US 6,148,522 AGranted

Dual-blade utility knife

OwnerFrank Dobandiinventor

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Abstract

A dual blade utility knife that includes double-ended, retractable, separately actuatable cutting blades, one at each end, permitting extension of only one blade at a time, mounted in a non-complex housing unit that allows ready access through individual access panels to exchange and replace a single end blade when necessary. The utility tool is also capable of using the same type of blade at each end or different types of blades and dual-faced blades so that each blade can be reversed for extending the life and use of the tool between blade changes.

Claims2

Dependent claims

A dual blade utility knife comprising:

a pair of utility blades independently movable;
a narrow, hand-grippable housing having a first elongated blade receptacle body having two mirror image compartments, one at each end of said body, said body being mirror-imaged along its longitudinal center line forming a Z-shaped single housing body which is capable of receiving said utility blades, one at each end, said housing body including two additional body blade compartment covers identically shaped, each additional body blade compartment covers identically shaped, each cover mountable and removably attachable by a fastening means to said housing body for covering said blades, said housing body and said housing blade covers each forming an opening slot at each end of said housing body which allows a blade mounted within the blade cover to be moved and extended outwardly through said slot, said housing body including longitudinal top openings each having a recess, blade cover fasteners for removably connecting said blade covers to said housing body, first and second blade actuators for individually moving each blade independently, each blade actuator connected to a different blade, said blade actuators removably connected to said blades and each actuator having an actuating knob that connects to the actuator, and first and second blade restraining means;
said first and second blade restraining means including an elliptical band encircling said first and second blade actuators permitting independent movement of each of said first and second blades while preventing first and second blade extension simultaneously from said housing, said first blade being longitudinally movable relative to said housing body within said first blade compartment and said second blade being longitudinally movable within said second compartment, said first blade and said second blade each being accessible upon removal of within said blade compartment to a second position extending out of said housing for actuation and use of the blade, said second blade be movable to and from a first position inside said blade compartment to a position outside said compartment in a second position, said first and second actuators being restrained by said blade restraining means to prevent outward projection from said housing of both of said first and second blades at the same time.

Dependencies are inferred from the claim text.

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Abstract

A dual blade utility knife comprising:

a pair of utility blades independently movable;
a narrow, hand-grippable housing having a first elongated blade receptacle body having two mirror image compartments, one at each end of said body, said body being mirror-imaged along its longitudinal center line forming a Z-shaped single housing body which is capable of receiving said utility blades, one at each end, said housing body including two additional body blade compartment covers identically shaped, each additional body blade compartment covers identically shaped, each cover mountable and removably attachable by a fastening means to said housing body for covering said blades, said housing body and said housing blade covers each forming an opening slot at each end of said housing body which allows a blade mounted within the blade cover to be moved and extended outwardly through said slot, said housing body including longitudinal top openings each having a recess, blade cover fasteners for removably connecting said blade covers to said housing body, first and second blade actuators for individually moving each blade independently, each blade actuator connected to a different blade, said blade actuators removably connected to said blades and each actuator having an actuating knob that connects to the actuator, and first and second blade restraining means;
said first and second blade restraining means including an elliptical band encircling said first and second blade actuators permitting independent movement of each of said first and second blades while preventing first and second blade extension simultaneously from said housing, said first blade being longitudinally movable relative to said housing body within said first blade compartment and said second blade being longitudinally movable within said second compartment, said first blade and said second blade each being accessible upon removal of within said blade compartment to a second position extending out of said housing for actuation and use of the blade, said second blade be movable to and from a first position inside said blade compartment to a position outside said compartment in a second position, said first and second actuators being restrained by said blade restraining means to prevent outward projection from said housing of both of said first and second blades at the same time.