US 7,261,023 B2Granted

Bit holder device

AssigneeVessel Industrial Co., Ltd.

InventorYasuaki Taguchi

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Abstract

Provided is a bit holder device which is capable of driving a screw into a workpiece, while holding the screw having a groove in which a bit body is inserted, and which makes it possible to change the bit body without removing it from a chuck of an electric tool, etc. A bit holder device facilitating the attachment and detachment of a cylindrical body is also provided. A bit holder device for driving a screw, while holding the screw against detachment from a bit body with retaining a state where an end of the bit body is inserted in a groove on a head of the screw, has a cylindrical cover member removably fitted about the bit body from the end of the bit body, the cover member has an end including a magnetic attracting portion for magnetically attracting the head of the screw, and the bit body protrudes from the end of the cover member.

Claims13

Dependent claims

A bit holder device for driving a screw, while holding the screw against detachment from a bit body and retaining a state where an end of the bit body is inserted in a groove on a head of the screw, the bit holder device comprising:

a cylindrical cover member removably fitted about the bit body from the end of the bit body, the cover member having an end including a magnetic attracting portion for magnetically attracting the head of the screw, the bit body protruding from the end of the cover member, the bit body being removably held by a holder body having a shank in its rear portion, and the cover member being fitted about the holder body;
and
a movement permitting device provided between an inner surface of the cylindrical cover member and an outer surface of the holder body, said movement permitting device permitting an axial back and forth movement of the cover member relative to the holder body, the movement permitting device comprising:
a circumferential groove formed in an outer surface of the cylindrical holder body;
and
an elastic annular member provided on an inner surface of the cover member to be engaged with the circumferential groove, the circumferential groove having an axial length which is greater than that of the elastic annular member.

3 more elements

a cylindrical cover member removably fitted about the bit body from the end of the bit body, the cover member having an end including a magnetic attracting portion for magnetically attracting the head of the screw, the bit body protruding from the end of the cover member, the bit body has a shank integrally formed with its rear portion, and the cover member is directly fitted about the bit body;
and
a movement permitting device provided between an inner surface of the cylindrical cover member and an outer surface of the bit body for permitting an axial back and forth movement of the cover member relative to the bit body, the movement permitting device comprising:
a circumferential groove formed in an outer surface of the bit body;
and
an elastic annular member provided on an inner surface of the cover member to be engaged with the circumferential groove, the groove having an axial length which is greater than that of the elastic annular member.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/556,304Filed 22 Jun 2004
Priority: JP PCT/JP03/0806425 Jun 2003
Published: US 2006/0230887 A119 Oct 2006
Granted: 28 Aug 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B25B 15/001
Screwdrivers: characterised by material or shape of the tool bit
B25B 23/0035
Connections or joints between tool parts: connection means between socket or screwdriver bit and tool
B25B 23/12
For holding or positioning screw or nut prior to or during its rotation: using magnetic means
B25B
Tools or bench devices not otherwise provided for, for fastening, connecting, disengaging