Patent ID: 6532853
Filing Date: 2003-03-18
Classification: B23D,B27B,Y10T

Abstract:
A table-top cutting machine, comprising:a base having a front and an oppositely disposed rear; a circular saw main unit supported by the base and including a saw blade mounted thereon with a drive unit that rotates the saw blade about an rotation axis, the saw blade having an initial horizontal rotation axis and a planar surface that defines an initial vertical plane, the circular saw main unit being movable along the plane of the saw blade position and also being pivotable to incline the saw blade relative to horizontal; an inclination locking mechanism for at least temporarily maintaining a selected inclination of the saw blade, the inclination locking mechanism having an inclination locking operating handle disposed proximate the front of the base; an inclination locking shaft having an axis of rotation and connecting the inclination locking operating handle to the inclination locking mechanism, an inclination stopping mechanism for maintaining the saw blade in a vertical plane, the inclination stopping mechanism having an inclination stopping operating handle disposed proximate the front of the base; an inclination stopping shaft having an axis of rotation and connecting the inclination stopping operating handle to the inclination stopping mechanism; a turntable having a front and an oppositely disposed rear, being disposed between the base and the circular saw main unit, and being rotatably supported by the base about a vertical turntable rotation axis, the circular saw main unit being supported by the turntable and being revolvable therewith, a turntable locking mechanism for at least temporarily maintaining a selected rotational position of the turntable, the turntable locking mechanism having a turntable locking operating handle disposed proximate the front of the turntable and the inclination locking operating handle; a turntable locking shaft connecting the turntable locking operating handle to the turntable locking mechanism; a bracket rotatably connected to the rear of the turntable with a support pin having a central axis that extends parallel to and is spaced from the inclination locking shaft, the bracket having at one end thereof a planar and circular contact surface that is perpendicular to the central axis of the support pin and rotatable thereabout relative to a corresponding contact surface on the rear of the turntable, the bracket having an arcuate slot through an arc of which is centered on the central axis of the support pin, the rear of the turntable having an internally threaded aperture extending therethrough to engageably receive an externally threaded portion of the inclination locking shaft so that a rotation of the inclination locking operating handle moves the inclination locking shaft in a direction along its axis of rotation, the inclination locking shaft further extending through the arcuate slot in the bracket; a stopper ring attached to an end of the inclination locking shaft that extends through the arcuate slot, the stopper ring having a larger diameter than a radical thickness of the arcuate slot so that, when the threaded inclination locking shaft is rotated in one direction, the stopper ring pulls the contact surface of the bracket against the corresponding contact surface on the rear of the turntable, thereby preventing the bracket from being rotated about the central axis of the support pin; and first and second links pivotally connected at one of each of their ends to the bracket at the same pivotal point and at the other of each of their ends to the circular saw main unit at separate pivot points to provide support for the circular saw main unit while allowing the latter to be moved in a generally horizontal direction in the plane of the saw blade, the circular saw main unit being revolvable about the central axis of the support pin when the inclination locking shaft is rotated by turning the inclination locking operating handle at the front of the turntable so that the stopper ring is not pulling the contact surface of the bracket against the corresponding contact surface on the rear of the turntable.