US Patent: 1,105,535 - Screw Extractor


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US Patent: 1,105,535

Screw Extractor

Patentee:

Julius O. Roberts (exact or similar names) - Salina, KS

USPTO Classifications:

408/210, 408/241R, 81/441, 81/53.2

Tool Categories:

specialty tools : screw extractors

Assignees:

None

Manufacturer:

Cleveland Twist Drill Co. - Cleveland, OH

Witnesses:

Patent Dates:
Applied:	Mar. 24, 1913
Granted:	Jul. 28, 1914

Patent Pictures:

Julius O Roberts Patent 1,105,535 - early "review" from STEAM

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Description:

Tapered steep spiral twist (left hand for right-hand threaded screws), with biting edge, to be inserted in a hole drilled in a broken screw or bolt, and turned with a tap wrench, etc.

EZY-OUT produced by Cleveland Twist Drill Co. starting in 1916.