Ergonomic knife and knife handle

An ergonomically efficient implement handle comprising:

• a rigid longitudinally extending, arcuate rib adapted to be firmly grasped by the hand and fingers of a user, said rib extending between an anterior end adapted to be coupled to an implement and a spaced-apart posterior end;
• an arch for aiding in the manipulation of said handle, said arch extending approximately from said anterior end at one side of said rib to an opposite side of said rib at said posterior end, said arch having an inner surface generally conforming to the natural curve of the user's hand, and said arch defining an orifice between itself and said rib penetrated by the user's thumb and a portion of the user's palm;
• an anterior hook associated with the anterior of said rib adapted to contact the index finger of a user for aiding in the thrusting of said handle;
• and,
• a posterior hook associated with rear of said rib for contacting the rear of the user's hand thereby aiding in the pulling of said handle without requiring the clasping of the fingers.

An ergonomically efficient knife comprising:

• a rigid arcuate rib adapted to be firmly grasped by the hand and fingers of a user, said rib extending between an anterior end and a spaced-apart posterior end;
• and,
• a blade extending forwardly from said rib anterior end;
• an arch for aiding in the manipulation of said knife, said arch extending approximately from said rib anterior end at one side of the said rib to an opposite side of said rib at said posterior end, said arch having an inner surface generally conforming to the natural curve of the user's hand, and said arch defining an orifice between itself and said rib penetrated by the user's thumb and a portion of the user's palm.

An ergonomically efficient handle for manipulating attached implements, said handle comprising:

• a rigid arcuate, longitudinal rib adapted to be grasped by the hand of a user, said rib extending between an anterior end adapted to be coupled to said implement and a spaced apart posterior end;
• a thumb rest disposed upon said anterior end adapted to be contacted by the thumb of a user for facilitating the downward transfer of force when said handle is used;
• an anterior hook disposed at the anterior end of said rib adapted to be contacted by the index finger of the user to aid in thrusting said implement;
• a posterior hook disposed at the posterior end of said rib for aiding in the pulling of said implement;
• an integral, arcuate arch for aiding in the manipulation of said handle, said arch extending from one side of said rib at said rib anterior end over and around the hand of the user to an opposite side of said rib at said posterior end, said arch having an interior surface generally conforming to and adapted to be contacted by the naturally curved top surface of the user's hand when the handle is used, and said arch defining an orifice between itself and said rib through which the user's thumb and a portion of the user's palm is extended when grasping the handle;
• and,
• wherein when rotary forces are directed from the base of the user's ring finger through the hypothenar muscles to the lateral side of the user's elbow, inward knife rotation forces the palmar surface of the thumb and the posterior-medial border of the hand into contact with the arch inner surface, and outward rotation of the knife forces the anterior-medial border and the posterior surface of the proximal and distal phalanges of the thumb into contact with the arch.

An ergonomically efficient knife comprising:

• a rigid arcuate rib adapted to be firmly grasped by the hand and fingers of a user, said rib extending between an integral anterior end an integral, spaced apart posterior end;
• a blade extending forwardly from said rib anterior end;
• a rigid arcuate arch for aiding in the manipulation of said handle, said arch extending approximately from said anterior end at one side of the rib to an opposite side of the rib at said posterior end, said arch having an inner surface generally conforming to the natural curve of the user's hand, and said arch defining an orifice between itself and said rib penetrated by the user's thumb and a portion of the user's palm, whereby the arch contacts the palmar surface of the thumb and the posterior-medial border of the hand during inward rotation, and the anterior-medial border and the posterior surface of the proximal and distal phalanges of the thumb during outward rotation;
• a thumb rest associated with the anterior end of said rib adapted to be contacted by the thumb of the user for facilitating the downward transfer of force when said knife is used.