| Patent Number |
Title Of Patent |
Date Issued |
| 4770205 |
Bi-directional snub valve |
September 13, 1988 |
| A bi-directional snub valve provides two parallel fluid paths therethrough and means for restricting the fluid flow through each of the parallel paths to one preferred direction. A movable piston is provided with two land portions which selectively are movable into blocking association w |
| 4768991 |
Cylindrical low friction slip clutch |
September 6, 1988 |
| A slip clutch is provided with three rotatable members disposed in coaxial and concentric relationship with each other. A first rotatable member is provided with a groove in a first cylindrical surface and a second rotatable member is provided with a second groove in a second cylindrical |
| 4768634 |
Backdrive overload release clutch |
September 6, 1988 |
| A backdrive overload clutch mechanism which includes a rotatable drive member and a rotatable driven member mounted concentric with respect to the drive member. A pair of cooperating clutch jaws, including chamfered teeth, are provided with one jaw on each of the drive and driven members |
| 4768558 |
Multi-port valve assembly |
September 6, 1988 |
| A multi-port valve assembly for controlling the flow of fluid through a plurality of outlet ports. A valve housing defines a common inlet and a plurality of outlet ports. A valve member corresponds to each outlet port for controlling fluid flow through the respective port. Each valve mem |
| 4765196 |
Intermittent motion transmitting and timing system |
August 23, 1988 |
| An intermittent motion transmitting and timing system for actuating an uplock latch device or the like to provide for high speed, timed power transmission at maximum load requirements. An inverse geneva drive mechanism is coupled between a rotational input drive and a rotatable outpu |
| 4764699 |
Generator stator retention system |
August 16, 1988 |
| An oil-cooled generator (10) is provided having a housing (20) with a gas-filled interior and rotor (46,56) therein. A stator (44,58) associated with the rotor (46,56) is secured to a surrounding sleeve (70',70) by an interference fit and pins (72',72). A bolt (84',84) is secured in an |
| 4763859 |
Quick replaceable thermal control system |
August 16, 1988 |
| An environmental control system for affording quick attachment and disconnection of a thermal control unit with respect to an aircraft fuselage. The fuselage includes a compartment communicating with the exterior of the aircraft for receiving the temperature control unit. The control |
| 4763054 |
Level detector |
August 9, 1988 |
| A level detector includes first and second comparators each having two inputs and an output wherein the first comparator receives an input signal and a first reference signal at the two inputs thereof and develops a first comparison signal when the input signal level is greater than the |
| 4762146 |
Flow control valve |
August 9, 1988 |
| In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes pressure reduction chambers for reducing fluid pressure in an incremental manne |
| 4761866 |
Method of working in situ the end of a heat exchanger tube |
August 9, 1988 |
| This invention is directed to a method of working the free end of heat exchanger tubes, and particularly the formation of braze cups, with the heat exchanger tubes in situ relative to the heat exchanger core with the method including the step of utilizing centering tooling positioned abo |
| 4760964 |
Actuator system for jet nozzle flap |
August 2, 1988 |
| In order to enhance performance of an aircraft while at the same time utilizing redundant aircraft hydraulic power in an efficient manner, an actuator system for a nozzle flap of an aircraft engine is provided. The actuator system includes a power drive unit in operatively associated |
| 4760907 |
Variable lead differential travel limiting mechanism |
August 2, 1988 |
| An apparatus is provided for limiting the relative rotation between coaxial shafts, including a helical thread about one of the shafts, a nut having a follower received in the helical thread, a spline connection between the nut and other shaft, and means for limiting axial motion of the |
| 4759186 |
Self-powered rotary actuator utilizing rotation-generated centrifugal head |
July 26, 1988 |
| The hydraulic actuator (35) utilizes the centrifugal head developed in its pressure chambers (52,54) when the housing (44) rotates as a source of pressure. As actuator (35) rotates fluid exits outlet port (56) and passs through a servovalve (64) into chamber (54) to move vane (49) relati |
| 4756664 |
Scavenge oil system |
July 12, 1988 |
| The scavenge oil system disclosing the invention has a scavenge oil outlet located at the bottom of a blower housing whereby lubricating oil can flow thereto by gravity in most attitudinal positions of the housing. When the blower housing is in an attitude that a portion thereof, such as |
| 4756264 |
Noise damping system for torpedoes or the like |
July 12, 1988 |
| A noise damping system incorporating in the hull of an underwater torpedo or the like which includes a power plant having a boiler. An inner hull section includes hotwell passages about the boiler whereby subcooled liquid in the hotwell passages absorbs heat from the boiler. A noise |
| 4755736 |
Generator system with integral permanent magnet generator exciter |
July 5, 1988 |
| A generator system having self-build-up characteristics with an integral permanent magnet generator exciter. A rotor shaft is journalled in a housing. A main stator is secured within the housing, and a rotating field is magnetically coupled to the main stator and secured to the rotor sha |
| 4755398 |
Power source utilizing encapsulated lithium pellets and method of making such pellets |
July 5, 1988 |
| Encapsulated lithium including a shot shaped and sized body (10) of lithium metal encapsulated in a thin layer (12) of a predominantly fluorine substituted polyolefin based polymeric material, a method of making the same and a power plant utilizing the encapsulated lithium as fuel (FIG. |
| 4755197 |
Torque transmitting deaerating apparatus |
July 5, 1988 |
| A torque transmitting apparatus which includes a tubular drive shaft defining a deaeration chamber integral with the interior of the shaft. Aerated liquid is ducted into one axial end of the deaeration chamber and separated air and residual liquid are ducted from the opposite end of the |
| 4755154 |
Vibration isolating mount with snubbing means |
July 5, 1988 |
| Noise transmission problems in a torpedo or the like are avoided through the use of a vibration isolating mount 16 to mount various components to the hull 10. The mount 16 includes a generally vertical ring 60 having a vertical, axially facing surface 66 and mounting means 62 for mountin |
| 4753071 |
Self-powered rotating-cylinder type linear actuator utilizing rotation-generated centrifugal hea |
June 28, 1988 |
| Conventional piston-cylinder hydraulic actuators require external pressure sources. The hydraulic actuator disclosed utilizes the centrifugal head developed in its chambers. The piston (36) is attached to shaft extension (24) which is splined to the actuator cylinder (20). The cylinder ( |
| 4751988 |
Torque limiting and overtravel stop device |
June 21, 1988 |
| To provide a torque limiting and overtravel stop device for aircraft actuation systems, where the overtravel stop is lightweight, bi-directional, repeatable and on-jamming, and allows for many revolutions of rotation between each end stop, the device includes a drive shaft having an |
| 4751438 |
Brushless DC motor control |
June 14, 1988 |
| Unlike brush-type DC motors, a brushless permanent magnet DC motor has an impedance which is resistive at low rotational speeds and becomes increasingly inductive at higher speeds. Consequently, a control for a brushless permanent magnet DC motor must control both supply voltage and |
| 4751417 |
Method of increasing operating efficiency of electric machines |
June 14, 1988 |
| In order to improve the efficiency of electric machines, by reducing losses caused by eddy currents induced by high frequency fluxes, the outer surface of the rotor, including the rotor pole face, has a plurality of circumferential grooves. The grooves are provided in axially spaced |
| 4748337 |
Prime mover starting system and method |
May 31, 1988 |
| A starting system for starting a prime mover connected to a generator by a torque link includes an induction motor having a torque rating substantially equal to the minimum torque required to rotate the rotor of the generator from rest to a particular speed within a predetermined time |
| 4746859 |
Power and temperature independent magnetic position sensor for a rotor |
May 24, 1988 |
| In order to optimize the electrical performance in motors in terms of improved efficiency, power factor, and reduced current, a power and temperature magnetic position sensor for a rotor utilizes first and second magnetic sensing devices for accurately determining the angular position |
| 4745815 |
Non-jamming screw actuator system |
May 24, 1988 |
| A non-jamming ballscrew actuator system which includes an inner screw, an intermediate ballscrew internally threaded on the inner screw, and an outer ballscrew nut rotatably mounted about the ballscrew. An actuator is operatively associated with a load to be actuated and connected to the |
| 4745746 |
Power control for a hydrostatic transmission |
May 24, 1988 |
| The present invention is directed to a power control for an automatic transmission which consists of two valves, the first of which is a characteristic valve providing a pressure differential linearly proportional to an input speed signal provided by a prime mover driven fixed displa |
| 4743812 |
Boost/buck DC/DC converter |
May 10, 1988 |
| A bi-directional DC/DC converter includes a first switch coupled to a first input/output of the converter, a first input/output energy storage element coupled to the first input/output of the converter, a second input/output energy storage element coupled to a second input/output of the |
| 4743776 |
Starter-generator for engines |
May 10, 1988 |
| Inefficiencies in electrical starter-generator systems for turbine engines are avoided in a construction including a dynamoelectric machine 16 operable as a motor or as a generator and having a rotor 26, a hydraulic torque converter 70 including an impeller 80 connected to the rotor 26 a |
| 4743163 |
Ram air turbine control system |
May 10, 1988 |
| A blade pitch control mechanism for a ram air driven turbine blade mounted for rotation on a hub assembly having a central axis. A governor control member, including a seat, is mounted on a portion of the hub assembly for reciprocation along the central axis. A first spring acts on the g |
| 4742976 |
Ram air turbine and deployment mechanism |
May 10, 1988 |
| A ram air turbine and deployment mechanism has commonly had power-generating means in the form of either one, or both, of a hydraulic pump and electrical generator mounted at the end of a pivotal strut adjacent the ram air turbine. Relocation of the power-generating means can provide |
| 4740140 |
Pump having integral switch and bypass valve |
April 26, 1988 |
| To provide a filter bypass and indicator, in a pump having an inlet and an outlet with a filter therein, a bypass port is in communication with the outlet upstream of the filter. A bypass valve assembly is provided in the bypass port and is normally in a closed position to direct all flo |
| 4739795 |
Flow control valve |
April 26, 1988 |
| In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes a pressure reduction chamber for reducing fluid pressure in an incremental mann |
| 4739616 |
Summing pressure compensation control |
April 26, 1988 |
| A displacement control for a variable displacement hydraulic motor wherein the control is a summing pressure compensator control which is responsive to the pressures of a plurality of loads so that the average, weighted average, or total pressures of the loads can be sensed to generate a |
| 4739466 |
Regulated AC/DC converter |
April 19, 1988 |
| A regulated AC/DC converter includes a transformer having a primary winding which receives AC input power and a secondary winding, a rectifier coupled to the secondary winding for rectifying the output of same, a switching circuit coupled to the rectifier for developing trim voltage whic |
| 4736685 |
Noise suppression in torpedoes |
April 12, 1988 |
| Noise suppression is achieved in a closed Rankine cycle torpedo including a propulsor 36, a turbine 26 connected to the propulsor 36, the turbine 26 having an annular outlet 40. The regenerator 42 is disposed about the turbine outlet 40 and has a radially outwardly opening annular regene |
| 4736151 |
Bi-directional buck/boost DC/DC converter |
April 5, 1988 |
| A bi-directonal DC/DC converter includes a first power switch coupled to a first input/output of the converter, an energy storage element coupled to the first power switch, a second power switch coupled between the energy storage element and a second input/output of the converter and mea |
| 4734626 |
Double differential, electrically compensated constant speed drive |
March 29, 1988 |
| An electrically compensated constant speed drive (ECCSD) according to the present invention includes a pair of power transmission paths between the prime mover and a load wherein each power transmission path includes a mechanical differential having a first input coupled to the output of |
| 4734590 |
Integrated drive generator with common center line |
March 29, 1988 |
| An integrated drive generator system in which all of the main components of the system are mounted for operation about a single centerline. A housing mounts a drive input shaft. A differential is coupled to and arranged coaxially of the drive input shaft. A generator is coupled to the |
| 4732236 |
Dual impeller pump |
March 22, 1988 |
| A liquid scavenging pump system for scavenging oil or the like from a blower, an engine or the like. A casing is provided for housing the blower and defining an oil receiving cavity. A dual pump is mounted in the casing and has first and second pumps in communication with the casing cavi |
| 4732100 |
Actuation system for torpedo control surfaces |
March 22, 1988 |
| An interior actuation system for controlling an exterior control surface of a torpedo or the like which has an afterbody with radial inlet vanes defining inlet liquid passages to the propellers of the torpedo. A linear actuator is mounted in the afterbody. A bell crank is connected at on |
| 4730788 |
Reaction coupled, torque balanced geartrain |
March 15, 1988 |
| The present invention is a multipath power transmission for use in an aircraft nosewheel steering system. Two planetary gear sets, together providing the power to steer the nosewheel, have their ring gears externally meshed to balance the power delivered by each of the planetary gear |
| 4730243 |
EMI reduction circuit |
March 8, 1988 |
| Prior types of power conversion circuits for converting AC power into DC power have generated large amounts of undesirable electromagnetic interference (EMI) due to the rectification of the AC power. Such EMI has been reduced in the past by large and heavy filters which have undesirably |
| 4729727 |
Gear pump with groove in end wall beginning at outer periphery of pumping chamber and widening t |
March 8, 1988 |
| A gear pump which includes a pair of intermeshing gears. A housing defines a pumping chamber having peripheral walls surrounding and in sealing contact with the circumference of the gears between an inlet port and a discharge port. Bearing walls are adapted to engage adjacent side faces |
| 4728841 |
Dual permanent magnet generator construction |
March 1, 1988 |
| Difficulties in precisely and easily adjusting the relative position of two rotors, 72, 104, 206, 226 in a dual permanent magnet generator are avoided in a structure including first and second side by side armatures 92, 108, 218, 230 with the rotors 72, 104, 212, 226 journalled therewith |
| 4727332 |
Controllable limiter |
February 23, 1988 |
| A limiter for limiting an input signal includes a first clamping circuit for clamping the input signal at a first level so that the input signal cannot rise substantially above such first level, a second clamping circuit for clamping the input signal at a second level less than the f |
| 4725741 |
Drive circuit for fast switching of Darlington-connected transistors |
February 16, 1988 |
| Prior circuits for rapidly switching Darlington-connected transistors between on and off states have accomplished relatively fast switching by applying reverse base drive to the transistors to quickly sweep the excess carriers therefrom. However, such circuits have not accomplished the |
| 4723577 |
Thermal expansion reservoir |
February 9, 1988 |
| In order to accommodate expansion and contraction in a fuel system, even in the presence of extremes of temperature, while maintaining the fuel system pressure at ambient, a thermal expansion reservoir is provided. The thermal expansion reservoir includes a rigid housing having releasabl |
| 4722186 |
Dual pressure displacement control system |
February 2, 1988 |
| A dual pressure source, or selectively alternative high pressure source, control system for a variable displacement hydraulic unit servo mechanism wherein normal control of the unit is provided by the low pressure source, such as a transmission charge pump, and wherein a high pressure so |
| 4722044 |
Boom control system |
January 26, 1988 |
| Machines having a boom or arm pivotally disposed thereon wherein the length of the boom or arm and the angle thereof with respect to a reference plane are adjustable by means of actuators are well known. However, it is extremely difficult, if not impossible, to simultaneously control the |
