US 7,320,570 B2
Set screw with NiTi tip
Robert Czarnek, Johnstown, Pa. (US)
Assigned to Czarnek and Orkin Laboratories, Inc., Highland Park, Ill. (US)
Filed on Feb. 15, 2005, as Appl. No. 11/58,682.
Claims priority of provisional application 60/545092, filed on Feb. 17, 2004.
Prior Publication US 2005/0180839 A1, Aug. 18, 2005
Int. Cl. F16B 35/00 (2006.01)
U.S. Cl. 411—393  [411/392] 16 Claims
OG exemplary drawing
 
1. A screw comprising:
a threaded body having a hole defined therein, wherein the hole is situated along an axis of the threaded body and the threaded body is made of a rigid metal or alloy; and
an insert partially received within the hole, wherein:
the insert is constructed of an elastic metal; and
a space is defined between an axially-extending surface of the hole and an axially-extending surface of the insert in opposition with the surface of the hole when the insert is partially received within the hole, wherein the space is defined by different shapes of the opposing surfaces of the insert and the hole, whereupon the space is configured to allow for transverse Poisson's expansion of the insert thereinto in response to compression of the insert in a direction along the longitudinal axis of the hole during use of the screw.