Patent ID: 7686719
Filing Date: 2010-03-30
Classification: F16H

Abstract:
1. A belt tensioner comprising: a spring case body for mounting the belt tensioner on a mounting surface of a structure, the spring case body defining a cavity, wherein the spring case body comprises a mounting face that defines the bottom of the cavity and a peripheral generally annular wall extending from the mounting face; a spring housed within the spring case body; and a tensioner arm coupled to the spring, wherein the spring biases the tensioner arm in a direction to tension a belt; wherein the spring case body further comprises a drain hole in communication with the cavity, the drain hole comprising an exit that is disposed in an external surface of the mounting face, wherein the periphery of the exit is defined only by the mounting face, wherein the spring case body includes a groove recessed into the external surface of the mounting face and wherein the groove is in fluid communication with the exit of the drain hole.