Abstract: A stand-alone deburring apparatus greatly facilitates accurate deburring of difficult-to-access burrs located inside tubes, and does so in a manner which eliminates the need to tie up another more cumbersome and costly piece of machinery, such as a drill press. The apparatus includes a base plate, a motor with a horizontal shaft mounted to the base plate and a deburring body mounted vertically, adjacent the end of the shaft. The shaft coacts with toothed gears inside the body to rotatably drive the gears and a horizontally-oriented countersink coupled thereto. An adjustable collar provides a support surface or platform for supporting a tube to be deburred in alignment with the axis of the vertical body. With the vertically-oriented body, the horizontally-oriented countersink and the adjustable collar, the inside of a tube may be easily deburred while held in vertical orientation.

Abstract: A hinge for a range door and the like having a frame bracket (18) adapted to be mounted to a range housing, a hinge arm (40) adapted to be mounted to a range door and pivotably mounted to the frame bracket (18) and a cam follower arm (16) pivotably mounted to the frame bracket (18). A cam follower element (76) on the cam arm (60) is biased by a tension spring (80) against a cam surface on a cam arm portion (46) of the hinge arm to counterbalance the weight of the range door. The cam surface has indentations (50, 52) which define equilibrium positions of the door for an ajar and fully open position. A tab stop (34) is struck out from the frame bracket (18) to stop the pivotable movement of the cam follower arm (60) as the hinge arm (40) reaches the fully open position (FIG. 5). The cam follower arm (60) has a number of indentations (64) for receiving one end (84) of the spring (80) to adjust the counter-balancing force on the oven door.