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US 8,615,888 B2Granted
Impaired grip knife
AssigneeDexter-Russell, Inc.
InventorsCarol Catalano, Aaron Double
Life of this patent
Estimating the term…
Abstract
A knife has a handle with an enlarged proximate end grip portion having ribbed and unribbed surfaces. The handle has oppositely disposed thumb receiving concave unribbed surfaces at the distal end for alternate pinch-grip functions. The knife blade has a cutting edge that extends proximately below and adjacent the enlarged grip portion, and is proximately disposed with respect to the thumb receiving pinch-grip concave surfaces. The knife provides diverse impaired grip cutting functions with comfort and with fatigue.
Claims16
A knife for a user having an impaired grip, said knife comprises:
- a handle comprising, a thermoplastic body comprising a ribbed portion and an unribbed portion;
- and
- a blade fixedly disposed said handle, said blade comprises an upper edge and a lower edge, said blade lower edge comprises a cutting edge comprising a proximate end portion;
- said handle further comprises a proximate end and a distal end, oppositely disposed sides, an upper surface portion and a lower surface portion, said sides are more outwardly disposed at the proximate end than at the distal end;
- said blade cutting edge extends proximately to a position beneath the handle lower surface portion, said lower surface comprises a convex surface adjacent to the proximate end of the handle and a concave surface adjacent to the distal end of the handle;
- said ribbed portion comprises an upper portion and a lower portion, said upper ribbed portion comprises a first thumb engaging recessed surface in a first cutting position;
- and
- said sides comprise second and third recessed surfaces distally disposed from said first recessed surface, said first recessed surface being disposed over the cutting edge proximate end portion of the cutting edge;
- said blade cutting edge extends proximately to an end point and then extends distally to a point immediately adjacent the second and third recessed surfaces and the lower concave surface;
- whereby the user with an impaired grip grips the handle and effectively cuts with the knife blade.
7 more elements
A knife for impaired grip use comprising:
- a handle comprising a proximate end, a distal end, an upper surface, a lower surface, and oppositely disposed side surfaces, said handle lower surface comprises a convex surface adjacent to the proximate end and a concave surface adjacent to the distal end of the handle;
- said handle comprises a grip portion having an enlarged proximately disposed portion having a sectional area larger than the distally disposed sectional area, said handle further comprises a first recess disposed in said upper surface for a first grip position, and further comprising oppositely disposed second and recesses disposed in respective side surfaces adjacent the handle distal end, said second and third recesses being distally disposed from said first recess;
- and
- a blade fixedly disposed in said handle, said blade comprises an upper edge and a lower edge, said blade lower edge comprises a cutting edge that extends proximately and disposed directly below the enlarged proximately disposed handle grip portion, said blade cutting edge extends proximately to a proximate end point disposed below the handle lower surface and then extends distally to a point immediately adjacent the second and third recesses and the lower concave surface;
- whereby the impaired grip user grips the handle in one of the first or second grip positions and effectively cuts with the blade.
2 more elements
A knife handle for impaired grip use comprising:
- a proximate end, a distal end, an upper surface, a lower surface, and oppositely disposed sides;
- said lower surface comprises a convex surface adjacent to the proximate end and a concave surface adjacent to the distal end of the handle, said handle comprises a grip portion having a proximately disposed enlarged portion being enlarged from the upper surface to the lower surface and being outwardly enlarged from one side to the other side, each outwardly enlarged and proximately disposed side comprises a convex curvature extending from the upper surface to the lower surface and further comprising a first thumb receiving recess in the upper surface, said sides comprise respective second and third recesses, said second and third recesses being distally disposed from said first recess, said enlarged portion comprises ribbed and unribbed surfaces, said blade cutting edge extends proximately to a proximate end point disposed below the handle lower surface and then distally to a point immediately adjacent the second and third recess and the lower concave surface;
- whereby an impaired grip user comfortably grips the handle.
Dependencies are inferred from the claim text.