Utility knife with improved safety feature

A utility knife having an improved safety feature, comprising:

• first and second blades of different types;
• a handle which includes a pair of elongated mateable handle elements, one of said handle elements having a pair of blade-engaging units, one near each end thereof;
• blade-securing means disposed near one end only of the other handle element;
• and
• means for removably mating said handle elements with a blade mounted in one of said blade-engaging units, whereby said blade-securing means secures said blade and the absence of a blade-securing means at the other end of said other handle element prevents securing of another blade at said other end.

A utility knife suitable for mounting at least two different types of blades and having an improved safety feature, comprising:

• a handle which includes a pair of elongated mateable handle elements, each of said handle elements having a blade-engaging unit at an end thereof;
• blade-securing means at the other end of one of said handle elements;
• an obstruction mounted at the other end of the other of said handle elements;
• and
• means for removably mating said handle elements with a blade mounted between the blade-engaging unit of said other handle element and either the blade-engaging unit or the blade-securing means of said one handle element, whereby the obstruction at the other end of said other handle element prevents securing of another blade at said other end.

A utility knife having an improved safety feature, comprising:

• first and second blades of different types;
• a handle which includes a pair of elongated mateable handle elements, each of said handle elements having a blade engaging unit at an end thereof;
• blade-securing means at the other end of one of said handle elements;
• an obstruction mounted at the other end of the other of said handle elements;
• and
• means for removably mating said handle elements with a blade mounted between the blade-engaging unit of said other handle element and either the blade-engaging unit or the blade-securing means of said one handle element, whereby the obstruction at the other end of said other handle element prevents securing of another blade at said other end.