Title: Screw driver bit

Abstract: A screw driver bit for use with power screw drivers having at the mounting end thereof three equiangularly spaced axial recesses which form three equiangularly spaced drive surfaces for engagement by mating surfaces within a drive socket in the power screw driver.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Lejdegard, Sixten Harald (Ramnas, SW)

Application Number: 555196
Filing Date: 1975-03-04
Publication_date: 1976-03-16
Assignee: Bulten-Kanthal AB Hallstahammar (SW)
Primary Class(es): 81/438 408/226
Other Classes:
US Patent Ref:

118178	Aug, 1871	Arnold	408/226.
1043098	Nov, 1912	Gross	408/226.
2071050	Feb, 1937	Underwood et al.	145/50.
2527492	Oct, 1950	Cleary et al.	145/50.

Other Refs:
Primary Examiner: Smith, Al Lawrence
Assistant Examiner: Zatarga, J. T.
Attorney: Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson