HAPCO ALUMINUM POLE PRODUCTS Patent applications |
Patent application number | Title | Published |
20110017562 | VIBRATION DAMPING SYSTEM FOR UTILITY POLES - A vibration damping mechanism for utility poles includes a cylindrical hollow tube including a sidewall having outer and inner side surfaces. The inner side surface forms an elongated inner chamber defining a longitudinal axis and having longitudinally spaced upper and lower ends. An unrestricted cylindrical rod disposed in the chamber is capable of limited movement in the chamber to damp oscillations. A section of the tube's sidewall is flat to form vertical flats along the outer and inner side surfaces. Formed portions of the sidewall disposed at respective upper and lower ends of the chamber are bent inwardly to extend across, and close, the upper and lower chamber ends, respectively. The lower one of the formed portions is shaped to define a raised pivot engaging a bottom face of the rod at a location laterally inwardly of the rod's outer side face. | 01-27-2011 |
20080250752 | Embeddable breakaway utility pole - An embeddable breakaway utility pole comprises separate upper and lower aluminum pole pieces, wherein the lower pole piece is to be embedded below ground surface. The upper and lower pole pieces are interconnected by a weld which defines a breakaway zone enabling the upper pole piece to break off the lower pole piece in response to vehicular impact. The weld can be connected to a backer ring which provides a guide surface that axially aligns the pole pieces. Alternatively, the pole can be formed of a single pole piece which is welded between its ends to form a weakened region that defines the breakaway zone. | 10-16-2008 |
20080239733 | Pole vibration damping apparatus - A highway lighting apparatus includes a lighting fixture, and a vibration damper. The vibration damper includes a housing having a ball chamber, the chamber being of square shape. One or two vibration damping balls are mounted in the chamber for independent free rolling movement therein. If two balls are used, the ball diameter is shorter than one-half of each of the four chamber sides. If the damper is used on a pole having a side-mounted light fixture, the housing would include a downwardly open socket receiving the top end of the pole, with a center axis of the pole coinciding with respective center axes of the chamber and the socket. In the case where the damper is used on a pole having a top-mounted light fixture, the damper would be mounted below the light fixture on a side of the pole. | 10-02-2008 |