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Class Information
Number: 411/308
Name: Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener > Having structure to restrict rotation of threaded, mating pieces (e.g., nut lock) > Comprising a thread lock > Involving dissimilarities in the sectional configuration of the threads
Description: Device wherein the locking is occasioned by a sufficient departure, on the part of the thread of one of the threaded elements, from the shape, in cross section, of the thread of the other threaded element, that the two threads will no longer operatively engage with one another without binding to one degree or another.

Sub-classes under this class:

Class Number Class Name Patents
411/309 Resulting in the deformation of one thread by the other 12

Patents under this class:

Patent Number Title Of Patent Date Issued
8671547 Fastening member and fastening structure Mar. 18, 2014
8511955 Spiral body lock and method Aug. 20, 2013
8128671 Variable flank bone screw Mar. 6, 2012
7828500 Threaded engagement element with self-locking threads Nov. 9, 2010
7753631 Pitch diameter displaced screw Jul. 13, 2010
7731466 Thread profile modification for controlled stiffness Jun. 8, 2010
7722304 Thread locking/prevailing torque fastener and fastener assembly May. 25, 2010
7326014 Interactive fit screw thread Feb. 5, 2008
7322978 Bone anchors for use in attaching soft tissue to a bone Jan. 29, 2008
7246979 Multi-pitch screw, multi-pitch nut, feed screw device using the screw and nut, and method of producing the nut Jul. 24, 2007
7214020 Looseness resisting screw and stud hole May. 8, 2007
7156600 Die for, method of making, and fastener with lobed primary thread lead and interposed dual auxiliary thread lead with improved substrate entry end portion Jan. 2, 2007
7101134 Fastener having multiple lobed thread Sep. 5, 2006
7101133 Thread-forming screw fastener Sep. 5, 2006
7044702 Screw with a plurality of screwing angles and mold device for forming the same May. 16, 2006
7040850 Fastener for use with frangible material May. 9, 2006
7025550 Pull type swage fasteners with removable mandrel Apr. 11, 2006
6974289 Pressure flank screw and fastening system therewith Dec. 13, 2005
6945566 High-pressure connection device Sep. 20, 2005
6918727 Anchoring screw with double heads and triple threads of different depths of thread Jul. 19, 2005
6899500 Fastner having multiple-bossed lead May. 31, 2005
6464439 Low tolerance threaded fastener Oct. 15, 2002
6347917 Bolt with column and polygonal pillar to prevent seizure Feb. 19, 2002
6120865 Method for producing molding die for synthetic resin lens barrel having a helicoid and for producing the lens barrel Sep. 19, 2000
5876168 Thread forms for preventing disengagement between male and female screwheads Mar. 2, 1999
5868536 Male screw and method for manufacturing same Feb. 9, 1999
5738685 Osteosynthesis device Apr. 14, 1998
5628630 Design process for skeletal implants to optimize cellular response May. 13, 1997
5624219 High-strength bolt and high-strength nut Apr. 29, 1997
5580199 Fastening screw Dec. 3, 1996
5570983 Reduced-friction screw Nov. 5, 1996
5492442 Bone screw with improved threads Feb. 20, 1996
5417533 Bone screw with improved threads May. 23, 1995
5242252 Self-locking threaded connection Sep. 7, 1993
5226766 Bone screw with improved threads Jul. 13, 1993
5123793 Tapered locking nut Jun. 23, 1992
5120171 Bone screw with improved threads Jun. 9, 1992
4973209 Screw for contaminated pre-tapped holes Nov. 27, 1990
4653968 Adjustable abutment assembly Mar. 31, 1987
4549754 Tool joint Oct. 29, 1985
4288189 Threaded insert Sep. 8, 1981
4258768 Fastener assembly Mar. 31, 1981
4254809 Two-piece rivet Mar. 10, 1981
3972359 Vibration resistant fastener Aug. 3, 1976

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