Knife with removable blades

A knife comprising:

• an elongated blade comprising a cutting end having a sharpened edge extending along at least one side and a tang formed with sides extending generally away from said cutting end, and also having a recess extending into one side thereof, said tang formed at the end thereof remote from said blade cutting end with an angled surface;
• said blade including a pair of inwardly and forwardly angled shoulders on either side of said tang;
• a handle including grip portions and a socket at a forward end adapted to slidably receive said tang, said socket including a fixed angled surface aligned with said tang and adapted to mate with said tang angled surface upon full insertion of said tang in said handle socket;
• and also including a pair of angled shoulders on said forward end of said handle adjacent said socket, and configured to be brought into mating engagement with said angled shoulders on said blade with said tang fully inserted in said socket;
• an elongated locking plate and a pivotal mount pivotally mounting said locking plate to said handle at a point intermediate the length of the locking plate to allow limited pivoting motion between locking and releasing positions;
• said locking plate including a forward locking end and a rear-end, said locking end on a side adjacent to said socket, and formed with a locking tab configured to be moved downward into mating relationship with said recess in said tang, with said tang fully inserted in said socket;
• spring bias means urging said locking plate to said locked position;
• whereby said blade may be released by pivoting said locking plate rear-end to release position against the resistance of said spring bias means.