Quotables
"The horse is here to stay, the automobile is only a novelty - fad."
President of Michigan Savings Bank ; 1903
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5350614 | All composite article of manufacture including first and second composite members joined by a composite hinge An all-composite article comprising two composite parts pivotally joined by a composite hinge which is fabricated integrally therewith. The method of making such an all-composite article.... | 09/27/1994 |
| 5286167 | Spar-to-hub joint for a flexbeam helicopter rotor A flexbeam helicopter rotor having an improved connection between the flexbeam and the hub of the connecting pin variety but in which the high tensile fibers of the flexbeam do not wrap around the connecting pin, wherein the blade centrifugal loads and th... | 02/15/1994 |
| 5271986 | Structural member having a stiffener bead therein and comprising plies of composite material extending for the full length and width of the structural member and continuously through the stiffener bead, and the article so made A structural member made up of a plurality of bonded plies of high tensile strength woven fabric and molded to include at least one stiffener bead having elliptically shaped ends, and a structural part so fabricated.... | 12/21/1993 |
| 5158631 | Method of manufacturing a dog-leg shaped ply of composite material and the tool used in carrying out the method The method of fabricating selectively shaped dog-leg plies of composite material comprising unidirectionally extending high tensile strength fibers or filaments extending for the full length of the ply and embedded in a resin matrix comprising winding hig... | 10/27/1992 |
| 5156363 | Helicopter collective stick of the displacement type occupying a minimum space envelope yet whose grip generates an arc of large radius A helicopter collective control stick having a pilot grip positioned by a linkage assembly whose kinematics permits the control stick to occupy a small envelope and to have the pilot grip motion to be about a large radius. Our collective stick includes a ... | 10/20/1992 |
| 5152478 | Unmanned flight vehicle including counter rotating rotors positioned within a toroidal shroud and operable to provide all required vehicle flight controls An unmanned flight vehicle wherein two counter-rotating rotors are positioned within a toroidal fuselage and in which rotor pitch solely is utilized to generate all required lift, pitch, roll, yaw and vibration and stress control for the vehicle.... | 10/06/1992 |
| 5149013 | Retractable helicopter rotor A retractable helicopter rotor in which the rotor and its blades, the swashplate and the pitch change rods are retracted and extended as a unit during the helicopter rotor retraction/extension mode of operation, wherein the connection between the rotor su... | 09/22/1992 |
| 5111676 | Tool for selectively bending the trailing edge tab of a helicopter blade while simultaneously measuring the true degree of tab bending A tool mountable on a helicopter blade for selectively bending the trailing edge trim tab of the blade about a selected axis along the span of the trim tab, and including a device to counterbalance the weight of the trim tab bending mechanism so that the ... | 05/12/1992 |
| 5091029 | Method of manufacturing a unitary, multi-legged helicopter rotor flexbeam made solely of composite materials The method of manufacturing a multi-legged (preferably five) flexbeam for a hingeless flexbeam helicopter rotor, which flexbeam is of one-piece construction and made solely of composite materials, and includes full length plies of unidirectional high stre... | 02/25/1992 |
| 4550812 | Fixed position, fixed frequency pendular-type vibration absorber with frequency linearization A fixed frequency vibration absorber adapted to be fixedly mounted in a fixed vibration prone system. The vibration absorber is of the pendular-type with two dynamic masses suspended in pendular fashion from a base member, and with at least one coil sprin... | 11/05/1985 |
| 4470121 | Multi-frequency vibration controller using fluid-filled cantilever beam for vibration excitation & absorption A variable frequency vibration controller includes a cantilever beam supported from the vibration prone structure whose vibrations are to be controlled. The cantilever beam has selectively shaped hollow interior portions into which fluid can be selectivel... | 09/04/1984 |
| 4461611 | Helicopter rotor with blade trailing edge tabs responsive to control system loading A helicopter rotor having blade trailing edge tabs which are actuated in response to control rod loading to reduce or cancel the blade pitching moments imposed upon the blade and hence the control rods by blade aerodynamic and inertial loads, or other loa... | 07/24/1984 |
| 4449446 | Ballistically tolerant control system An improved jam-proof control including a cylinder-piston assembly in which the piston is controllably positioned within the cylinder to perform the control function and in which the cylinder snugly envelopes a deformable sleeve so that when the cylinder ... | 05/22/1984 |
| 4442647 | Soundproofing panel mounted to effect vibration isolation A rigid soundproofing panel is supported from a vibration-prone wall through a support system which includes an elastomeric plate isolator of selected spring rate to tune the suspension system so that minimal wall vibrations are imparted to the soundproof... | 04/17/1984 |
| 4439106 | Rotor blade shaft integrity monitoring system A helicopter rotor blade to hub arm attachment configured to react centrifugal loads from the blade through a blade cuff, spindle, and elastomeric bearings utilizes a bolt in the bore of the spindle for secondary load path operation and a spindle integrit... | 03/27/1984 |
| 4421287 | Helicopter cyclic stick midposition feel indicator To provide the pilot with the "feel" that he is inadvertently moving his cyclic control stick from its midposition when the helicopter is on the ground, and thereby possibly changing the rotor plane from a safe to an unsafe position for ground personnel, ... | 12/20/1983 |
| 4405101 | Vibration isolation system A vibration isolation system in which a supported body is supported from a vibration excitation body which is prone to vibrate at a predominant frequency and to impart such vibratory forces and motions to the supported body. The isolation system is of the... | 09/20/1983 |
| 4373862 | Rotor blade shaft integrity monitoring system A helicopter rotor blade to hub arm attachment configured to react centrifugal loads from the blade through a blade cuff, spindle, and elastomeric bearings utilizes a pre-loaded bolt through the spindle for load sharing therewith and a spindle integrity m... | 02/15/1983 |
| 4365770 | Fixed position variable frequency pendular-type vibration absorber A variable frequency vibration absorber adapted to be fixedly mounted in a fixed vibration prone system to coact with the system principal vibration excitation source to control system vibration. The vibration absorber is bifilar in construction and the n... | 12/28/1982 |
| 4340335 | Helicopter tail rotor with pitch control mechanism In a helicopter tail rotor of flexrotor or, composite bearingless rotor design, a control wheel member is positioned in spaced relationship to the torque tube at the blade inner end and is connected thereto by pivotal push-pull rods connected at one of th... | 07/20/1982 |
| 4334828 | Helicopter blade with a tip having a selected combination of sweep, taper and anhedral to improve hover efficiency A helicopter blade of moderate twist having an improved tip utilizing a combination of sweep, taper and anhedral to improve hover performance by unloading the blade tip and reducing the strength of the tip vortex and displacing that tip vortex away from t... | 06/15/1982 |
| 4324530 | Helicopter blade with a tip having a selected combination of sweep, taper and anhedral to improve hover efficiency A helicopter blade of high twist having an improved tip utilizing a combination of sweep, taper and anhedral to improve hover performance by unloading the blade tip and reducing the strength of the tip vortex and displacing that tip vortex away from the f... | 04/13/1982 |
| 4323094 | Crashworthy aircraft fuel storage system A crashworthy aircraft fuel storage system normally operative so that the fuel tank, fuel shut-off valve assembly and the fuel inlet connection to the fuel tank are normally assembled to be free floating with respect to the aircraft structure, and further... | 04/06/1982 |
| 4323332 | Hingeless helicopter rotor with elastic gimbal hub A hingeless helicopter rotor including an aerodynamically shaped hub having a flexible diaphragm as its bottom wall, which diaphragm is connected to the rotor drive shaft and is elastically deformable in response to blade loading to tilt in any direction ... | 04/06/1982 |
| 4304094 | Engine air particle separator for use with gas turbine engine An engine air particle separator for use with a turbine engine and providing a first engine air flow path to the engine inlet in which foreign particles are separated from the air entering engine, and a second direct flow path for air to the engine inlet ... | 12/08/1981 |
| 4300439 | Ballistic tolerant hydraulic control actuator and method of fabricating same A ballistic tolerant control actuator of the hydraulic cylinder-piston type and having a hybrid housing comprising a structural outer wall of selected characteristics and wall thickness "t", a central sleeve snuggly fitted within the outer wall and being ... | 11/17/1981 |
| 4299538 | Cross beam rotor A helicopter rotor having an even number of articulated blades wherein opposing blades are interconnected by a common spar passing across the rotor axis. Pitch change is introduced to the blade at the spar-blade attachment joint through a torque member co... | 11/10/1981 |
| 4297080 | Rotor blade pitch control linkage In a helicopter rotor, a blade control linkage is externally supported on the rotor hub and connected to the root end of a torque tube to provide torsion inputs to the blade by twisting the flexible spar member, which is enveloped by the torque tube and j... | 10/27/1981 |
| 4284387 | Blade fold restraint system In a fully articulated helicopter rotor head, utilizing an elastomeric bearing to support each rotor blade and react centrifugal flight loads, a blade restraint, effective in three axes is provided for use during blade folding for aircraft stowage purpose... | 08/18/1981 |
| 4278010 | Fluid flow regulator valve A fluid flow regulator valve to regulate flow to a fluid driven prime mover wherein a selectively shaped, spring biased spool is positioned within a cylinder and has a sensor orifice therein to establish a pressure drop thereacross in response to controll... | 07/14/1981 |
| 4248572 | Helicopter blade A cambered helicopter blade having a swept and tapered tip, and having linear twist throughout the outer 70 percent of the blade span and nonlinear twist inboard thereof.... | 02/03/1981 |
| 4247061 | Helicopter with stabilator detuned in antisymmetric vibration modes from main rotor wake excitation frequency A helicopter stabilator having naturally high response to the main rotor wake excitation frequency in roll and yaw stabilator vibratory modes is selectively mounted so as to be detuned therefrom in antisymmetric stabilator vibratory modes without adversel... | 01/27/1981 |
| 4244677 | Cross-beam helicopter rotor with readily replaceable snubber A cross-beam helicopter rotor in which the torque tube enveloping the flexible spar is supported in relation thereto by an elastomeric primary snubber which is readily replaceable in the field and which utilizes a snubber retainer plate bonded to the spar... | 01/13/1981 |
| 4242047 | Adjustable bearing centering means for helicopter rotor elastomeric bearings Apparatus to center and compressively load a spherical elastomeric bearing about its static apex during helicopter rotor static mode, which centering means is adjustable from a station external of the rotor and is operable to be out of contact during heli... | 12/30/1980 |
| 4238971 | Releasable push-pull sheathed cable control system A releasable push-pull sheathed cable control system in which the sheathed cable extends between the control input and the control output and includes a looped portion fixed at one end and releasably fixed at its other end so that tension or compression l... | 12/16/1980 |
| 4235570 | Elastomeric helicopter rotor load reaction system A helicopter rotor having one or more blades mounted for rotation with the rotor hub and each supported therefrom by an elastomeric bearing, and having a lead-lag damper connected to the blade and the hub and extending substantially parallel to the blade ... | 11/25/1980 |
| 4230291 | Tuned spring-mass vibration absorber A tuned spring-mass vibration absorber in which a dynamic mass is suspended from a vibrating support member, such as a helicopter fuselage, by a plurality of cantilevered leaf springs integrally connected to the dynamic mass at selected stations so that t... | 10/28/1980 |
| 4218187 | Constant frequency bifilar vibration absorber A bifilar vibration absorber is provided for the main rotor of a helicopter in which the pendular mass is constrained so that the path of motion of its cg relative to the rotor hub is a cycloid.... | 08/19/1980 |
| 4216924 | Helicopter An improved helicopter designed to create minimum drag and turbulence in which the main rotor pylon has a top surface having a forward portion defining the rotor head well aperture so as to have a selectively curved lip on the rearward side thereof to eli... | 08/12/1980 |
| 4213518 | Fixed position pendular-type vibration absorber with linearization at fixed or variable frequencies A vibration absorber, which may be variable frequency, adapted to be fixedly mounted in a fixed vibration prone system. The vibration absorber is of the pendular-type with two dynamic masses suspended in pendular fashion from a base member, and with at le... | 07/22/1980 |
