Solon, OH, United States
Solon, OH, United States

The Hoover Institution is an American public policy think tank and research institution located at Stanford University in California. Its official name is the Hoover Institution on War, Revolution, and Peace. It began as a library founded in 1919 by Republican Herbert Hoover, before he became President of the United States. The library, known as the Hoover Institution Library and Archives, houses multiple archives related to Hoover, World War I, World War II, and other world history.The Hoover Institution is a unit of Stanford University but has its own board of overseers. It is located on the campus. Its mission statement outlines its basic tenets: representative government, private enterprise, peace, personal freedom, and the safeguards of the American system.The Hoover Institution is an influential voice in American public policy. The Institution has long been a place of scholarship for individuals who previously held high-profile positions in government, such as George Shultz, Condoleezza Rice, Michael Boskin, Edward Lazear, John B. Taylor, John Cogan, Edwin Meese, and Amy Zegart—all Hoover Institution fellows. In 2007, retired U.S. Army General John P. Abizaid, former commander of the U.S. Central Command, was named the Institution's first annual Annenberg Distinguished Visiting Fellow.The Institution is housed in three buildings on the Stanford campus. The most prominent facility is the landmark Hoover Tower, which is a popular visitor attraction. The tower features an observation deck on the top level that provides visitors with a panoramic view of the Stanford campus and surrounding area. Wikipedia.


Time filter

Source Type

Patent
Hoover | Date: 2015-03-10

A cyclonic separation device comprises a cyclone chamber 11 having a cyclone axis A, a fluid outlet at one end of the cyclone chamber and a tubular apertured shroud 14 extending concentrically with the cyclone axis A. In use a motor 15 rotates the shroud 14 in the direction of a rotational airflow in the chamber 11 at a rotational speed which is over 1500 rpm and/or over 70% of the airflow speed around the shroud 14. The high speed of rotation of the shroud 14 is sufficient to dislodge any dust on the shroud by centrifugal action. Also, the high rotational speed of shroud 14 means that the air does not to need to decelerate to pass through the shroud 14 apertures and hence the risk of pressure drop and a loss of suction is avoided.


Patent
Hoover | Date: 2015-03-10

A cyclonic separation device comprises a plurality of cyclonic separators fluidly arranged in parallel with each other, each cyclonic separator comprising a chamber 18 having a circular-section side wall 19, a fluid inlet 20 and a fluid outlet 21 disposed at one end of the cyclone chamber 18, and an opening at the second end of the cyclone chamber 18 through which separated matter passes out of the chamber for collection. The cyclonic separators are arranged in a rotatable body 17 such that their respective cyclone axes B are outwardly inclined relative to an axis A of rotation of the body 17 and such that the second end of each cyclone chamber 18 is disposed radially outwardly of its first end with respect to the axis A of rotation. A motor 15 rotates the body 17 about its axis A of rotation and so imparts a radially outward force on separated matter forced against the side wall 19 by the cyclonic action, the radial force serving to rapidly force the matter axially of the towards the opening. The separation efficiency is thereby improved by the radial force.


Patent
Hoover | Date: 2015-02-18

A handheld suction cleaner, in particular for hard surface such as windows, glass doors and similar, comprises a suction nozzle (8) designed for sucking a mixture of liquid and air from a hard surface, a suction unit (6) in fluid communication with the suction nozzle (8) through an air flow path, a separating chamber (10) provided in the air flow path, a suction duct (9) connected to the suction nozzle (8) and having an outflow opening (9b) placed into the separating chamber (10), and a vacuum duct (11) connected to the suction unit (6) and in fluid communication with the separating chamber (10). The separating chamber (10) communicates with the vacuum duct (11) through a communication opening (12) arranged at least in part above the outflow opening (9b) relative to an upright position of the handheld suction cleaner.


Patent
Hoover | Date: 2015-08-26

A vacuum cleaner head 10 for cleaning carpet comprises a head portion 15 which is tiltably attached to a body portion 12, the head portion 15 having a transversely extending suction mouth 18 on its underside 17. An elongate depending blade 21 extends longitudinally of the suction mouth 18 at a position between front and rear working edges 27, 28 thereof. The suction mouth 18 comprises front and rear working edges 27, 28. An arm 14 tilts the head portion 15 such that the suction mouth 18 faces rearwardly when the head 10 is moved forwardly across a floor surface to lower the front edge 27 of the mouth 18 into engagement with the carpet C. The front edge 27 distorts and parts the carpet fibres F to allow trapped dust to be extracted. Dust is also dislodged as the carpet fibres suddenly recover their shape. This process is repeated by the action of the blade 21 and dust extraction from the carpet is greatly improved and a comparatively low power motor can be used to induce the airflow through the cleaner.


Patent
Hoover | Date: 2014-03-05

A vacuum cleaner comprises first and second devices 116,125 for separating dirt and dust from an airflow through the cleaner. The dirt and dust separated by the first and second devices 116,125 is deposited at the bottom of a collection chamber 112. The dirt and dust separated by the second device 125 is transferred to the bottom of the collection chamber 112 via a passageway which is normally closed by a valve 124 to prevent air from leaving the chamber 112 along the passageway 133 instead of forming a proper cyclonic flow in the chamber 112. An actuator 131, 135, 136 is provided for periodically opening the valve 124 to release the collected dirt and dust into the bottom of the chamber 112. The actuator 131, 135, 136 simultaneously closes the passageway 133 between the valve 124 and the second device 125, so as to temporarily prevent air from leaving the chamber 112 along the passageway 133 whilst the collected dirt and dust is released. In this manner the dirt and dust from both devices can be collected together and compacted by a single compaction auger 120.


Patent
Hoover | Date: 2014-01-29

A floor cleaning apparatus comprising a steam generator 21 for providing a stean cleaning mode, a rotary brush 25 for providing a dry cleaning mode, a switch 17 operable to select the steam and/or dry cleaning mode, an upstanding handle 13, and a switch 15 disposed adjacent the upper end of the handle 13 which can be actuated to operate the cleaner in accordance with the selected mode(s). A user is thus able to operate the cleaner to provide the selected mode(s) of cleaning by actuating the switch 15 which is conveniently located on the handle 13.


Patent
Hoover | Date: 2015-10-28

A cyclonic separation device comprises a cyclone chamber 11 having a cyclone axis A, a fluid outlet at one end of the cyclone chamber and a tubular apertured shroud 14 extending concentrically with the cyclone axis A. In use a motor 15 rotates the shroud 14 in the direction of a rotational airflow in the chamber 11 at a rotational speed which is over 1500 rpm and/or over 70% of the airflow speed around the shroud 14. The high speed of rotation of the shroud 14 is sufficient to dislodge any dust on the shroud by centrifugal action. Also, the high rotational speed of shroud 14 means that the air does not to need to decelerate to pass through the shroud 14 apertures and hence the risk of pressure drop and a loss of suction is avoided.


Patent
Hoover | Date: 2015-07-29

A canister vacuum cleaner comprises a body 11 having means 26 for separating and collecting dirt and dust that is drawn into the cleaner by a motor and fan unit 25 disposed in the body 11, and a rigid tubular wand 10 connected to a body 11 of the cleaner via an elongate flexible hose 12, the tubular wand 10 having a handle portion 14 for grasping by the user, a motor 20 in the body 11 for driving a single wheel 19 disposed centrally on the underside of the body 11. A switch 15 is provided on the handle 14 for selectively operating the motor 20 to drive the body 11 forwardly and rearwardly across a floor surface on which the body 11 is located. The position of the body 11 can thus be precisely controlled to avoid possible obstruction to movement of the body 11 by contact or collision with furniture and other objects, and the possible damage and annoyance associated with such events. Also the need for the user to pay vigilant attention to the movement of the body 11 is negated.


Patent
Hoover | Date: 2015-09-16

A cyclonic separation device comprises a plurality of cyclonic separators fluidly arranged in parallel with each other, each cyclonic separator comprising a chamber 18 having a circular-section side wall 19, a fluid inlet 20 and a fluid outlet 21 disposed at one end of the cyclone chamber 18, and an opening at the second end of the cyclone chamber 18 through which separated matter passes out of the chamber for collection. The cyclonic separators are arranged in a rotatable body 17 such that their respective cyclone axes B are outwardly inclined relative to an axis A of rotation of the body 17 and such that the second end of each cyclone chamber 18 is disposed radially outwardly of its first end with respect to the axis A of rotation. A motor 15 rotates the body 17 about its axis A of rotation and so imparts a radially outward force on separated matter forced against the side wall 19 by the cyclonic action, the radial force serving to rapidly force the matter axially of the towards the opening. The separation efficiency is thereby improved by the radial force.


Patent
Hoover | Date: 2014-10-08

A vacuum cleaner comprises a detachable separation unit having first and second devices 13,26 for separating dirt and dust from an airflow through the cleaner. The dirt and dust separated by the devices 13 is deposited in a first collection region disposed at the bottom of a cyclone chamber 14. The dirt and dust separated by the second device 26 is collected in a second collection region 30 which is normally closed by a valve 35 to prevent air from leaving the cyclone chamber 14. An actuator 34 is provided for automatically opening the valve 35 to release the collected dirt and dust in the second collection region 30 when the unit is detached from the body of the cleaner, so that it can fall from the unit along with dirt and dust from the first region when a flap 17 at the bottom of the chamber 14 is opened.

Loading Hoover collaborators
Loading Hoover collaborators