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US 2004/0068874 A1Published application
Clasp knife
OwnerChi-Tung Chuinventor
Life of this patent
Estimating the term…
Abstract
A clasp knife is composed of a handle and a blade pivotally mounted on the handle. The handle has a fastening member and a locking member provided therein. The blade has a taper hole, a tongue slot, and a locking surface. When the blade is received in the handle, the fastening member is positioned in the taper hole and the locking member can abut the locking surface of the blade, so that the blade cannot be freely pivoted outwards to extend from the handle without the operation of the user. When the blade is extended, the locking member can be inserted in the tongue slot to prevent the blade from freely pivoting.
Claims10
A clasp knife comprising:
- a handle (10) being composed of a first part (111) and a second part (11) assembled together, and having a gap between the first part (111) and the second part (11) for receiving a blade (20), the second part (11) having a pivot pin (12) provided at a front end of the second part (11), and a flexible sheet (13) located in the gap of the handle (10) and adjacent an inner side of the second part (11) by which the blade (20) is received in the handle (10), the flexible sheet (13) having a fixed end away from the pivot pin (12) secured on the second part (11) and a free end adjacent the pivot pin (12);
- the blade (20) pivotally mounted between the first part (111) and the second part (11), and having a cutting edge, a back opposite to the cutting edge, an installed portion (21) pivotally mounted on the pivot pin (12), and a taper hole (25) tapered from a bottom surface to a top surface of the blade (20) defined through the installed portion (21), the free end of the flexible sheet (13) abutting a rear end of the installed portion (21) when the blade (20) is extended;
- a torsional spring (30) provided outside the pivot pin (12), the torsional spring (30) having two free ends respectively secured on the second part (11) of the handle (10) and the installed portion (21) of the blade (20);
- a fastening member (33) provided in the second part (1) and attached in the taper hole (25) when the blade (20) is received in the handle (10) to fasten the blade (20);
- and
- a locking member (40) movably mounted at an outer side opposite to the inner side of the second part (11) for locking the blade (20), which prevents the blade (20) from freely pivoting without an operation of a user.
3 more elements
Dependencies are inferred from the claim text.