Patents by Inventor Avraham Seifert
Avraham Seifert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11434945Abstract: A method and device for creating a distribution of unsteady suction, the device may include ejectors; and a fluidic oscillator; wherein the fluidic oscillator may be configured to switch a first flow of fluid, in a cyclic manner, between the ejectors; wherein the ejectors may be fluidly coupled to the fluidic oscillator; and wherein each one of the ejectors may be configured to create pulsed suction through at least one first aperture, and (b) pulsed ejection through at least one second aperture.Type: GrantFiled: June 27, 2019Date of Patent: September 6, 2022Assignee: Ramot at Tel Aviv Universitv Ltd.Inventors: Avraham Seifert, Nimrod Shay, Ariel Yaniv, Ofek Drori
-
Patent number: 10988239Abstract: An active separation control system, comprising a fluidic oscillatory actuator having an ejector member, an oscillator member, and a joining channel between said oscillator member and said ejector member, all mounted on at least one flexible member, said fluidic oscillatory actuator being mountable on a rotatable door of a vehicle such that said flexible member assumes a different shape when said door is closed than when said door is open, wherein said joining channel is also flexible to assume a shape of said flexible member.Type: GrantFiled: July 19, 2017Date of Patent: April 27, 2021Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Isaac Dayan, Tom Shtendel
-
Publication number: 20200158147Abstract: A method and device for creating a distribution of unsteady suction, the device may include ejectors; and a fluidic oscillator; wherein the fluidic oscillator may be configured to switch a first flow of fluid, in a cyclic manner, between the ejectors; wherein the ejectors may be fluidly coupled to the fluidic oscillator; and wherein each one of the ejectors may be configured to create pulsed suction through at least one first aperture, and (b) pulsed ejection through at least one second aperture.Type: ApplicationFiled: June 27, 2019Publication date: May 21, 2020Inventors: Avraham Seifert, Nimrod Shay, Ariel Yaniv, Ofek Drori
-
Patent number: 10138870Abstract: A rotor which comprises at least one blade and at least one fluid routing device that is mechanically connected to one of the blades so that a fluid inlet thereof is placed in a lateral edge of the blade. The fluid routing device has a continuous channel with an inlet facing the opposite direction of rotation of the blades and an outlet. The continuous channel is sized and shaped to conduct fluid passing via the inlet. The fluid routing device includes a flow directing element that is mechanically connected to the outlet so as to direct the conducted fluid to adjust fluid flow in or on the mechanically connected blade.Type: GrantFiled: December 8, 2011Date of Patent: November 27, 2018Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Maor Hai Avnaim
-
Publication number: 20170313411Abstract: A fluidic system is disclosed. The system comprises a plurality of fluidic oscillatory actuators, and at least one synchronization conduit connecting two or more of the actuators such as to effect synchronization between oscillations in the two or more connected actuators.Type: ApplicationFiled: July 19, 2017Publication date: November 2, 2017Applicant: Ramot at Tel-Aviv University Ltd.Inventors: Avraham SEIFERT, Isaac DAYAN, Tom SHTENDEL
-
Patent number: 9718538Abstract: A fluidic system is disclosed. The system comprises a plurality of fluidic oscillatory actuators, and at least one synchronization conduit connecting two or more of the actuators such as to effect synchronization between oscillations in the two or more connected actuators.Type: GrantFiled: October 25, 2012Date of Patent: August 1, 2017Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Isaac Dayan, Tom Shtendel
-
Publication number: 20160273562Abstract: A fluidic system is disclosed. The fluidic system comprises a switching valve having a fluidic oscillatory actuator, a first blowing actuator and a second blowing actuator. The first blowing actuator is switchable by the switching valve and is configured for producing an output of fluid flow engaging a first plane. The second blowing actuator is also switchable by the switching valve and is configured for producing an output of fluid flow engaging a second plane. The second plane is different from the first plane.Type: ApplicationFiled: October 2, 2014Publication date: September 22, 2016Inventors: Avraham SEIFERT, Danny DOLGOPYAT
-
Patent number: 9193398Abstract: A method of reducing aerodynamic drag on a moving blunt-edged body, the method comprising actively generating a flow of air at a blunt edge of a body and using the generated flow of air to control an external flow of air moving relative to an edge of a moving blunt-body.Type: GrantFiled: December 30, 2013Date of Patent: November 24, 2015Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Vitali Palei
-
Patent number: 8876064Abstract: An oscillatory vorticity generator device for controlling the flow on an aero- or hydrodynamic surface of an element, the oscillatory vorticity generator device comprising: two main walls, positioned opposite to each other, forming a first pair of walls and two other walls, the four walls each having proximal and distal ends, the distal ends connected to an aero- or hydrodynamic surface; a connection connecting the walls at their proximal ends; and an opening in the aero- or hydrodynamic surface, the opening being substantially contiguous with the two main walls and the two other walls.Type: GrantFiled: November 23, 2010Date of Patent: November 4, 2014Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Oksana Stalnov, Ilan Fono, Isaac Dayan, Victor Troshin, Maor Hai Avnaim, Vitali Palei
-
Publication number: 20140284430Abstract: A fluidic system is disclosed. The system comprises a plurality of fluidic oscillatory actuators, and at least one synchronization conduit connecting two or more of the actuators such as to effect synchronization between oscillations in the two or more connected actuators.Type: ApplicationFiled: October 25, 2012Publication date: September 25, 2014Inventors: Avraham Seifert, Isaac Dayan, Tom Shtendel
-
Publication number: 20140110967Abstract: A method of reducing aerodynamic drag on a moving blunt-edged body, the method comprising actively generating a flow of air at a blunt edge of a body and using the generated flow of air to control an external flow of air moving relative to an edge of a moving blunt-body.Type: ApplicationFiled: December 30, 2013Publication date: April 24, 2014Applicant: Ramot at Tel-Aviv University Ltd.Inventors: Avraham SEIFERT, Vitali Palei
-
Patent number: 8616615Abstract: A method of reducing aerodynamic drag on a moving blunt-edged body, the method comprising actively generating a flow of air at a blunt edge of a body and using the generated flow of air to control an external flow of air moving relative to an edge of a moving blunt-body.Type: GrantFiled: April 27, 2008Date of Patent: December 31, 2013Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Vitali Palei
-
Patent number: 8550120Abstract: A method of causing a fluid flow to oscillate between two exit directions. The method comprises causing a primary flow of fluid through a conduit, the conduit characterized by two exit directions and providing first and second oscillation control ports, the first and second oscillation control ports transverse to the conduit and connected to one another by a feedback tube.Type: GrantFiled: April 27, 2008Date of Patent: October 8, 2013Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Gilad Arwatz, Ilan Fono, Avraham Seifert
-
Publication number: 20130259642Abstract: A rotor which comprises at least one blade and at least one fluid routing device that is mechanically connected to one of the blades so that a fluid inlet thereof is placed in a lateral edge of the blade. The fluid routing device has a continuous channel with an inlet facing the opposite direction of rotation of the blades and an outlet. The continuous channel is sized and shaped to conduct fluid passing via the inlet. The fluid routing device includes a flow directing element that is mechanically connected to the outlet so as to direct the conducted fluid to adjust fluid flow in or on the mechanically connected blade.Type: ApplicationFiled: December 8, 2011Publication date: October 3, 2013Applicant: RAMOT AT TEL-AVIV UNIVERSITY LTD.Inventors: Avraham Seifert, Maor Hai Avnaim
-
Publication number: 20120256056Abstract: An oscillatory vorticity generator device for controlling the flow on an aero- or hydrodynamic surface of an element, the oscillatory vorticity generator device comprising: two main walls, positioned opposite to each other, forming a first pair of walls and two other walls, the four walls each having proximal and distal ends, the distal ends connected to an aero- or hydrodynamic surface; a connection connecting the walls at their proximal ends; and an opening in the aero- or hydrodynamic surface, the opening being substantially contiguous with the two main walls and the two other walls.Type: ApplicationFiled: November 23, 2010Publication date: October 11, 2012Inventors: Avraham Seifert, Oksana Stalnov, Ilan Fono, Isaac Dayan, Victor Troshin, Maor Hai Avnaim, Vitali Palei
-
Publication number: 20100193035Abstract: A method of causing a fluid flow to oscillate between two exit directions. The method comprises causing a primary flow of fluid through a conduit, the conduit characterized by two exit directions and providing first and second oscillation control ports, said first and second oscillation control ports transverse to said conduit and connected to one another by a feedback tube.Type: ApplicationFiled: April 27, 2008Publication date: August 5, 2010Applicant: Ramot At Tel Aviv Univeristy LtdInventors: Gilad Arwatz, Ilan Fono, Avraham Seifert
-
Publication number: 20100194142Abstract: A method of reducing aerodynamic drag on a moving blunt-edged body, the method comprising actively generating a flow of air at a blunt edge of a body and using the generated flow of air to control an external flow of air moving relative to an edge of a moving blunt-body.Type: ApplicationFiled: April 27, 2008Publication date: August 5, 2010Applicant: Ramot At Tel Aviv University Ltd.Inventors: Avraham Seifert, Vitali Palei
-
Patent number: 7055541Abstract: A method and mechanism of producing a suction and periodic excitation flow. The method includes providing fluid flow from jet port with diameter dl at a controlled input pressure (Pin), directing the flow to a conduit with diameter d2, >d1, allowing additional fluid to join the flow through suction slot(s) to create an amplified flow in the conduit, further directing the amplified flow in a first direction by applying a transverse pressure differential, further redirecting the amplified flow in another direction by modifying an angle by which the transverse pressure differential is applied and iteratively repeating the further directing and further redirecting so that the amplified flow oscillates between the directions. The suction and periodic excitation flows may be employed, for example, to effectively control boundary layer separation. A mechanism for automated performance of the method is also disclosed.Type: GrantFiled: September 7, 2004Date of Patent: June 6, 2006Assignee: Ramot at Tel-Aviv University Ltd.Inventors: Avraham Seifert, Shlomo Pastuer
-
Publication number: 20060048829Abstract: A method and mechanism of producing a suction and periodic excitation flow. The method includes providing fluid flow from jet port with diameter d1 at a controlled input pressure (Pin), directing the flow to a conduit with diameter d2, >d1, allowing additional fluid to join the flow through suction slot(s) to create an amplified flow in the conduit, further directing the amplified flow in a first direction by applying a transverse pressure differential, further redirecting the amplified flow in another direction by modifying an angle by which the transverse pressure differential is applied and iteratively repeating the further directing and further redirecting so that the amplified flow oscillates between the directions. The suction and periodic excitation flows may be employed, for example, to effectively control boundary layer separation. A mechanism for automated performance of the method is also disclosed.Type: ApplicationFiled: September 7, 2004Publication date: March 9, 2006Inventors: Avraham Seifert, Shlomo Pasteur
-
Patent number: 6751530Abstract: A vehicle capable of flight including at least one wing including at least one oscillatory momentum generator mounted therein. A thrust force from the oscillatory momentum generator is directed outwards over the wing causing a lift-generating air flow over a wing surface. A method of flying a vehicle including providing at least one wing having at least one oscillatory momentum generator mounted therein and applying a thrust force from the generator which is directed outwards over the wing and directed to the trailing edge so that a lift generating air flow is created.Type: GrantFiled: June 10, 2002Date of Patent: June 15, 2004Assignee: Ramot At Tel Aviv University Ltd.Inventors: Avraham Seifert, David Greenblatt, Israel Wygnanski