Combination wrench with greater strength and torque
AssigneePlus Craft Industrial Co., Ltd.
InventorTimmy Chen
Life of this patent
Estimating the term…
Abstract
A combination wrench includes a shank, a first driving member mounted on a first end of the shank, and a second driving member mounted on a second end of the shank. The shank has different cross-sectional profiles and areas from the first driving member to the second driving member so that the shank has different thickness from the first driving member to the second driving member so as to correspond to different forces. Thus, the mediate portion of the shank has a uniform thickness and has greater strength and torque so as to withstand a larger force so that when a stress is concentrated on the mediate portion of the shank, the mediate portion of the shank can tolerate the stress, thereby preventing the shank from being deformed or broken due to an excessive force.
Claims9
A combination wrench comprising:
- a shank;
- a first driving member mounted on a first end of the shank;
- and
- a second driving member mounted on a second end of the shank, wherein:
- the shank has different cross-sectional profiles and areas from the first driving member to the second driving member;
- the shank has different thickness from the first driving member to the second driving member;
- the first driving member has an upper side, a lower side, a rightward side and a leftward side;
- the second driving member has an upper side, a lower side, a rightward side and a leftward side;
- the shank has an upper side extending from the upper side of the first driving member to the upper side of the second driving member;
- the shank has a lower side extending from the lower side of the first driving member to the lower side of the second driving member;
- the shank has a rightward side extending from the rightward side of the first driving member to the rightward side of the second driving member;
- the shank has a leftward side extending from the leftward side of the first driving member to the leftward side of the second driving member;
- the distance between the upper side of the shank and the lower side of the shank is decreased gradually from the first driving member to the second driving member;
- and
- the distance between the rightward side of the shank and the leftward side of the shank is increased gradually from the first driving member to the second driving member.
Dependencies are inferred from the claim text.