Quotables
"I hate what they've done to my child...I would never let my own children watch it. "
Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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 |
| D580247 | Portable electric driver | 11/11/2008 |
| 6330405 | Image forming apparatus In an image forming apparatus, the developing unit includes two developing rollers whose rotational directions are different from each other, and a bias potential of the developing roller (first developing roller) located upstream in the rotational direct... | 12/11/2001 |
| 6137968 | Image forming apparatus There are disposed optical sensors (S1, S2, S3,S4, S5, and S6) outside sheet trays (1, 2, 3). The optical axes of the optical sensors are respectively set in such a manner that they are parallel to their associated up-down tables (1a, 2a, and 3a) and pass... | 10/24/2000 |
| 6053602 | On-demand multi-nozzle ink jet head An on-demand multi-nozzle ink jet head includes a diaphragm and a plurality of piezoelectric stacks. The diaphragm forms at least one wall of a pressurizing chamber used to increase the pressure of the ink. When print signals are applied to the piezoelect... | 04/25/2000 |
| 6042210 | Matrix driving circuit of an ink jet printer and a method of driving the same An ink jet printer has a plurality of piezoelectric elements arranged in a matrix form in which each piezoelectric element is connected between one of TS lines and one of selection lines. The TS lines are connected, one by one and in a time sharing manner... | 03/28/2000 |
| 5673758 | Low-noise impact screwdriver An improved structure of an impact screwdriver is provided which achieves a low-noise screw-driving operation. The impact screwdriver includes a clutch assembly for transmitting torque provided by a motor to a tool bit. The clutch assembly includes a toqu... | 10/07/1997 |
| 5619422 | Rotor temperature control system A rotor temperature control system for a centrifuge is provided. This system includes an ambient temperature sensor for detecting ambient temperature around the system, a temperature regulating device for regulating temperature of a rotor of the centrifug... | 04/08/1997 |
| 5610465 | High-frequency motor A high-frequency motor comprises a squirrel-cage rotor. The rotor comprises an iron core having a plurality of circular slots, a plurality of conductive rods inserted into the slots, and short-circuit rings disposed at both ends of the conductive rods. Th... | 03/11/1997 |
| 5601149 | Noise reduction mechanism for percussion tools A percussion hammer tool comprises a spindle 1 causing rotation about an axis thereof. The spindle 1 is driven by a motor M. A hammer 3, slidably coupled with the spindle 1, generates a percussion force to rotate and hit an anvil. The anvil is divided int... | 02/11/1997 |
| 5558571 | Portable grinder A grinder has a grinding member. The grinder includes a rotatable spindle having an engagement portion. A first flange engages the engagement portion of the spindle. The first flange and the engagement portion of the spindle define a given play therebetwe... | 09/24/1996 |
| 5456324 | Percussion hammer A percussion hammer for a tool includes a rotational drive source. A motion converting mechanism is connected to the rotational drive source for convening rotational movement of the rotational drive source into reciprocating movement. A striking mechanism... | 10/10/1995 |
| 5346023 | Slipping torque changing apparatus for impact tool A slipping torque changing mechanism for an impact tool includes a driving source for generating a rotational motion. A motion converting mechanism is connected with this driving source for converting the rotational motion of the driving source into a rec... | 09/13/1994 |
| 5342280 | System for management of body rotation of centrifuge A management system for use in a centrifuge equipped with a detachable rotor which is rotatable so as to separate density-different samples by a centrifugal force due to the rotation. The management system is for managing the lifetime of the rotor on the ... | 08/30/1994 |
| 5325172 | Optical system for analyzing samples separated by a centrifugal separator An optical system is provided with a laser device for emitting a multiplet laser beam with two types of frequencies F1, F2, and a sample rotator on which a reference sample and a test sample containing substances are set for rotating both the test sample ... | 06/28/1994 |
| 5220498 | Positioning data correction apparatus with image analyzing and positioning apparatus including the same A positioning data correction apparatus with image analyzing, for producing a corrective positioning command used in a positioning device for positioning a tool along an axis with respect to a target on a work in response to a command, comprises: a receiv... | 06/15/1993 |
| 5199626 | Combustion gas powered tool A combustion gas powered tool includes a member defining a part of cylindrical combustion chamber having an axis. A piston is movable in a direction along the axis of the combustion chamber. The piston defines the combustion chamber in conjunction with th... | 04/06/1993 |
| 5194774 | Electric-powered tool An electric-powered tool comprises: a housing; and a brush motor contained in the housing, having: brush holders, each of brush holders holding a carbon brush; and brush terminals, made of an electrical conductive and elastic material having at least one ... | 03/16/1993 |
| 5154572 | Vacuum pump with helically threaded cylinders A vacuum pump includes a rotatable cylinder rotatably disposed coaxially around an inner stationary cylinder and in an outer stationary cylinder. The rotatable cylinder has a plurality of recesses defined in inner and outer circumferential surfaces thereo... | 10/13/1992 |
| 5149999 | Power tool with improved internal wiring structure A power tool includes an internal wiring structure having a first terminal board secured to a commutator motor stator and a second terminal board releasably engaged with the first terminal board to electrically connect terminals on the first and second te... | 09/22/1992 |
| 5138916 | Power operated screwdriver A power operated screwdriver including a support shaft firmly secured to a motor housing, a gear driven by a motor shaft and rotatably mounted on the support shaft, a main spindle slidably mounted on the supported shaft and holding a detachable drill bit,... | 08/18/1992 |
| 5135152 | Pneumatic fastener driving tool A pneumatic fastener driving tool includes a main valve operable to cause compressed air to be alternately introduced into and discharged from the upper piston chamber, a first passage leading the compressed air into the main valve chamber, a repeat valve... | 08/04/1992 |
| 5129467 | Electric hammer drill having dust collecting device An electric hammer drill including a vacuum dust collecting device for collecting dust from an area of an article being drilled by a drill bit wherein a hose extending from a body of the hammer drill is directly connected to an end of a movable first pipe... | 07/14/1992 |
| 5129868 | Quick-return motion mechanism of automatic magnetic drilling machine A quick-return motion mechanism for use in an automatic magnetic drilling machine including a feed motor for generating power transferred through a worm wheel and a high-ratio reduction gear to a handle shaft to drive an electric drill. A one-way clutch i... | 07/14/1992 |
| 5121545 | Electric circular saw with improved base tilting mechanism An electric circular saw of the type including a mechanism for tilting a base relative to the plane of a blade is provided wherein a side knob for being gripped by the user during cutting operation pivotally connects the base and a body of the circular sa... | 06/16/1992 |
| 5120208 | Molecular drag pump with rotors moving in same direction A molecular drag pump for delivering a gas under molecular flow conditions comprises a pair of parallel, helically threaded rotors rotatably mounted in a stationary housing. The rotors have respective helical threads and respective helical grooves, and ar... | 06/09/1992 |
| 5052500 | Vibroisolating handle joint structure for power tool A vibroisolating handle joint structure for a power tool such as a disc grinder has a vibratable power tool unit, a tubular handle holder fastened to the power tool unit and having first axial surfaces, a grip handle having on one end thereof a larger-dia... | 10/01/1991 |
| 5049773 | Stator assembly for motor A stator assembly for use in an electric motor includes a stator core, a coil wound in the stator core and having terminal ends connected to leads, two sheets of insulation paper interposed between the stator core and the coil, and two auxiliary insulatio... | 09/17/1991 |
| 5019023 | Speed changer mechanism for electrically powered tool An electrically powered tool such as a drill has a gear holder drivable by a motor shaft and having a larger-diameter gear and a smaller-diameter gear, a transmission shaft rotatable by the gear holder for rotating an output shaft, the transmission shaft ... | 05/28/1991 |
| 4938642 | Portable electric router A portable electric tool including an electric motor for driving a cutter to cut an object to be machined. The electric tool comprises a bracket for supporting the electric motor and handles attached to handle-mounting sections of the bracket for keeping ... | 07/03/1990 |
| 4936394 | Vibroisolating handle joint structure for power tool A vibroisolating handle joint structure for a power tool such as a disc grinder has a vibratable power tool unit, a tubular handle holder fastened to the power tool unit and having first axial surfaces, a grip handle having on one end thereof a larger-dia... | 06/26/1990 |
| 4926216 | Feeder of sheet-like photo-sensitive material A feeder for a electrophotographic printer to feed photo-sensitive paper onto the drum of the printer. Sheets of photo-sensitive paper are adhered to release paper. The sheets are separated from the release paper by rolling the sheets adhered to the relea... | 05/15/1990 |
| 4889052 | Paper feed control for a dot-line printer A dot-line printer has a hammer bank carrying a plurality of printing hammers arranged in groups, each group having a predetermined number of printing hammers displaced from one another by predetermined numbers of dot-lines in the direction of paper feed.... | 12/26/1989 |
| 4877344 | Impact printer temperature control device In a control device for an impact printer for performing a printing operation at a first printing speed, a temperature sensing element, provided such that the temperature of an electromagnet unit can be directly or indirectly detected, is operated at a fi... | 10/31/1989 |
| 4831364 | Drilling machine A drive motor connected to a drill bit serves to actuate the drill bit. An electric current is allowed to flow through the drive motor to activate the drive motor. A mechanism serves to feed the drill bit with respect to a workpiece. The current flowing t... | 05/16/1989 |
| 4796561 | Electrophotographic developing device having a shaped doctor board In an electrophotographic developing device, its doctor blade disposed adjacent to a magnetic roll so as to control the thickness of a layer of magnetic developing agent conveyed by the magnetic roll has an edge which is curved in such a manner that the g... | 01/10/1989 |
| 4778297 | Hammer coil cooling means in line printer A cooled print hammer assembly in which a plurality of hammer coils are formed in a resin member having a recess in which is placed a cooling fin. The opened faces of the fins are placed adjacent a plate of the frame of the print hammer assembly so that c... | 10/18/1988 |
| 4774545 | Cut paper electrophotographic printers with continuous paper feed mechanisms Cut paper electrophotographic printers with continuous paper feed mechanisms including a pickup roll, a photosensitive drum, a charging unit, an optical unit, a host controller, a developing unit, a transfer unit and fixing rolls. Further included are fir... | 09/27/1988 |
| 4704963 | Device for cleaning a type-carrier A device for cleaning a rotary type-carrier, in which a brush which contacts the type-carrier continuously to clean it during normal operation may be moved so that its rotary center is positioned more closely to the type-carrier. As a result, as the brush... | 11/10/1987 |
| 4628459 | Computerized circuit arrangement for jig saw A circuit arrangement including a computer is built in an electrical jig saw where various data or information, such as the sort of the material of the workpiece, the thickness of the workpiece, desired degree of finish and way of cutting, are manually in... | 12/09/1986 |
| 4621343 | Circuit arrangement for detecting error in print control apparatus In a printer of the type arranged to fire print hammers in accordance with the result of comparison between character codes and print data such that a plurality of subscans are effected during an interval in which a type carrier moves by a distance corres... | 11/04/1986 |
