Title:
圧縮空気ねじ締め機
Document Type and Number:
Japanese Patent JP4089569
Kind Code:
B2
Abstract:
A pneumatically operated screw driver ensuring a complete return of a piston to its top dead center. The screw driver has a compressed air return chamber for returning the piston to its top dead center by applying a compressed air in the return chamber to the piston. The piston includes a main piston and an auxiliary piston. The main piston is first reaches its bottom dead center, and then the auxiliary piston reaches its bottom dead center whereupon screw driving is terminated. Before the auxiliary piston reaches its bottom dead center, and after the main piston moves past a predetermined position, a compressed air is introduced into the return chamber. After the main piston reaches the bottom dead center, application of the compressed air pressure in the return chamber to the auxiliary piston is prevented.
More Like This:
| WO/2012/165113 | POWER TOOL |
| JP2015047688 | ATTACHMENT OF HOME SCREWDRIVER ELECTRIC POWER TOOL |
| JP4837002 | Tightening device |
Inventors:
Ken Kamo
Akira Uno
Michio Wakabayashi
Haruhiko Ouchi
Yasuo Sasaki
Akira Uno
Michio Wakabayashi
Haruhiko Ouchi
Yasuo Sasaki
Application Number:
JP2003328228A
Publication Date:
May 28, 2008
Filing Date:
September 19, 2003
Export Citation:
Assignee:
Hitachi Koki Co., Ltd.
International Classes:
B25B21/00; B25B21/02
Domestic Patent References:
| JP11235628A | ||||
| JP9216170A | ||||
| JP2001121438A | ||||
| JP2001353671A |