1
Osamu Izumisawa: Ratchet wrench with pivotable head. Shinano Pneumatic, Senniger Powers Leavitt & Roedel, July 28, 1998: US05784934 (285 worldwide citation)

A power ratchet wrench including a handle for gripping and holding the wrench and a head having a ratchet mechanism including a drive shaft capable of powered rotation about its axis. The head and handle have openings generally in registration with each other. A pin is received through the openings, ...


2
Osamu Izumisawa: Pneumatic rotary tool. S P Air Kabusiki Kaisha, Senniger Powers Leavitt & Roedel, July 6, 1999: US05918686 (46 worldwide citation)

A pneumatic rotary tool capable of operating in forward and reverse directions includes a housing and an output shaft projecting from the housing for transmitting torque to an object. An air motor drives rotation of the output shaft in the forward and reverse directions. Air passages extend from an ...


3
Osamu Izumisawa: Tightening device. Shinano Pneumatic, Schwartz & Weinrieb, April 18, 1989: US04821611 (31 worldwide citation)

By transferring the power fed from a motor to a ratchet mechanism through means of an impact clutch mechanism, a relatively large torque is obtained by the impact clutch mechanism. In addition when a torque greater than a predetermined level is applied to the ratchet mechanism, reaction is never giv ...


4
Osamu Izumisawa: Power abrading tool having dust abatement feature. S P Air Kabusiki Kaisha, Senniger Powers Leavitt & Roedel, July 6, 1999: US05919085 (29 worldwide citation)

An abrading tool uses oscillatory motion to achieve abrading, such as for polishing or grinding operations. The abrading tool has a spindle capable of mounting an abrading pad. A motor of the tool has an output shaft and a cam unit on the output shaft which is partially received in a cam follower mo ...


5
Osamu Izumisawa: Pneumatic rotary tool. S P Air Kabusiki Kaisha, Senniger Powers, April 19, 2005: US06880645 (24 worldwide citation)

Generally, a pneumatic rotary tool of the present invention comprises a housing formed of a plastic material and includes a motor receptacle having a front end and an open rear end. An air motor is disposed within the motor receptacle of the housing. An air inlet passage extends to the motor for del ...


6
Osamu Izumisawa: Pneumatic rotary tool. S P Air Kabusiki Kaisha, Senniger Powers Leavitt & Roedel, September 3, 2002: US06443239 (23 worldwide citation)

A pneumatic rotary tool including a housing and an output shaft projecting from the housing for transmitting torque to an object. An air motor drives rotation of the output shaft in the forward and reverse directions. Air passages extend from an air inlet to the motor for delivering pressurized air ...


7
Osamu Izumisawa: Ratchet wrench with pivotable head. S P Air Kabusiki Kaisha, Senniger Powers Leavitt & Roedel, November 6, 2001: US06311583 (22 worldwide citation)

A power ratchet wrench has a handle for gripping and holding the wrench and a head pivotally connected to the handle for pivoting movement relative to the handle about a pivot axis. A locking mechanism comprising a pivot assembly pivotally connects the head to the handle. The locking mechanism is co ...


8
Osamu Izumisawa: Hand-held pneumatic rotary drive device. S P Air Kabusiki Kaisha, Senniger Powers Leavitt & Roedel, December 12, 2000: US06158528 (21 worldwide citation)

A hand-held pneumatic rotary drive tool having an adjustable exhaust. The tool has an elongate housing containing a pneumatic motor. The housing has an inlet passage for pressurized air at the rearward end of the housing and air delivery passaging for flow of pressurized air to the motor. A rotary c ...


9
Osamu Izumisawa: Hand tool with impact drive and speed reducing mechanism. SP Air Kabusiki Kaisha Corporation, Senniger Powers, July 25, 2006: US07080578 (20 worldwide citation)

A power driven tool useful for tightening and loosening a mechanical fastener includes an impact mechanism. Preferably, the tool is pneumatic and includes a ratchet head and an impact device for providing additional torque to the ratchet head. A planetary reduction gear reduces the high output speed ...


10
Osamu Izumisawa: Rotary impact tool. Shinano Pneumatic, Senniger Powers Leavitt & Roedel, April 6, 1993: US05199505 (19 worldwide citation)

A rotary impact tool including a generally tubular cage rotated by a motor about a central longitudinal axis of the cage. The cage has an internal wall with axially extending guide channels formed in it for receiving hammer pins capable of moving axially in the guide channels. The hammer pins have a ...