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US 4,936,014 AGranted
Utility knife
AssigneeJohnson Level and Tool (Canada) Inc.
InventorsGad Shaanan, Imre Grosz, Serge Provost
Life of this patent
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AssigneeJohnson Level and Tool (Canada) Inc.
InventorsGad Shaanan, Imre Grosz, Serge Provost
Estimating the term…
A utility knife comprises a hollow casing formed by a pair of elongated members pivotally mounted one to the other at one end of the casing. A blade passage is provided at another end of the casing. The elongated members are adapted for movement in substantially parallel planes between aligned closed functional and open diverging positions. The casing is provided with a mechanism adapted to carry and selectively position a blade. The utility knife further comprises a locking member pivotally mounted to one of the elongated members and adapted in a closed position thereof to secure the elongated members in their aligned closed position. A pin extending inwardly from one of the side arms of the locking member is adapted to cooperate with a camming surface provided on the other one of the elongated members in order that, upon rotational movement of the locking member away from the closed position thereof, the elongated members are forcedly divergingly pivoted one with respect to the other about the other end of the casing and away from the aligned closed position thereof. As the spreading of the elongated members has been initiated by the pivot of the locking member the manual spreading of the enlongated members towards the full open diverging blade removal and replacement position thereof is facilitated as well as reduced. The elongated members interlock at the blade passage to prevent the lateral spreading of the casing during use.
A utility knife comprising a hollow casing having a blade passage at one end thereof and including first and second elongated members pivotally mounted one to the other at another end of said casing for movement in substantially parallel planes between aligned closed functional and open diverging positions, said casing being provided with means adapted for carrying and selectively positioning a blade, said utility knife further comprising a locking member pivotally mounted to said first elongated member and adapted in one position thereof for securing said elongated members in said aligned closed position thereof, cooperating means being provided on said second elongated member and on said locking member and adapted upon a pivot of said locking member away from said one position thereof for divergingly moving said elongated members about said other end away from said aligned closed position thereof thereby facilitating manual spreading of said elongated members towards said open diverging position thereof.
A utility knife as defined in claim 25, wherein said one and said other one of said elongated members respectively correspond to said first and second elongated members and wherein said blade opening is defined in said second elongated member, thereby preventing said elongated members from being spread apart from said aligned closed position thereof unless the blade is in the retracted sheathed position thereof.
A utility knife comprising a handle member including elongated complementary carrier and cover portions having a blade passage at one end thereof and being pivotally joined at another end thereof, said carrier portion comprising a guided retractable blade carriage means adapted for receiving a blade, carriage positioning means being provided for selective longitudinal movement of the blade between a retracted sheathed position and at least one extended unsheathed position through said passage, said utility knife further comprising a locking member pivotally mounted to one of said carrier and cover portions and adapted in one position thereof for securing said portions in an aligned closed position thereof, cooperating means being provided on another one of said portions and on said locking member, said cooperating means being adapted upon a pivot of said locking member away from said one position thereof for moving said elongated portions from said closed position thereof partly towards an open diverging position thereof, thereby facilitating manual spreading of said elongated portions towards said open diverging position thereof.
A utility knife comprising a hollow casing having a blade passage at one end thereof and including first and second elongated members pivotally mounted one to the other at another end of said casing for movement between aligned closed functional and open diverging positions, said casing being adapted for carrying a blade, said utility knife further comprising a locking member pivotally mounted to said first elongated member and adapted in one position thereof for securing said elongated members in said aligned closed position thereof, cooperating means being provided on said second elongated member and on said locking member and adapted upon a pivot of said locking member away from said one position thereof for divergingly moving said elongated members about said other end away from said aligned closed position thereof.
Dependencies are inferred from the claim text.