Tool driving or impacting – Impacting devices – With impact cushioning means
Patent
1996-02-28
1999-02-16
Carone, Michael J.
Tool driving or impacting
Impacting devices
With impact cushioning means
173133, B25D 904
Patent
active
058710590
ABSTRACT:
The present invention realizes effective recoil reduction and idling strike prevention with a minimum constitution. In a tool holder (6), a thermal-resistant O-ring (22) is arranged between two steel washers (21,23) near the joint to the barrel (5). The O-ring (22) has a cross-sectional diameter of approximately 7 mm. The inner diameter of the O-ring (22) is made slightly greater than the diameter of a cylindrical portion (19b) formed at the rear of an intermediate element (19) and slightly smaller than the diameter of a flange (19a) formed at the rear of the cylindrical portion (19b). Likewise, the inner diameter is made slightly greater than the diameter of a recess (18b) of a striking member (18) formed in front thereof and slightly smaller than the diameter of a flange (18a) formed in front of the recess (18b). The cylindrical portion (19b) of the intermediate element (19) is extended backward for such a distance that, when the cylindrical portion (19b) is fitted in the O-ring (22), the flange (19a) is positioned behind, and out of contact with, the O-ring (22).
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Kasuya Yoshihiro
Sakuraghi Masaki
Shibata Mitsuyoshi
Ark Darren
Carone Michael J.
Makita Corporation
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