Screw back removal tool

Details Screw back removal tool Screw back removal tool

1977-02-10

1978-06-06

Jones, Jr., James L.

Tools

Watchmakers'

81128, G04D 300, B25B 1318

Patent

active

040928799

ABSTRACT:
A self adjusting spanner wrench for screw type watch backs comprises a generally cylindrical body member having sings at one end and a plurality of adjustable gripper members extending from the opposite end and includes cam means internally of the body member for engaging the plurality of grippers for camming them radially inward for gripping a watch back or the like upon axial movement of the body member with respect to the gripping members.

REFERENCES:
patent: 3445913 (1969-05-01), Piquerez

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