Spanner with prevention of disengagement of fasteners
OwnerDavid Ling, Hsien-Chung Tuan-Muinventors
Life of this patent
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Abstract
A spanner comprises a box end that has an inner periphery consisting of a number of wall faces to define a first polygonal receiving space. Each wall face includes a groove defined therein. The grooves of the wall faces together define a second polygonal receiving space. At least one of the grooves includes a closed first end and an open second end.
Claims22
A spanner comprising a box end having an inner periphery consisting of a plurality of wall faces to define a first polygonal receiving space, each said wall face including a groove defined therein, the grooves of the wall faces together defining a second polygonal receiving space, at least one of the grooves including a closed first end and an open second end.
A spanner having a box end and a drive member rotatably mounted in the box end, the drive member comprising an inner periphery consisting of a plurality of wall faces to define a first polygonal receiving space, each said wall face including a groove defined therein, the grooves of the wall faces together defining a second polygonal receiving space, at least one of the grooves including a closed first end and an open second end.
Dependencies are inferred from the claim text.