Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Reexamination Certificate
2000-08-21
2001-12-25
Banks, Derris H. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
C081S489000, C081S060000, C081S061000, C081S063200
Reexamination Certificate
active
06332380
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to hand tools, particularly wrenches and more particularly ratcheting and adjustable type wrenches. The present invention may also apply to other known wrenches including open end, box end, flare nut, etc.
BACKGROUND OF THE INVENTION
Typically, most wrenches have handles or gripping portions which are relatively thin. Accordingly, the gripping portions of most wrenches tend to promote user discomfort and fatigue. In addition, most wrenches have relatively long handles or gripping portions which detract from the balance and control of the tool. There have been some attempts to improve wrench comfort, balance and control, however, most attempts have included the use of a wrench grip derived from other applications thereby minimizing the affect of any improvement.
SUMMARY OF THE INVENTION
The present invention involves a unique wrench with an elliptically shaped gripping means that is formed with critical features and dimensional relationships which significantly affect the comfort, balance, torque and control of the wrench.
More particularly, the present invention involves a wrench for turning nuts, bolts and various fasteners. The wrench has a predetermined entire length and comprises a wrench head or driving portion which has a predetermined length and an axis of wrench rotation, and, a gripping portion which has dimensions of length greater than width, and width greater than thickness. The gripping portion is formed elliptically shaped as viewed from a top view and elongated in shape as viewed from an end view. The gripping portion is further formed with a length relative to the entire length of the wrench and the length of the wrench head, whereas, the length of the gripping portion is about equal to, the entire length of the wrench minus the length of the wrench head. Preferred embodiments of the present invention include a ratchet wrench with a ratcheting mechanism in the wrench head, and, an adjustable type wrench with an adjustable, open ended wrench head.
The present invention has been developed recognizing the deficiencies of known wrenches including lack of comfort, torque capacity, balance and control.
Accordingly, it is an important objective of the present invention described above to provide for a wrench with a unique gripping portion that can enhance comfort, so that a user may attain higher levels of torque than that of a standard wrench of equal or greater size.
It is another objective of the present invention described above to provide for a wrench with a unique gripping portion that can enhance balance and control.
It is another objective of the present invention that it be commercially viable, simple in design, and cost efficient to manufacture.
REFERENCES:
patent: D. 42321 (1912-03-01), Gilbert
patent: 626867 (1899-06-01), Mass
patent: 1424045 (1922-07-01), Sprague
patent: 1506331 (1924-08-01), Benko
patent: 1797446 (1931-03-01), Salmon
patent: 2247521 (1941-07-01), Pierce
patent: 3175436 (1965-03-01), Coleman
patent: 5062327 (1991-11-01), Hammons et al.
patent: 5884539 (1999-03-01), Baker
patent: 6094781 (2000-08-01), Jansson et al.
Banks Derris H.
McDonald Shantese
Proprietary Technologies, Inc.
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