Articulated screwdriver
OwnerTzung-Yen Yanginventor
Life of this patent
Estimating the term…
Abstract
An articulated screwdriver has a handle and a shank secured on the handle. The shank has a ball-end formed at a free end thereof, and an outer thread formed on an outer periphery close to the free end. A joint sleeve has a joint formed at a first end thereof and an opening defined at a second end. The ball-end is pivotally mounted in the opening. A positioning sleeve screwed on the shank has an inner thread engaged with the outer thread. Whereby, when the positioning sleeve is moved forwards to enter the opening, the shank is unable to be pivoted about the joint sleeve and when the positioning sleeve is distant from the opening the joint sleeve is able to pivot relative to the shank.
Claims6
An articulated screwdriver comprising:
- a handle (10);
- a shank (20) secured on the handle (10), the shank (20) having a free end (21) and an outer thread (22) formed on an outer periphery close to the free end (21);
- a joint sleeve (30) having a joint (31) formed at a first end thereof and an opening (32) defined at a second end thereof, the free end (21) of the shank (20) being pivotally received in the opening (32);
- and
- a positioning sleeve (40) screwed on the shank (20), the positioning sleeve (40) having an inner passage including an inner thread (41) engaged with the outer thread (22) and of a size smaller than and for abutting with the free end (21), with the positioning sleeve having a front end including an outer diameter smaller than and for receipt in a diameter of the opening (32),
- whereby, when the front end of the positioning sleeve (40) is inserted in the opening (32), a longitudinal axis of the shank (20) rigidly aligns with a longitudinal axis of the joint sleeve (30) and the shank (20) is unable to be pivoted about the joint sleeve (30), and when the front end of the positioning sleeve (40) is distant from the opening (32) the joint sleeve (30) is pivotable relative to the longitudinal axis of the shank (20).
Dependencies are inferred from the claim text.