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US 4,048,760 AGranted
Scissors sharpener
OwnerFred R. Gangelhoffinventor
Life of this patent
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OwnerFred R. Gangelhoffinventor
Estimating the term…
A pair of slightly peripherally overlapped and axially spaced rotary grinding members are provided and journalled for rotation about generally parallel axes of rotation. The peripheral portions of the remote axial faces of the grinding members are oppositely bevelled and rotary torque producing structure is provided and drivingly coupled to the grinding members for driving the latter in opposite directions of rotation. Further, structure is provided defining oppositely facing substantially co-planar bearing surfaces on opposite sides of and disposed substantially normal to a plane normal to the axes of rotation of the rotary grinding members and disposed between the overlapped portions of the rotary grinding members. The bearing surfaces are disposed in generally equal chord planes of the rotary grinding members spaced substantially equally from and paralleling the axes of rotation of the rotary grinding members.
Scissors sharpener including a pair of slightly peripherally overlapped and axially spaced grinding members, means journaling said grinding members for rotation about generally parallel axes of rotation, said rotary grinding members including remote axial faces having outer peripheral oppositely bevelled portions, rotary torque input means drivingly connected to said grinding members for driving the latter in opposite directions, means defining oppositely facing bearing surface portions on opposite sides of a first plane normal to said axes and disposed between the overlapped portions of said grinding members, said bearing surface portions being disposed substantially in a second plane containing said axes and lying substantially in a third plane normal to said first and second planes and generally bisecting the peripherally overlapped portions of said grinding members.
Scissors sharpener including a pair of slightly peripherally overlapped and axially spaced grinding members, means journaling said grinding members for rotation about generally parallel axes of rotation, said rotary grinding members including remote axial faces having outer peripheral oppositely bevelled portions, rotary torque input means drivingly connected to said grinding members for driving the latter in opposite directions, means defining oppositely facing substantially co-planar bearing surface portions on opposite sides of and disposed substantially normal to a plane normal to said axes and disposed between the overlapped portions of said grinding members, said bearing surface portions being disposed in generally equal chord planes of said rotary grinding members spaced substantially equally from and paralleling said axes.
Scissors sharpener including a pair of slightly peripherally overlapped and axially spaced grinding members, means journaling said grinding members for rotation about generally parallel axes of rotation, said rotary grinding members including remote axial faces having outer peripheral oppositely bevelled portions, rotary torque input means drivingly connected to said grinding members for driving the latter in opposite directions, said sharpener including an upright structural wall from which said rotary grinding members are journaled for rotation about upstanding axes spaced outwardly of one side of and adjacent the upper marginal edge portion of said wall, said wall having a horizontal opening formed therethrough below the level of said grinding members for receiving the free end portion of a scissors blade therethrough when the base end portion of the blade is engaged with the lower overlapped grinding member portion.
Dependencies are inferred from the claim text.