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Pet Toilet-Like Water Disk and Food Storage
One pet-friendly inventor patented "a device for watering pets, e.g., a dog or cat." The device, he helpfully noted, "has the general shape of a toilet."
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| Number | Title | Issue Date |
| 8137066 | Pressure based load measurement A system and method for a pressure based load measurement system are provided. The system includes two pressure orifices arranged on a top surface and a bottom surface of an airfoil. The pressure differential between these two points is determined and an estimate of... | 03/20/2012 |
| 7338017 | Methods and apparatus for vibration and buffet suppression Apparatus and methods for hybrid actuation and suppressing vibration are disclosed. In one embodiment, a hybrid actuator includes a first actuator and a second actuator linked to move a component a combined actuation distance. The first actuator may include a hydrau... | 03/04/2008 |
| 7323792 | Wind turbine A wind turbine including an open hub, foldable blades attached to the rim of the hub, and a mechanism for tilting the turbine is disclosed. ... | 01/29/2008 |
| 7255309 | Vernier active flow control effector Methods and apparatus for controlling the attitude of a mobile platform with a resolution suitable for vernier attitude control. In a preferred embodiment, a method includes flowing fluid through an orifice of an aerodynamic surface. The method also includes modifyi... | 08/14/2007 |
| 7223073 | Boat propeller A boat propeller comprising a central hub member and an inner hub assembly that defines a longitudinally extending bore having an inner surface. The exterior surface of the central hub member is sized and shaped for disposition therein the bore of the inner hub asse... | 05/29/2007 |
| 7182573 | Wind turbine A wind turbine, with: a rotatable frame; a plurality of airfoils mounted to the rotatable frame, wherein the airfoils extend parallel to an axis of rotation of the rotatable frame; a wind block positioned to restrict airflow over at least a portion of the rotatable ... | 02/27/2007 |
| 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 |
| 7156609 | Method of making complex twisted blades with hollow airfoil cross section and the turbines based on such A reactive turbine, each blade of which approximates a helical shape that is constructed with readily available conventional manufacturing techniques. The blades are constructed in discrete straight sections that, when joined, approximate a helix or any other effici... | 01/02/2007 |
| 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 |
| 7109599 | Omni-directional wind turbine electric generation system An omni-directional wind turbine electric generation system including a wind rotor carrying wind responsive vanes which on one surface exert an aerodynamic lifting force and on the other a blocking force both of which exert a torque in the same rotational sense, and... | 09/19/2006 |
| 7011503 | Fan blade for allowing airflow with fan in failure condition A fan and a fan blade are provided for allowing airflow through the fan blade in a fan failure condition. The fan blade includes a peripheral member defining an opening. A flexible cover member is attached to the peripheral member for covering the fan blade opening ... | 03/14/2006 |
| 7008184 | Control for cooling fan A control for changing direction of air flow through a cooling core in response to an external signal and a purge signal includes a logic circuit and a relay assembly. The logic circuit generates a fan control signal based on the external signal, which causes the fa... | 03/07/2006 |
| 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 |
| 6821090 | Gust alleviation/flutter suppression device An active control device is disclosed comprising an array of actively controlled oscillating air jets disposed on an aircraft structure. In a preferred embodiment, the device senses parameters associated with incipient unsteady aerodynamic excitation, such as free s... | 11/23/2004 |
| 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 |
| 6543719 | Oscillating air jets for implementing blade variable twist, enhancing engine and blade efficiency, and reducing drag, vibration, download and ir signature A porous surface on an aircraft structure driven with oscillating positive and negative pressures is used as an active control device for attenuating negative aerodynamic interactions. The porous surfaces can be driven with positive and negative pressures... | 04/08/2003 |
| 6506010 | Method and apparatus for compressor control and operation in industrial gas turbines using stall precursors An apparatus for monitoring the health of a compressor including at least one sensor operatively coupled to measure the dynamic pressure of gases flowing through the compressor, a processing system coupled to at least one sensor, the processor system reco... | 01/14/2003 |
| 6461106 | Method for reducing blade-vortex interaction noise generated by a rotary wing The present invention relates to a method for reducing the blade-vortex interaction noise of rotary wings. According to the invention: at least one value .PSI.o of the azimuth of the blades (1) is determined, for which value said blades shed tip vortices ... | 10/08/2002 |
| 6368059 | Controlled passive porosity systems to mitigate cavitation A controlled passive porosity system includes a lifting device for operation in a multi-phase liquid, the lifting device having a low pressure surface with a plurality of holes and a high pressure surface with a plurality of holes. A common plenum is disp... | 04/09/2002 |
| 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 |
| 6234751 | Oscillating air jets for reducing HSI noise Porous surfaces on an aerodynamic structure driven with positive and negative pressures are used in an active control system for attenuating shock waves responsible for high-speed impulsive (HSI) noise. The control system includes an array of apertures in... | 05/22/2001 |
| 6171056 | Technique for providing a signal for controlling blade vortex interaction noise of a rotorcraft A technique for providing a signal representative of blade vortex interaction (BVI) noise for a multi-blade rotorcraft. The fluid (air) pressure at one, two, or more predetermined locations on a rotor blade is measured during at least one predetermined az... | 01/09/2001 |
| 6092990 | Oscillating air jets for helicopter rotor aerodynamic control and BVI noise reduction An active control system for reducing blade-vortex-interaction (BVI) noise generated by a rotor blade. The active control system includes a pressure sensor assembly, a device for changing a lift generated by the rotor blade, and a controller for activatin... | 07/25/2000 |
| 5997250 | Method and apparatus for controlling pitch of an aircraft propeller A propeller pitch control apparatus for an aircraft in which the vector sum of the aircraft forward speed and the propeller rotational tip speed is a selected fraction of the speed of sound, the fraction based on percent power and altitude, to maximize ef... | 12/07/1999 |
| 5951249 | Self governing fluid energy turbine A fluid energy turbine has a radial flow rotor in which fluid driven blades are peripherally distributed about a horizontal axis and in which auxiliary-biased outlet gates are provided for release of high fluid pressures to govern turbine speed such as in... | 09/14/1999 |
| 5938404 | Oscillating air jets on aerodynamic surfaces An active control device for use on an aerodynamic structure is provided. The aerodynamic structure includes an outer aerodynamic skin and an interior volume, wherein the outer aerodynamic skin surrounds the interior volume. The active control device incl... | 08/17/1999 |
| 5863180 | Turbine with circumferential support A wind energy turbine having air driven blades peripherally distributed about a horizontal rotational axis forming an interior region in which air pressures built up by wind introduced thereto are released through the spaces between the blades. The rotor ... | 01/26/1999 |
| 5743712 | Turbine support and energy tranformation Apparatus for peripherally supporting the rotor of a fluid driven turbine and for power take-off of energy by transformation of peripheral speed of the rotor to use such as to drive one or more electric generators to provide electric power output as deter... | 04/28/1998 |
| 5632599 | Turbine with circumferential support and stationary pressure release means A wind energy turbine having air driven blades peripherally distributed about a horizontal rotational axis forming an interior region in which air pressures built up by wind introduced thereto are released through the spaces between the blades. A stationa... | 05/27/1997 |
| 5591004 | Turbine support and energy transformation A support for peripherally supporting the rotor of a fluid driven turbine and for power take-off of energy by transformation of peripheral speed of the rotor to use such as to drive one or more electric generators to provide electric power output as deter... | 01/07/1997 |
| 5425619 | Self governing fluid energy turbine A fluid energy turbine has a radial flow rotor in which fluid driven blades are peripherally distributed about a horizontal axis and in which auxiliary biased outlet gates are provided for release of high fluid pressures to govern turbine speed such as in... | 06/20/1995 |
| 4870412 | Warning device on an aircraft A measuring device (1, 12, 13, 14) is equipped with a blade angle indicator (1) indicating the blade angle adjustment of the rotor blades of a helicopter, a pressure altimeter (13) and an outside temperature probe (14). The measuring device (1, 12, 13, 14... | 09/26/1989 |
| 4815928 | Blade cooling In one form of the present invention, turbine cooling air is modulated as a function of engine speed, altitude, and blade temperature.... | 03/28/1989 |
| 4596512 | Circulation controlled rotor blade tip vent valve Inadvertent slot opening in a circulation controlled rotor due to plenum valve leakage is averted by venting duct pressure below a control minimum. A vent valve is disclosed.... | 06/24/1986 |
| 4135854 | Control system for variable pitch axial fan for utility boiler The disclosed system detects the pressure rise across the fan and the flow rate in the system and integrates signals corresponding thereto, and outputs a signal to indicate to the user when the pressure rise exceeds a given level for a corresponding flow ... | 01/23/1979 |
| 4089846 | Polysalts of acid-ester compounds with hydrazine or hydrazides and method of preparing heterocyclic polymers from said polysalts Novel polymers formed from the reaction of tricarboxylic anhydrides and hydrazines or hydrazides which may be cross-linkable by further reaction with a hydrazine or hydrazide are disclosed.... | 05/16/1978 |
