Pivoting securing device for a utility knife blade
A utility knife include a handle, a neck pivotally mounted on the handle, and a blade mounted in the neck. The neck can be folded into the handle to transport the utility knife. The blade is slidably removably inserted into and out of the handle without requiring disassembly of the handle. The blade is secured to the neck of the knife by a pivotally mounted arm.
1 . A utility knife including
(a) a handle having a first end, and a second end;
(b) a neck having a distal end and having a proximate end;
(c) a blade mounted on said distal end, said blade including
(i) a base,
(ii) an upper edge opposed to and spaced apart from said base,
(iii) a cutting edge extending along said base, and wherein said blade further includes an anchor opening formed through said blade, a portion of said cutting edge extending into said distal end and a portion of said cutting edge extending outwardly from said distal end of said neck
(d) a fastener pivotally attaching said proximate end to said first end such that said neck can be moved between two positions,
(i) a first open unfolded operative position with said cutting edge exposed for use to cut an object, and
(ii) a second closed folded position with said cutting edge stored adjacent said handle; and,
(e) a locking mechanism comprising
(i) a pivot arm connected to said neck, said pivot arm having a distal end and having a proximate end;
(ii) an anchor opening in said blade;
(iii) an anchor opening engaging feature movable with said pivot arm to selectively release or retain said blade.
2 . The utility knife of claim 1 wherein said pivot arm attaches substantially parallel to said neck and the locking mechanism further comprises:
a spring biasing said pivot arm in one of a blade retaining or blade releasing position; and
a pivot arm actuator at said proximate end of said pivot arm operable to one of selectively engage or disengage said blade engaging feature at said distal end of said pivot arm.
3 . The utility knife of claim 2 wherein said actuator is manually operable by at least one of depressing, pulling, lifting, sliding, pivoting, or rotating action.
4 . A utility blade insert locking mechanism on a folding utility knife comprising a lever arm configured to restrict a removable, uniform thickness blade from disassociation with the knife body.
5 . The locking mechanism of claim 4 further comprising:
a spring biasing said lever arm in one of a blade retaining and blade releasing position; and
an actuator operable to overcome said biasing spring.
6 . The locking mechanism of claim 4 further comprising:
a spring biasing said lever arm in one of a blade retaining and blade releasing position; and
an actuator in communication with said lever arm, operable to displace at least one end of said lever arm to release said removable blade insert.
7 . The locking mechanism of clam 6 wherein said spring at least one of emanates from, is integral with and is seated in said lever arm.
8 . The locking mechanism of clam 6 wherein said spring at least one of emanates from, is integral with and is seated in said knife body.
9 . The locking mechanism of clam 6 wherein said spring is retained between said lever arm and said knife body.
10 . The locking mechanism of clam 6 wherein said spring is seated in one of said lever arm, said actuator and said knife body.
11 . The locking mechanism of claim 6 wherein said manual actuator depends from said lever arm to at least one side of the plane defined by the pivoting longitudinal axis of said lever arm.
12 . The locking mechanism of claim 5 wherein said actuator is generally aligned with the pivoting longitudinal axis of said lever arm and is depressable into a recess formed in said knife body.
13 . The locking mechanism of claim 6 wherein said manual actuator is a slider, operable to displace at least one end of said lever arm.
14 . The locking mechanism of claim 4 wherein said lever arm is a resilient lever arm, said locking mechanism further comprising:
a blade engaging feature depending from said resilient lever arm; and
an actuator configured to temporarily deform said resilient lever arm disengaging said blade engaging feature.