Retractable utility knife
First Claim
1. Retractable knife comprising an elongate handle defining a handle axis;
- a release button mounted for movements along said handle axis;
a blade holder slidingly mounted within said handle responsive to actuation of said release button for sliding movements along said handle between a retracted position and an extended position in which at least a portion of said blade holder extends beyond said handle and having an upper edge, receiving means within said blade holder for receiving at least a portion of a blade provided with one edge formed with a cutting edge and opposing edge formed with a notch; and
a manually operable blade lock formed on said portion of said blade holder and comprising a release member rotatably mounted on said blade holder, said release member having a first portion on said blade holder and mounted to be actuated by movement of a finger of the same hand of a user holding said handle along a direction substantially parallel to said handle axis, and a second portion mounted on said first portion for movements with said first portion between a locking position in which said second portion is received within a notch of a blade and a releasing position in which said second portion is removed from the blade notch to a position beyond the notch of the blade, said release member being substantially in the form of a disc having an axis of rotation substantially normal to said handle axis and rotatably mounted on said blade holder for rotation about said release member axis of rotation, said first portion at least partially projecting above said upper edge of said blade holder to always be exposed for engagement by the user in both said blade locking and blade releasing positions when said release member is actuated while said blade holder is extended along said handle axis beyond said handle at a position spaced from said release button in the direction of the blade to be removed, and biasing means for normally moving said release member to move said second portion to said locking position, whereby actuation of said release member by the finger of the user to overcome said biasing means moves said second portion to said releasing position for releasing the blade so that it can be withdrawn from said receiving means.
1 Assignment
0 Petitions
Accused Products
Abstract
A retractable knife includes an elongate handle and a blade holder slidingly mounted within the handle for sliding movements between a retracted position and an extended position. The blade holder is configured for receiving. A manually operable blade lock is formed on the holder and including a release member rotatably mounted on the blade holder. The release member having a first portion projecting beyond the handle and positioned to be actuated by a finger of a user while holding the handle. A second portion is movable with the first portion between a locking position in which the second portion is received with a notch of a blade and a releasing position in which the second position is removed from the blade notch to a position outside the notch of the blade. A spring normally rotates the release member to move the second portion to the locking position. Actuation of the release member by the finger of the user to overcome the spring moves the second portion to the releasing position and releases the blade.
287 Citations
26 Claims
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1. Retractable knife comprising an elongate handle defining a handle axis;
- a release button mounted for movements along said handle axis;
a blade holder slidingly mounted within said handle responsive to actuation of said release button for sliding movements along said handle between a retracted position and an extended position in which at least a portion of said blade holder extends beyond said handle and having an upper edge, receiving means within said blade holder for receiving at least a portion of a blade provided with one edge formed with a cutting edge and opposing edge formed with a notch; and
a manually operable blade lock formed on said portion of said blade holder and comprising a release member rotatably mounted on said blade holder, said release member having a first portion on said blade holder and mounted to be actuated by movement of a finger of the same hand of a user holding said handle along a direction substantially parallel to said handle axis, and a second portion mounted on said first portion for movements with said first portion between a locking position in which said second portion is received within a notch of a blade and a releasing position in which said second portion is removed from the blade notch to a position beyond the notch of the blade, said release member being substantially in the form of a disc having an axis of rotation substantially normal to said handle axis and rotatably mounted on said blade holder for rotation about said release member axis of rotation, said first portion at least partially projecting above said upper edge of said blade holder to always be exposed for engagement by the user in both said blade locking and blade releasing positions when said release member is actuated while said blade holder is extended along said handle axis beyond said handle at a position spaced from said release button in the direction of the blade to be removed, and biasing means for normally moving said release member to move said second portion to said locking position, whereby actuation of said release member by the finger of the user to overcome said biasing means moves said second portion to said releasing position for releasing the blade so that it can be withdrawn from said receiving means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a release button mounted for movements along said handle axis;
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18. Retractable knife comprising an elongate handle;
- defining a handle axis;
a release button mounted for movements along said handle axis;
a blade holder slidingly mounted within said handle responsive to actuation of said release button for sliding movements relative to said handle between a retracted position and an extended position in which at least a portion of said blade holder extends beyond said handle and having an upper edge, receiving means within said blade holder for receiving at least a portion of a blade provided with one edge formed with a cutting edge and opposing edge formed with a notch; and
a manually operable blade lock formed on said portion of said blade holder and comprising a release member rotatably mounted on said blade holder, said release member having a first portion on said blade holder and mounted to be actuated by movement of a finger of the same hand of a user holding said handle along a direction substantially parallel to said handle axis, and a second portion mounted on said first portion for movements with said first portion between a locking position in which said second portion is received within a notch of a blade and a releasing position in which said second portion is removed from the blade notch to a position beyond the notch of the blade, said release member being substantially in the form of a disc having an axis of rotation substantially normal to said handle axis and rotatably mounted on said blade holder for rotation about said release member axis of rotation, said first portion at least partially projecting above said upper edge of said blade holder to always be exposed for engagement by the user in both said blade locking and blade releasing positions when said release member is actuated while said blade holder is extended along said handle axis beyond said handle at a position spaced from said release button in the direction of the blade to be removed, and biasing means for normally moving said release member to move said second portion to said locking position, said blade holder being received within a longitudinal space or gap within said handle with little clearance, facing surfaces of said blade holder and handle being polished to minimize sliding friction, whereby actuation of said release member by the finger of the user to overcome said biasing means moves said second portion to said releasing position for releasing the blade so that it can be withdrawn from said receiving means. - View Dependent Claims (19)
- defining a handle axis;
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20. Retractable knife comprising an elongate handle;
- defining a handle axis;
a release button mounted for movements along said handle axis;
a blade holder slidingly mounted within said handle responsive to actuation of said release button for sliding movements relative to said handle between a retracted position and an extended position in which at least a portion of said blade holder extends beyond said handle and having an upper edge, receiving means within said blade holder for receiving at least a portion of a blade provided with one edge formed with a cutting edge and opposing edge formed with a notch; and
a manually operable blade lock formed on said portion of said blade holder and comprising a release member on said blade holder, said release member having a first portion rotatably mounted on said blade holder and mounted to be actuated by movement of a finger of the same hand of a user holding said handle along a direction substantially parallel to said handle axis, and a second portion mounted on said first portion for movements with said first portion between a locking position in which said second portion is received within a notch of a blade and a releasing position in which said second portion is removed from the blade notch to a position beyond the notch of the blade, said release member being substantially in the form of a disc having an axis of rotation substantially normal to said handle axis and rotatably mounted on said blade holder for rotation about said release member axis of rotation, said first portion at least partially projecting above said upper edge of said blade holder to always be exposed for engagement by the user in both said blade locking and blade releasing positions when said release member is actuated while said blade holder is extended along said handle axis beyond said handle at a position spaced from said release button in the direction of the blade to be removed, and biasing means for normally moving said release member to move said second portion to said locking position, said handle having a thickness or width in a direction normal to said axis that is approximately 0.5″
, whereby actuation of said release member by the finger of the user to overcome said biasing means moves said second portion to said releasing position for releasing the blade so that it can be withdrawn from said receiving means. - View Dependent Claims (21, 22, 23, 24, 25)
- defining a handle axis;
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26. Retractable knife comprising a generally slim elongate handle having an upper edge generally proximate to the thumb of a user when held during normal use;
- defining a handle axis;
a release button mounted for movements along said handle axis;
a blade holder slidingly mounted within said handle responsive to actuation of said release button for sliding movements relative to said handle between a retracted position and an extended position in which at least a portion of said blade holder extends beyond said handle and having an upper edge, receiving means within said blade holder for receiving at least a portion of a blade provided with one edge formed with a cutting edge and opposing edge formed with a notch;
a manually operable blade lock formed on said portion of said blade holder and comprising a rotatably mounted release member mounted on said blade holder, said release member having a first portion on said blade holder and mounted to be actuated by movement of a finger of the same hand of a user holding said handle along a direction substantially parallel to said handle axis, and a second portion mounted on said first portion for movements with said first portion between a locking position in which said second portion is received within a notch of a blade and a releasing position in which said second portion is removed from the blade notch to a position beyond the notch of the blade, said release member is substantially in the form of a disc having an axis substantially normal to said handle axis and rotatably mounted on said blade holder for rotation about said axis of rotation, said first portion at least partially projecting above said upper edge of said blade holder to always be exposed for engagement by the user in both said blade locking and blade releasing positions when said release member is actuated while said blade holder is extended along said handle axis beyond said handle at a position spaced from said release button in the direction of the blade to be removed, and biasing means for normally moving said release member to move said second portion to said locking position, said handle being formed with a gap or slot along at least a portion of said upper edge; and
a release button extending above said upper edge and coupled to said blade holder, whereby actuation of said release button by the thumb of the user to slidingly move said blade holder while holding said handle slidably moves said blade holder between said retracted and extended positions.
- defining a handle axis;
Specification