Phillips Head Screwdriver

Patent - Phillips Head Screwdriver

Inventors - Henry F Phillip

Published - 7 July 1936

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The Phillips screw drive was created by John P. Thompson, who after failing to interest manufacturers, sold his design to businessman Henry F. Phillips. Phillips is credited with forming a company (Phillips Screw Company), improving the design, and promoting the adoption of his product. The original patent expired in 1966, but the Phillips Screw Company continued to develop improved designs.

The American Screw Company of Providence, Rhode Island, was responsible for devising a means of efficiently manufacturing the screw, and successfully patented and licensed their method; other screw makers of the 1930s dismissed the Phillips concept because it called for a relatively complex recessed socket shape in the head of the screw — as distinct from the simple milled slot of a slotted type screw. The Phillips screw design was developed as a direct solution to a number of problems with slotted screws: too-easy cam out; precise alignment required to avoid slippage and damage to driver, fastener, and adjacent surfaces; and difficulty of driving with powered tools.

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