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| Number | Title | Issue Date |
| 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 |
| 7121368 | Bi-directional automotive cooling fan The instant invention pertains to a road vehicle's axial flow cooling fan which normally draws cooling air from in front of the vehicle and blows it into the engine bay. The instant invention includes a control circuit for the fan motor that provides variable speed ... | 10/17/2006 |
| 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 |
| 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 |
| 6935841 | Fan assembly A fan assembly includes a vertical axis wind turbine (VAWT) which is coupled to an air extraction or air supply fan. The VAWT is located above and is coupled coaxially to the fan. The fan assembly also includes an auxiliary turbine to provide start-up torque to init... | 08/30/2005 |
| 6514044 | Offset crowned roller assembly for variable pitch propellers The expense of a bearing employed at the interface of a yoke (22) and a propeller blade pin (14) in a variable pitch propeller assembly is reduced in a bearing construction (16) wherein a bearing race (48) includes a crowned surface (50) adapted to engage... | 02/04/2003 |
| 6364610 | Manually adjustable variable-pitch boat propeller A variable-pitch boat propeller has a hub rotatable about a hub axis, a plurality of vanes rotatable on the hub and extending generally radially of the hub axis, and an adjustment element rotatable on the hub about the hub axis and connected to the vanes ... | 04/02/2002 |
| 6142735 | Variable-pitch propeller, especially for sport craft A variable-pitch propeller, especially for a sport board, has angularly displaceable blade support plates which can be rotated about respective radial axes. The plates are provided with radially inwardly directed claws which engage in circumferential groo... | 11/07/2000 |
| 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 |
| 6071076 | Actuation system for a gas turbine rotor blade An actuation system which includes apparatus for transferring control signals for varying the blade pitch from a non-rotating member to a rotating member of a gas turbine engine is described. In one embodiment, the engine includes a main disk containing a... | 06/06/2000 |
| 6042337 | Sealing system for a hydraulic machine A Kaplan turbine or similar hydraulic machine has a hub body (1) fixed to the turbine shaft with radial blades attached to the hub body. The blades are fitted with oil lubricated bearings in the hub body. A sealing arrangement for the oil system has first... | 03/28/2000 |
| 6042333 | Adjustable pitch impeller An impeller has a plurality of rotating passageways which can be defined between adjacent blades, the blades having a curved root portion and able to pivot across a part spherical hub to maintain a fine line contact. The passageways have a convergence to ... | 03/28/2000 |
| 5967753 | Controllable-pitch propeller, especially for sport boats and other watercraft A controllable-pitch propeller for a sport-type watercraft has a push rod eccentrically connected to each blade displaceable in a bore of the propeller hub. The push rod is sealed with respect to the end of that bore by a multifold bellows whose radial fl... | 10/19/1999 |
| 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 |
| 5931637 | Propeller with variable rate of pitch change A propeller is controlled to change pitch at at least two different rates. In one embodiment, an electric motor is provided with a high or low voltage for driving a pitch change mechanism at a high or low change rate. Preferably the rate is selected autom... | 08/03/1999 |
| 5498135 | Actuator for a variable pitch propeller An actuator for varying the pitch of a plurality of propeller blades mounted on a propeller blade hub comprising an electric motor driving a drive gear, a reduction gear set driven by the drive gear and driving an externally threaded drive spool, an inter... | 03/12/1996 |
| 5464324 | Variable-pitch propeller or fan A variable-pitch propeller or fan comprises a hollow boss, a number of propeller blades fitted rotatably on the boss, and also an adjusting element which is axially slidable in the boss and has a number of grooves running essentially at right angles to th... | 11/07/1995 |
| 5368442 | Automatic variable discrete pitch marine propeller A self-actuating variable pitch marine propeller which incorporates two or more blades which are rotatably connected to a central hub; the blades rotate relative to the hub center about the shank axis. In operation, the blades are biassed towards the lowe... | 11/29/1994 |
| 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 |
| 5240374 | Damped automatic variable pitch marine propeller There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a second higher pitch. The blades are preferably mechanically ... | 08/31/1993 |
| 5159620 | Variable pitch propeller apparatus The invention relates to a propeller assembly, particularly suitable for use with axial flow pumps. The propeller assembly is provided with a cam-operated rotatable propeller blade compression shaft which rotates in response to a detected increase load on... | 10/27/1992 |
| 5145318 | Flange-mounted controllable pitch marine propeller A controllable pitch marine propeller includes a hub body having a forward section provided with holes for bolts and locating and torque pins and a frontal surface that mates with a hub flange and an internal flange that defines an annular cavity and rece... | 09/08/1992 |
| 5129785 | Automatic variable discrete pitch marine propeller A self-actuating variable pitch marine propeller which incorporates two or more blades having cylindrical shafts which are rotatably connected to a central hub via cylindrical joints; the blades rotate about and translate radially, relative to the hub cen... | 07/14/1992 |
| 5122034 | Variable pitch fan A fan assembly has variable pitch blades adjustable from outside the assembly while the fan is operating so as to alter the volume and direction of the induced airflow. The fan blades have an airfoil configuration such that air is moved by the fan in eith... | 06/16/1992 |
| 5022820 | Variable pitch propeller An automatic variable pitch propeller including a central hub defining an axis of propeller rotation and a plurality of blades connected to and extending from the central hub substantially normal to the axis of rotation, each blade being mounted for rotat... | 06/11/1991 |
| 5022821 | Variable pitch fan A fan assembly has variable pitch blades adjustable from outside the assembly while the fan is operating so as to alter the volume and direction of the induced airflow. The fan blades have an airfoil configuration such that air is moved by a fan in either... | 06/11/1991 |
| 4880402 | Method and apparatus for preventing the attachment of foreign bodies to controllable pitch propeller linkages of watercraft A watercraft has a rotatable propeller drive shaft connected to a driving engine. A coupling is slidably disposed along the shaft. The coupling has a rotatable first section secured to the shaft and a non-rotatable second section spaced from the shaft wit... | 11/14/1989 |
| 4810166 | Controllable pitch marine propeller A controllable pitch marine propeller comprises a hub body carrying a plurality of propeller blades for rotation about pivot axes disposed radially of the hub axis, a force rod extending into the hub body from the propeller shaft, and a cross-head affixed... | 03/07/1989 |
| 4792279 | Variable pitch propeller An automatic variable pitch propeller comprising a central hub defining an axis of propeller rotation and a plurality of blades connected to and extending from said central hub substantially normal to the axis of rotation, each blade being mounted for rot... | 12/20/1988 |
| 4778344 | Variable pitch mechanisms A variable pitch mechanism for a propeller comprises a crank pin on each rotatable blade of a propeller, or fan impeller, rotatable about a longitudinal axis thereof, a translational member having a crank pin engagement element for each crank pin, an actu... | 10/18/1988 |
| 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 |
| 4744727 | Controllable pitch propeller and watercraft drive A controllable pitch propeller assembly has an inner housing attached to a main drive shaft, the housing having rails on the outer surface thereof. Modules carrying the propeller blades are positively mounted on the rails, each module having a housing rec... | 05/17/1988 |
| 4741672 | Collective pitch change system for teter-bar type gyroplane rotary wing aircraft A collective pitch change system for gyroplane rotary wing aircraft is provided. The system is particularly adapted for teter-bar rotors and is simple and direct. The system can change the blade pitch while the rotor is rotating to permit jump take-offs.... | 05/03/1988 |
| 4730795 | Heliplane The basic characteristics of an airplane and of a helicopter are combined into one flying craft: a HELIPLANE. This aircraft can fly forward like an airplane and hover like a helicopter. In the hovering mode, the craft lifting force is generated by gyratin... | 03/15/1988 |
| 4704067 | Helicoidal propeller pitch control mechanism A pitch control mechanism for propellers uses an elongated flat strip twisted into a helicoidal. The helicoidal is longitudinally slidable within a hollow propeller shaft. A cup-shaped cylindrical control ring coaxially mounted with respect to the front t... | 11/03/1987 |
| 4668168 | Lubricating and cooling rotary bearings of axial blowers In an axial blower, a plurality of blades are disposed around a hub and each blade is supported on a respective strut which is rotatable in a pair of radially separated bearings. An axially displaceable disk in the hub is connected with the blades for rot... | 05/26/1987 |
| 4662819 | Centrifugal fan with variable blade pitch A centrifugal fan includes a fan wheel having airfoil blades mounted for pivotal movement about their center of gravity. A yoke mechanism exterior of the fan wheel, when moved axially of the fan wheel drive shaft axis, causes actuator rods to move through... | 05/05/1987 |
| 4630999 | Axial fan An axial flow fan with adjustable blades 18 has a spindle 16 for each blade mounted in a hub rim 12. Each spindle has associated therewith a replaceable cartridge 58 having a thrust bearing 70 therein and spaced radial bearings 64, 70. In order to service... | 12/23/1986 |
