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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7677863 | Overspeed safety device for a rotation motor An over-speed safety device for a pneumatic rotation motor having a cylinder (10), a forward end wall (11), a rear end wall (12) with a pressure air inlet opening (21), a rotor (13), and an actuator (15) co-rotative with the... | 03/16/2010 |
| 7326108 | Ventilation device In order to provide a simple design of ventilation device which has a relatively open aperture of pleasing aesthetic appearance, there is provided a face 2 for facing into a room, the face including an aperture 3. Three closure parts 5 are provi... | 02/05/2008 |
| 7238000 | Pneumatic high speed motor with pressure activated speed governor A pneumatic high speed motor includes a stator housing, a rotor journalled in the stator housing, and a pressure air inlet passage. A speed governor for the motor includes a valve element that is shiftable between an open position and a closed position for controlli... | 07/03/2007 |
| 7184268 | Dynamically adaptable electronics cooling fan In an electronic system, a method for operating a cooling fan comprises rotating an impeller about a rotational axis and detecting fan failure. The impeller is spatially expanded in response to the detected fan failure whereby airflow through the failed fan is block... | 02/27/2007 |
| 7077732 | High torque dual chamber turbine rotor for hand held or spindle mounted pneumatic tool A high torque turbine rotor for a lightweight hand held tool for grinding and polishing having a rotor that includes two separate high pressure air chambers separated by a common housing wall, each air chamber having peripheral air expelling nozzles in a tangential ... | 07/18/2006 |
| 7070385 | Versatile axial fan and centrifugal shutter mechanism An efficient axial fan has a housing enclosure with a square inlet opening and a round outlet opening, a fan assembly with a drive motor and a propeller secured to a shaft and coupled thereto. The entrance of the fan housing is provided with a shutter assembly which... | 07/04/2006 |
| 6899514 | Overspeed safety device An overspeed safety device for a pneumatic rotation motor having a stator (10) with an air inlet passage (16), a rotor (12), and a speed governor for determining a maximum speed level, and comprising a speed responsive actuator (34) conne... | 05/31/2005 |
| 6695573 | Hand-held turbine power tool A turbine tool design with a number of innovative aspects which may be incorporated into the tool individually or as a group. One aspect relates to improved speed control, based on an elastically deformable governor member disposed within the rotating imp... | 02/24/2004 |
| 6474936 | Blower impeller apparatus with one way valves Blower designs for vented enclosures include an impeller having a plurality of blades. A plurality of one way valves are interleaved between the blades to permit substantial airflow only in one direction. One valve design incorporates flaps coupled to eit... | 11/05/2002 |
| 6276895 | Fan with centrifugal shutter mechanism A fan has an associated centrifugal mechanism and a shutter, comprising a plurality of pivoted vanes and a central vane pivotally interconnected with a pair of heavy tie rods. The centrifugal mechanism is driven by the fan propeller and comprises a hermet... | 08/21/2001 |
| 6241464 | Governor mechanism for a rotary device A governor mechanism is mounted for rotation with a drive shaft about an axis, has one or more reaction nozzles for imparting rotational movement to the drive shaft, and one or more valve portions supported for radially directed sliding movement between f... | 06/05/2001 |
| 6179552 | Speed control unit for a pneumatic rotation motor A speed control unit for a pneumatic rotation motor having a stator (10) with an air inlet passage (14), a rotor (11) journalled in the stator (10). The speed control unit includes a speed governor (26) operated by two or more fly-weight members (28), and... | 01/30/2001 |
| 5288202 | Centrifugal regulator device for opening and closing the shutter of an axial electric fan unit and an electric fan unit utilizing this device A centrifugal regulator device for opening and closing the pivoted-vane shutter associated with an electric fan unit, has a base element connected for rotation with the fan and an actuator member guided for movement towards and away from the base element ... | 02/22/1994 |
| 5234320 | Centrifugal suction pump A centrifugal suction pump includes a vertically disposed support tube having upper and lower ends, a liquid check valve on the lower end of the support tube, and a hollow rotatable hub mounted on the upper end of the support tube. A number of horizontall... | 08/10/1993 |
| 4776752 | Speed governed rotary device A governor device for controlling the speed of rotary devices is disclosed. The governor device is a valve operated by centrifugal force to control a pressurized fluid through the nozzles of a turbine rotor. The valve comprises a rotary chamber having an ... | 10/11/1988 |
| 4729436 | Ball and disc over-speed shut-off mechanism for a rotary pneumatic tool A rotary pneumatic tool includes an over-speed shut-off mechanism including a shiftable spring washer and flyweights for imparting a shifting force to the spring washer dependent on the speed of the tool. In the preferred embodiment, the spring washer is ... | 03/08/1988 |
| 4565322 | Liquid spray apparatus for dispensing liquid droplets of constant droplet size A liquid spray apparatus comprises a pneumatic drive and automatic speed regulating device. To this end, a vane wheel which can be acted upon by an air stream is mounted axially displaceably on a shaft. The vane wheel is in contact with regulating element... | 01/21/1986 |
| 4540337 | Ram air turbines A cup shaped disc (13) consisting of a central portion (20) having radially extending blades (18) is attached with its central portion to the protruding hub portion (12) of a radial flow turbine wheel (2) consisting of a backing plate (10) extending trans... | 09/10/1985 |
| 4518310 | Apparatus for preventing overspeed of a turbine drive means Apparatus associated with a component part of the drive system of a turbine assembly reduces the power applied to its drive rotor in a direct and substantially instantaneous response to the speed of its rotation rising to a predetermined level. A turbine ... | 05/21/1985 |
| 4482291 | Automatic air inlet damper An improved automatic inlet damper is disclosed which is particularly suited for use in oil burners. A flexible coupling (16-44) is connected between rotating shafts (10, 12) and supports an automatically actuated closure (64) which is moved into and out ... | 11/13/1984 |
| 4465443 | Pneumatic power tool with speed governor and overspeed safety device In a pneumatically powered portable tool there is provided a speed governor and an overspeed safety device the purpose of which are to ensure a predetermined maximum speed by controlling the air inlet flow to the motor. A cup-shaped shell insert (28) is d... | 08/14/1984 |
| 4396346 | Centrifugal governor A centrifugal governor comprises a bar member pivotally mounted on a rotatable bearing member. The bar member is provided with an inclined ramp against which a follower bears which is connected to a device which is to be regulated. First and second resili... | 08/02/1983 |
| 4346765 | Speed responsive motor shutoff mechanism for fluid operated tool A portable pneumatic tool includes a valve closure member interposed in the tool motor exhaust passage and engaged with a speed responsive mechanism comprising a plurality of flyweights operable to move the closure member to an open position on starting o... | 08/31/1982 |
| 4307784 | Shut-off apparatus for pneumatic driven tools The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The la... | 12/29/1981 |
| 4249856 | Control apparatus for air intake in oil burners of heating boilers Apparatus for controlling air intake through the air intake aperture of the oil burner in a heating boiler includes a rotary coupling member adapted to be connected to the shaft of the oil pump and/or air blower so that it extends substantially along the ... | 02/10/1981 |
| 4222702 | Deceleration sensitive air tool shutoff A shutoff mechanism for a pneumatic tool such as a nut runner senses both the instantaneous speed and the instantaneous rate of change of speed of the drive components of the tool. The mechanism controls the flow of air to the motor and terminates such fl... | 09/16/1980 |
| 4120604 | Portable pneumatic nut running tool having air shut-off controls A hand held pneumatic nut running tool including an air vane rotary motor, manipulative valving for initially starting air flow to the motor and then terminating such flow, and an air flow shut-off control valve responsive to acceleration of the motor aft... | 10/17/1978 |
| 4087198 | Speed governed rotary device A rotary device with a speed governor as a part of a centrifugally radially expandable rotor and having radially adjustable prestress means for preselecting the maximum speed at which the governor operates to limit the speed to this maximum. The rotor whi... | 05/02/1978 |
| 4076449 | Pressure gas engine A pressure gas engine such as a compressed air turbine having a variable speed device for controlling the speed of a rotor and also having an overspeed safety device to prevent damage to the engine in the case of excess speed through malfunction. The over... | 02/28/1978 |
| 4057360 | Pressure gas engine A pressure gas engine such as compressed air turbine in which gas flow to a pressure responsive rotor is controlled by a movable valve that is operated by a bellows with means connecting each side of the bellows to the gas in the turbine for substantially... | 11/08/1977 |
| 4032252 | Pressure gas engine A pressure gas engine such as a compressed air turbine in which gas flow to a pressure responsive rotor is controlled by a movable valve that is operated by a bellows with means connecting each side of the bellows to the gas in the turbine for supplying s... | 06/28/1977 |
| 4004859 | Air tool with speed responsive shutoff A speed responsive shutoff for a pneumatic tool such as a nut runner is disclosed. The shutoff, effective to terminate air supply to the air motor under load, employs a centrifugally operated air valve having a flat valve head which is biased against a va... | 01/25/1977 |
| 3976389 | Pressurized gas engine A pressure gas engine in which pressurized gas such as air is supplied to a series of arcuately arranged nozzles for exhausting into a series of arcuately arranged impulse buckets thereby causing rotation of a rotor in which the buckets are located, each ... | 08/24/1976 |
