(54) THREADED SCREW FASTENER
CHARACTERIZED BY HIGH PULL-OUT
RESISTANCE, REDUCED INSTALLATION
TORQUE, AND UNIQUE HEAD STRUCTURE
AND DRIVE SOCKET IMPLEMENT OR
(75) Inventors: Cheryl L. Panasik, Elburn, IL (US);
Yongping Gong, Glenview, IL (US)
(73) Assignee: Illinois Tool Works Inc., Glenview, IL (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 57 days.
(21) Appl. No.: 10/681,193
(22) Filed: Oct. 9, 2003
(65) Prior Publication Data
US 2005/0076751 Al Apr. 14, 2005
(51) Int. CI.
B2SB 23/00 (2006.01)
(52) U.S. CI 81/451; 81/460; 81/461;
(58) Field of Classification Search 411/410,
411/411, 414, 416, 402; 81/460, 461, 451 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
1,435,134 A 11/1922 Boley
2,076,041 A * 4/1937 Payne 411/410
2,248,695 A * 7/1941 Bradshaw 411/410
2,334,406 A 11/1943 Gray
2,353,531 A * 7/1944 Whitney 411/410
3,283,638 A * 11/1966 Ansingh 411/410
3,812,757 A * 5/1974 Reiland 411/5
3,888,144 A * 6/1975 Parsons 81/436
A threaded screw fastener is provided with a head portion that has integrally incorporated therein dual drive structure whereby the single threaded screw fastener can be rotatably driven by alternative rotary drive socket implements or tools, such as, for example, hexagonally configured or Phillips head configured drive tools or implements, or a combination drive tool. A drive socket implement or tool also has integrally incorporated therein both hexagonally configured drive structure, Phillips head drive structure, and domed contour structure for not only structurally engaging both the hexagonally configured structure and the Phillips head structure integrally incorporated upon the head portion of the threaded screw fastener, but in addition, accommodates the low profile domed structure of the head portion of the threaded screw fastener. Lastly, the threaded screw fastener also comprises thread structure wherein each thread of the threaded screw fastener comprises rearward and forward flank surfaces which effectively serve to simultaneously enhance the pull-out resistance characteristics or properties of the threaded screw fastener while reducing the installation or insertion torque characteristics or properties of the threaded screw fastener.
17 Claims, 4 Drawing Sheets