Abstract: A brake operating device (30) is configured such that actuation of the brake lever (34) around the lever pivot (36) displaces the cable (38) in a direction transverse to the cable length toward the lever pivot (36), as the user is actuating the brake lever (34). This provides at least a 33% increase in mechanical advantage over the actuation range of the brake lever (34).

Abstract: There is disclosed herein an adapter system for use with a hand-held electrically-driven grinding tool, which rotatably drives a grinding wheel for removing grout or mortar from a work site. The adapter system is constructed to controllably deliver a liquid, usually water to the grinding wheel. The adapter system includes a valve assembly mounted to the tool body, which assembly includes: (1) a housing which defines an inlet and an outlet and (2) a shut off valve member positioned within the housing and between the inlet and outlet and operable from external of the housing to selectively provide and interrupt communication between the inlet and the outlet. There is also provided a supply conduit leading from a source and connected to the inlet for delivering liquid from the source to the valve housing inlet. A flexible delivery conduit is provided and connected to the valve housing and positionable adjacent to periphery of the grinding element.