Universal rip guide for circular saw
OwnerPhilip W. Hamptoninventor
Life of this patent
Estimating the term…
Abstract
A handheld circular saw incorporating an improved rip guide is illustrated which guarantees accurate cuts in the ripping of sheet workpieces. The guide is precisely clamped to the upper surface of a foot assembly of the circular saw. A guide member is slidably movable along the longitudinal length of a bar section of the guide and securely locked in a desired position where it assures that a workpiece can be cut to a precise width desired, as a result of the accuracy of alignment of a flat surface of the guide member which is precisely parallel to the plane of the circular saw blade, that is then moved flush along an edge of the workpiece being ripped.
Claims13
A handheld circular saw which comprises:
- a housing and foot assembly for positioning the saw on a workpiece to be cut,
- an electric motor disposed in said housing which includes a rotatable shalt,
- a circular saw blade attached to said shaft for cutting the workpiece,
- an adjustable guide removably attached to said foot assembly for precisely guiding cutting movement of said circular saw blade relative to an edge of the workpiece,
- said guide including
- a bar which is mounted parallel to the axis of said shalt, which bar is stepped at a location intermediate of its length to provide a flat upper section and a flat lower section which are aligned in a straight line,
- said flat lower section having a rectangular cross-section with upper and lower flat surfaces and flat side edge surfaces, and having a longitudinally extending groove formed therein which groove has a bottom surface,
- a holder which is slidably movable along said lower bar section, said holder including three interior surfaces that lie in close juxtanosition with said upper surface and both said side edge surfaces of said flat lower section,
- a guide member carried by said holder which includes means defining a straight line which can be slid along the workpiece edge,
- said holder and said flat lower section interengaging in a manner so that said means defining a straight line is maintained precisely perpendicular to said shaft axis;
- and
- said holder having a threaded hole extending therethrough and a clamping screw being threadably received in said hole so that a free end of said screw can be caused to tightly engage said bottom surface of said groove to precisely position said holder and its guide member at a desired longitudinal location along said bar;
- and
- means for removably mounting said flat upper bar section upon an upper surface of said foot assembly in a manner so that said bar is precisely parallel to said shaft axis.
An adjustable rip guide for use in combination with a handheld circular saw which includes a housing and foot assembly for positioning the saw on a workpiece to be cut, an electric motor disposed in said housing which drives a rotatable shaft, a circular saw blade attached to the shaft, and means for removably mounting an adjustable guide to the upper surface of said foot assembly, which guide comprises:
- an elongated bar which interengages with the mounting means so as to be mounted parallel to the axis of the shaft, said bar being stepped at a location intermediate of its length to provide a flat upper section and a flat lower section which are aligned in a straight line,
- said flat lower section having a rectangular cross-section with upper and lower flat surfaces and flat side edge surfaces, said upper surface of said flat low section having a longitudinally extending groove which has a bottom surface formed therein,
- a holder which is slidably movable along said flat lower section, said holder including three interior surfaces that lie in close juxtaposition said upper surface and both said side edge surfaces of said flat lower section,
- a guide member carried by said holder which includes means defining a straight line which can be slid along the workpiece edge, and
- said holder having a threaded hole extending therethrough and a clamping screw being threadably received in said hole so that a free end of said screw can be caused to tightly engage said bottom surface of said groove to precisely position said holder and its guide member at a desired longitudinal location side said bar,
- said holder and said flat lower section interengaging in a manner so that said means defining a straight line is maintained precisely perpendicular to the shaft axis;
- whereby when said upper bar section is removably mounted upon the upper bar surface of the foot assembly, said bar is precisely parallel to said shaft axis and said guide member precisely guides cutting movement of the circular saw blade relative to an edge of the workpiece.
Dependencies are inferred from the claim text.