Facilitated tightening device

Details Facilitated tightening device Facilitated tightening device

2005-05-09

2008-09-09

Lavinder, Jack W. (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

C411S267000, C411S935000

Reexamination Certificate

active

07422404

ABSTRACT:
A facilitated tightening device allowing a bolt to be inserted smoothly by preventing a screw block engaged with the bolt from being inclined or falling down, comprising a base (2) having a bolt-insertion hole (7) partly forming a bolt-receiving face (9) and a slope portion (8) gradually decreasing in radius toward the insertion side of the bolt (6) in a manner so as to match the bolt-insertion hole (7) formed therein, a running screw (3) slid along the slope portion (8) as a result of the axial movement of the inserted bolt (6) to be engaged with the bolt (6), a spring piece (5) that presses the running screw (3) in the downward, in the diameter-reducing direction of the running screw (3), and guide projections (10, 11) that engage with the running screw (3) so as to prevent the screw block (3) from falling down into the base (2). Also, a groove for the running screw2bis formed in the base2so as to prevent said running screw3from wobbling in the circumferential direction.

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