Phillips screwdriver with retractable slotted screw driver blade

Details Phillips screwdriver with retractable slotted screw driver blade Phillips screwdriver with retractable slotted screw driver blade

1980-09-10

1982-05-11

Kunin, Stephen G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81437, 145 64, B25G 100

Patent

active

043287212

ABSTRACT:
A tubular shank is provided having front and rear ends and including handle defining structure at its rear end and a Phillips head screw engaging tip on its front end. The tip is of the type including four equally peripherally spaced, forwardly tapering and generally radially extending Phillips screw head socket arm portion engaging lugs and includes a central passage extending therethrough opening lengthwise rearwardly into the interior of the tubular shank and forwardly through the forward end of the tip. The passage is generally rectangular in cross-sectional shape with its major transverse center line substantially bisecting the included angles formed between remote pairs of adjacent lugs of the tip. An elongated slotted screwdriver blade is guidingly lengthwise reciprocal through the passage and forwardly extendable past the forward end of the tip and retractable rearwardly from at least the forward portion of the tip.

REFERENCES:
patent: 138528 (1873-05-01), Reed et al.
patent: 180187 (1870-07-01), Bartlett
patent: 468595 (1892-02-01), Bunch
patent: 1345708 (1920-07-01), Schneider
patent: 1501222 (1924-07-01), Lamp
patent: 2329398 (1943-09-01), Duffy
patent: 2545813 (1951-03-01), Jackson
patent: 2682414 (1954-06-01), Richardson
patent: 2822714 (1958-02-01), Paparelli
patent: 3127798 (1964-04-01), Gol
patent: 3255792 (1966-06-01), Beck

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