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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 8075271 | Electrohydraulic propeller governor Proposed is a hydraulically controlled variable pitch propeller system for air, land or water craft, comprising an engine, an engine controller, a rotating propeller featuring at least two propeller blades (16), for the pitch control of which a propeller gove... | 12/13/2011 |
| 8061992 | Rigid hydraulic control shaft and a control system for varying the pitch of a propeller A rigid hydraulic control shaft for conveying a fluid from a hydraulic valve to a hydraulic chamber of a propeller comprises a main segment. The main segment has a hollow rigid outer tube and a solid rigid inner bar. The inner bar has an outer periphery and at least... | 11/22/2011 |
| 7758310 | Translational thrust system for a rotary wing aircraft A translational thrust system for a high speed rotary-wing aircraft includes a propeller system driven by a propeller gearbox, a hydraulic system, and a mechanical-hydraulic control system. The mechanical-hydraulic control system utilizes a hydraulic fluid which tra... | 07/20/2010 |
| 7197870 | Pressure/flow sensing stall recovery for a ram air turbine A stall recovery system for a ram air turbine (RAT) that supplements the operation of a volume fuse in the hydraulic system of the RAT by sensing a stall condition as the combination of low pressure at less than maximum flow and reducing RAT load torque after the se... | 04/03/2007 |
| 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 |
| 7172391 | Propeller actuation system An auxiliary tank is filled by a pitch control system, which enables the size of the auxiliary tank to be reduced. ... | 02/06/2007 |
| 7156707 | Marine propulsion system A marine propulsion system comprising a push rod (50) for adjusting the pitch of propeller blades (34). The push rod (50) has a screw-threaded bolt (60) engaged with a nut (78). The nut (78) carries a bevel gear (84) ... | 01/02/2007 |
| 7124662 | Reversible driving apparatus for PCU pumps An accessory driving apparatus for an aircraft system is connected to an accessory unit to be driven, such as a PCU pump. A gear set for transferring rotational power from the driving shaft to the driven shaft is provided for selective arrangement in first and secon... | 10/24/2006 |
| 7118336 | Pressurized oil supply for propeller engine system A system and method for providing pressurised oil during non-feathered in-flight shutdown conditions in a variable-pitch aircraft propeller engine. A secondary pump provides pressurised oil substantially independent of an engine main oil circuit. ... | 10/10/2006 |
| 7101237 | Propellor blade adjustment system for propulsion through fluid environments under changing conditions The stern end of a seawater hull has a rotor hub with propeller blades thereon. The rotor hub is rotated for propulsion of the hull by means of a propeller shaft extending through a sealed compartment within the hull. Such sealed compartment and an electrically powe... | 09/05/2006 |
| 7074010 | RAM air turbine over-speed protector using redundant yoke plate linear bearings An improved ram air turbine for generating emergency aeronautical supplemental power with a plurality of concentric or nested linear bearings for supporting a speed governor yoke plate on a speed governor shaft comprising a movable sleeve that supports the yoke plat... | 07/11/2006 |
| 6981844 | Cyclic actuation system for a controllable pitch propeller and a method of providing aircraft control therewith A propeller control generates a once per revolution (1P) blade thrust variation through cyclic pitch of rigidly mounted non-flapping propeller blades. The resultant shaft bending moment is used to provide aircraft attitude control. Axial translation of a pitch chang... | 01/03/2006 |
| 6953320 | Ventilation fan A ventilation fan assembly (10) having a fan (22) mounted in a housing (12) and a shutter assembly (60). The housing has a square inlet portion (12C), a circular center portion (12E) and a conical outlet portion (12D)... | 10/11/2005 |
| 6942458 | Variable pitch fan An improved variable pitch fan comprising a fan hub, with fan blades extending radially outward from the fan hub and mounted for rotation about respective radially extending axes corresponding to each fan blade. Each fan blade has a blade surface extending perpendic... | 09/13/2005 |
| 6767187 | Electrohydraulic device for varying the pitch of the blades of a machine rotor An electrohydraulic device for varying the pitch of the blades of a machine rotor, the blades being mounted on a hub rotated by a drive shaft of the machine, and each blade having a root capable of pivoting about a longitudinal axis of the blade, the drive shaft its... | 07/27/2004 |
| 6511292 | Backup governing system for a variable pitch propeller A backup governing system for a variable pitch propeller, carried by the propeller hub which is hydraulically interposed between a main control for the propeller and a propeller blade moving, double acting piston, the backup governing system comprising a ... | 01/28/2003 |
| 6478542 | Variable pitch propeller having centrifugal lock A variable pitch propeller has a centrifugal lock for blocking blade pitch changes from a normal range of forward pitch angles toward both feathered and reverse positions at rotational speeds greater than a predetermined threshold. The lock mechanism has ... | 11/12/2002 |
| 6425788 | Controllable-pitch propeller The invention relates to a propeller suited for installation in boats and vessels and having a run-time controllable pitch of propeller blades (4). The propeller comprises a hollow hub casing (2) containing a sleeve (10) adaptable about the propeller shaf... | 07/30/2002 |
| 6358007 | Universal constant speed variable pitch boat propeller system An adjustable pitch boat propeller system adapted for mounting on a drive shaft of a marine drive unit of a boat. The propeller includes an hub that has been adapted for mounting over the drive shaft of the boat, the hub having an external surface and int... | 03/19/2002 |
| 6340290 | Controllable pitch propeller with a fail safe increased pitch movement A controllable pitch propeller is provided with a blade that naturally tends to rotate in a direction toward maximum pitch as a result of the hydrodynamic forces on the blade. As a result, the blade will move toward a pitch position of increased pitch mag... | 01/22/2002 |
| 6287077 | Adjustable-pitch boat propeller A boat propeller has a housing adapted to be fixed to a boat, a hub rotatable about a main axis on the housing, a plurality of generally radially projecting vanes pivotable on the hub, and an operating core shaft coaxially received in the hub, rotatable a... | 09/11/2001 |
| 6196797 | Electronic self-powered propeller governor An electronic self-powered propeller governor driven off the aircraft engine includes a drive shaft which drives a hydraulic pump to produce pressurized oil to move a hydraulically controlled piston connected to the propeller blade for changing the blade ... | 03/06/2001 |
| 6190126 | Fan impeller assembly for cooling systems of internal combustion engines A fan impeller assembly of simple construction which is intended, in particular, for use in cooling systems of internal combustion engines and can be used there inter alia as a cleaning blower for clearing the radiator and/or corresponding air inlet openi... | 02/20/2001 |
| 6109871 | Integrated fan assembly with variable pitch blades A fan assembly (10) includes first and second housing sections (70, 72) which, when mated by a first set of fasteners, define a plurality of circumferentially spaced openings (162) that lead to an internal housing chamber (82). The fan assembly (10) also ... | 08/29/2000 |
| 6077040 | Control system for blades for a variable pitch propeller A system for controlling propeller blade pitch is disclosed. The system comprises a transfer tube, wherein the transfer tube defines an element of the rotatable portion and wherein the transfer tube is non-translating relative the rotatable and non-rotata... | 06/20/2000 |
| 6004098 | Propulsion unit for an aircraft and its control procedure An engine plant for aircraft comprising a multicylinder internal combustion engine (1) whose crankshaft drives an adjustable pitch propeller (5), mechanisms for adjusting the engine speed and a common power stick (4) that controls the operation of the eng... | 12/21/1999 |
| 5967750 | Variable pitch marine propeller A variable-pitch marine propeller system has a propeller unit for mounting on a drive shaft, and a power unit including a stationary annular hydraulic cylinder for operating the propeller unit, a hydraulic remote control unit being fluid-coupled to the po... | 10/19/1999 |
| 5897293 | Counterweighted propeller control system A system for controlling functions of a propeller having a plurality of blades is disclosed. The system comprises an electronic control for controlling the functions of the propeller. A plurality of backup devices are provided for backing up the electroni... | 04/27/1999 |
| 5836743 | Variable pitch counterweighted propeller system with releasable hydraulic pitchlock The hydraulic propeller system of the present invention has a central hub including a stationary portion and a rotatable portion. A plurality of propeller blades are connected with the rotatable portion, wherein each of the plurality of propeller blades h... | 11/17/1998 |
| 5762474 | Variable-pitch propeller assembly enabling pitch reversal during operation A propeller unit, each blade (1) being fixed to a blade foot (2) rendered integral with a hub (3) rotating around an axis but mobile with respect to the hub on translation in the direction of the axis and rotating around a second axis orthogonal to the fi... | 06/09/1998 |
| 5470204 | Hydraulic adjustment device The invention relates to a turbo-engine with a hydraulic device for adjusting the blades of a variable-pitch propeller. A hydraulic pump for hydraulically adjusting the blades of the variable-pitch propeller is disposed within a chamber through which pass... | 11/28/1995 |
| 5466121 | Hydraulic adjustment device A hydraulic adjustment device for variable-pitch propellers of turbo-engines comprise a shaft for driving the variable-pitch propeller. A plurality of transmission elements for feeding and draining, as well as for guiding a hydraulic fluid is disposed in ... | 11/14/1995 |
| 5431539 | Propeller pitch change mechanism The pitch change mechanism for a variable pitch propeller blade or Advanced Ducted Propulsor (ADP) interconnecting the pitch change actuator and the propeller blades of the type that includes a trunnion attached to the root of the propeller blade, the con... | 07/11/1995 |
| 5415523 | Control system for variable-pitch boat propeller A marine drive has a propeller rotatable about a drive axis and having a plurality of blades themselves pivotable about respective blade axes projecting generally radially from the drive axis and each movable between a low-pitch end position extending gen... | 05/16/1995 |
| 5391055 | Propeller pitch change mechanism with impulse turbines The pitch of either a fan or propeller driven by a gas turbine engine is changed by utilizing a pair of impulse turbines interfacing between the stationary and rotating portion of the fan or propeller and utilizing a servo control responding to a desired ... | 02/21/1995 |
| 5364231 | Full authority propeller pitch control A control for a hydraulic propeller pitch actuator includes a low power pilot valve responsive to digital electronic input signals to control movement of a hydraulic servomotor driving a higher power servovalve. Negative feedback motion is delivered from ... | 11/15/1994 |
| 5213472 | Inboard servo for marine controllable pitch propellers An inboard servo for a controllable pitch propeller of the force rod type comprises a feedback device comprising a feedback ring located externally of the propeller drive shaft, affixed to the force rod for rotation and axial translation therewith and hav... | 05/25/1993 |
| 5186608 | Hydraulic low pitch switch for propeller pitch change system A low pitch alarm assembly 70 comprises a capped sleeve 72 disposed about the distal end 55 of the rotating and translating fluid delivery tube 50 so as to define a chamber 75 receiving the end 55 of the fluid delivery tube for axial translation therein, ... | 02/16/1993 |
| 5174718 | Blade pitch change control system A pitch change actuation system is disclosed for adjusting the pitch of a variable pitch propeller blades (120) operatively connected for pitch change to a pitch change actuator piston (140). A pitch change control system (10) is operatively connected to ... | 12/29/1992 |
| 5161948 | Propulsor pitchlock and feather stop A pitch change actuation system for changing the pitch of the blades (16) of a prop-fan propulsor (10) comprises a translating pitch change actuator (30) and a flexible feather latch member (50) including a feather stop (56) and a feather latch (58), the ... | 11/10/1992 |
