Locking device for use with a utility knife
OwnerRichard Huanginventor
Life of this patent
Estimating the term…
Abstract
A utility knife is provided with a feature of easy replacement of the blade and a characteristic that the utility knife body halves are prevented from separating from each other. The utility knife has a lock which is able to enhance the assembly between the body halves, such that the user is able use the knife without worrying the two halves will separate with each other and endanger the user. The locking device has a retainer movably engaged with an inclined top face of a pressing stop, such that the retainer is forced to move. When the retainer moves, an extension is then alternatively and movably received in a receiving hole in the retainer to alternatively assemble the two halves.
Claims5
A utility knife with a locking device comprising:
- a casing composed of a first half cover, a second half cover pivotally connected with the first half cover, a pushbutton movably mounted on top of the casing, and bracket integrally formed with the pushbutton for receiving therein a blade, wherein
- the first half cover has an elongate path defined in a mediate portion thereof, spaced apart walls on two opposite sides of the path, a seat formed at an end of the path, a first spring securely mounted on a rear portion thereof, a first cutout with a pivot hole and a sliding seat formed in a front portion thereof for receiving therein an extension;
- the second half cover has a pressing top provided with an inclined top face and formed on a mediate portion thereof, a chamber formed adjacent a rear portion thereof for storing spare blades therein and a second cutout defined in a rear end thereof and having a shaft engaging the pivot hole of the first cutout;
- and
- a retainer detachably engaged with the pressing stop and securely connected with an extension such that, when the retainer moves, the extension moves in a receiving trough defined in the stop.
Dependencies are inferred from the claim text.