Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2005-06-21
2005-06-21
Smith, James G. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S186000
Reexamination Certificate
active
06907805
ABSTRACT:
Open-end symmetrical wrenches retain fasteners fully seated in the jaws of the wrench. The jaws have fastener-engaging surfaces with substantially planar and parallel sections that extend past the front side corners of the fastener when it is fully seated in the wrench and serrated diverging sections extending outwardly and rearwardly from these planar sections. The serrated diverging section may be arcuate or a slightly inclined. Both types of diverging section are designed to reduce slipping and are connected to rear corners of the fastener-engaging cavity that are designed and positioned to avoid contact with the rear side corners of the fastener. Arcuate rear side corners of the wrench cavity avoid contact with the rear side corners of the fastener and avoid stress concentration points. The throat that connects the corners has two gentle curves or flat surfaces leading to a central arc. This modified “U” design provides more metal in the throat of the wrench, which stiffens the jaws.
REFERENCES:
patent: 996841 (1911-07-01), Dixon
patent: 3242775 (1966-03-01), Hinkle
patent: 4598616 (1986-07-01), Colvin
patent: 4882957 (1989-11-01), Wright et al.
patent: 5012706 (1991-05-01), Wright et al.
patent: 5117714 (1992-06-01), Pagac et al.
patent: 5148726 (1992-09-01), Huebschen et al.
patent: 5284073 (1994-02-01), Wright et al.
patent: 5381710 (1995-01-01), Baker
patent: 6145414 (2000-11-01), Hsieh
Wright Tool, 75thAnniversary Catalog 175, pp. 261, 262, Jan., 2002.
Milligan Kenneth R.
Wright Richard B.
Hochberg D. Peter
Mellino Sean
Smith James G.
Vieyra Katherine R.
Wright Tool Company
LandOfFree
Wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wrench will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3484636