Patent ID: 7507887

Claim:
A truss rod apparatus for adjusting neck curvature in a stringed musical instrument comprising: a) a first elongate member, said first elongate member including adjuster means for changing its length, said adjuster means including a first threaded section, a second threaded section and an adjuster nut, said first and second threaded sections being axially oriented and having similar thread direction and differing thread pitch, said adjuster nut being located at one end of said first elongate member and having engagement means by which said adjuster nut may be engaged with a tool for the purpose of rotating it, b) a first end block, said first end block being threadedly engaged with said first threaded section of said adjuster means, and having attachment means by which said first end block may be fixedly attached to a second elongate member, and c) a second end block, said second end block being located at the opposite end of said first elongate member from said first end block, said end block having connection means by which said second end block is connected to said first elongated member, and anchoring means by which said second end block may be anchored to said second elongate member, whereby rotating the adjuster nut induces a small amount of bending in the truss rod thus providing a slimly profiled and precisely adjustable apparatus for adjusting the curvature of a wide variety of stringed musical instrument necks.