Abstract: A brake system for a movable cart, such as a tool cart or the like, including a brake mechanism for inhibiting rotation of at least one wheel of the cart, a brake release mechanism, and an actuator for manually actuating the brake release mechanism. The brake mechanism includes a lever arm pivotally coupled to the cart and having first and second portions disposed on opposite sides of a pivot axis. The lever arm has a braked position wherein the first portion is pressure-loaded against the cart wheel to inhibit rotation of the wheel. The brake release mechanism includes a cam member rotatably coupled to the frame and disposed adjacent the second portion of the lever arm. The actuator is operatively coupled to the cam member, such that actuation of the actuator rotates the cam member and causes the cam member to engage the second portion of the lever arm and pivots the lever arm to a released position wherein the first portion of the lever arm is disengaged from the cart wheel to permit rotation of the wheel.

Abstract: Roller skate, the chassis (1) of which is equipped with a latch (35) equipped with nibs (36,37) which automatically lock the bars (26,27) of a boot in notches (33,34) of the chassis under the tension of a spring (44). The latch can be held in the open position by a catch (47) which can be actuated by one of the bars (26). The chassis is also equipped with a retractable abutment (30) which opposes the movement of the latch in the absence of any boot, this abutment being parted from the latch by one of the bars (27) of the boot when the boot is being put on. This retractable abutment on the one hand ensures that the two bars of the boot are suitably engaged in the notches in the chassis and, on the other hand, prevents inadvertent and dangerous closure of the latch when manipulating the skate.