1
Shigeru Shinohara, Shun Suzuki, Tatsuo Innami: Computerized circuit arrangement for jig saw. Hitachi Koki Company, Pollock VandeSande & Priddy, December 9, 1986: US04628459 (164 worldwide citation)

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 inputted via a keyboard so that the computer se ...


2
Toshiaki Imahashi, Kihachiro Matsumoto, Katsuhiko Muto, Yasunori Ogawa: Portable electric router. Hitachi Koki Company, Lowe Price LeBlanc Becker & Shur, July 3, 1990: US04938642 (70 worldwide citation)

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 the electric tool in cutting operation. Also ...


3
Shinki Ohtsu, Yo Kawakami, Hiromu Utsumi: Combustion gas powered tool. Hitachi Koki Company, Pollock VandeSande & Priddy, September 27, 1988: US04773581 (60 worldwide citation)

A housing partially defines a combustion chamber. A movable piston partially defines the combustion chamber. An air and fuel mixture is generated in the combustion chamber. The air and fuel mixture is ignited in the combustion chamber. An obstacle member is fixedly disposed in the combustion chamber ...


4
Masakuni Koreeda, Akio Nagata, Sadamoto Tachihara: Centrifugal elutriator rotor. Hitachi Koki Company, Pollock VandeSande & Priddy, June 2, 1987: US04670002 (49 worldwide citation)

A rotor for separation and collection of specimen particles carried by a liquid buffer by continuous centrifugal elutriation, whereby the interior of the rotor itself is employed as a separation chamber. This separation chamber is shaped such that the circumferential cross-sectional area thereof con ...


5
Masahiro Inaniwa, Shun Suzuki, Yoichi Ogawa: Circuit arrangement for rapidly charging a battery. Hitachi Koki Company, Pollock VandeSande & Priddy, September 2, 1986: US04609861 (48 worldwide citation)

A quick battery charger according to the present invention comprises a circuit for detecting the voltage of the battery (3), a constant-current charging circuit, a constant-voltage charging circuit, and a timer circuit responsive to the voltage detecting circuit. At the beginning in charging operati ...


6
Hiromu Utsumi, Yo Kawakami, Shinki Ohtsu: Internal-combustion piston driving apparatus having a decompression channel. Hitachi Koki Company, Lowe Price LeBlanc Becker & Shur, April 3, 1990: US04913331 (47 worldwide citation)

In an internal-combustion piston driving apparatus comprising a housing, a cylinder cover fixed to the housing, a cylinder slidably provided to the housing, a piston reciprocally slidably provided in the cylinder, a combustion chamber defined by the housing, the cylinder, and the piston, a fuel supp ...


7
Masaaki Sekizawa, Yasuo Sasaki: Hitachi Koki Company, Pollock Vande Sande & Priddy, August 30, 1983: US04401167 (46 worldwide citation)

At least two vibration proof elements are interposed between a tool body and the handle thereof. Each of the elements has a first supporting member connected to the handle, and two rubber blocks interposed between the first and second supporting members so that the element functions as a shock absor ...


8
Masanori Ito, Seiji Akiba, Hiroyasu Ishikawa: Portable power tool equipped with dust collector. Hitachi Koki Company, Pollock Vande Sande & Priddy, June 30, 1987: US04675999 (44 worldwide citation)

A portable power tool such as a portable circular saw is provided with a sawdust collection system based on the generation of an air flow resulting from rotation of a rotary cutting blade, with this air flow being guided to transport sawdust resulting from cutting operations along a guide path throu ...


9
Yoshihiko Watanabe, Yasuki Ohmori, Masaaki Sekizawa: Electric hammer drill having dust collecting device. Hitachi Koki Company, Lowe Price LeBlanc & Becker, July 14, 1992: US05129467 (42 worldwide citation)

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 which is slidably received in a stationary s ...


10
Mutsuo Harada, Akihisa Yahagi: Vibration-damping structure for electric hammer. Hitachi Koki Company, Pollock Vande Sande & Priddy, June 4, 1996: US05522466 (42 worldwide citation)

A vibration-damping apparatus for an electric hammer unit is provided. This vibration-damping apparatus is provided with the so-called transatory unit including elastic bars disposed between elastic damper members connected to a tool body and a handle of the electric hammer unit, respectively, for a ...