train which includes a differential gearing unit with control of the power delivered being accomplished through selective braking of one side of the differential. Steering may be a...	07/12/1983
4229141	Devices for operating variable-pitch propellers A propeller includes a hub having mounted on the central end part thereof a rotating fitting which permits the passage therethrough of a fluid circulating within two conduits which pass longitudinally of the fitting. The fluid operates on opposite ends of...	10/21/1980
3976265	Semibuoyant composite aircraft Various modifications are disclosed of the composite aircraft, which is the subject of U.S. Pat. No. 3,856,236 by this same inventor. The control console is supported from the center of the upper rotating balloon sphere instead of its south pole to reduce...	08/24/1976

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Class 416/156 - Fluid motor