Static structures (e.g. – buildings) – Including component designed to receive a disparate article... – On shaft or tower
Reexamination Certificate
2000-05-26
2002-02-19
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Including component designed to receive a disparate article...
On shaft or tower
C052S697000, C052S749100, C052S749100, C052S749100, C052S220100, C174S04500R, C174S14900R, C174S146000, C174S175000
Reexamination Certificate
active
06347488
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to utility poles, and more particularly, to a cross-arm for a utility pole, which is made from synthetic material.
BACKGROUND OF THE INVENTION
Power transmission lines are typically supported above the ground to provide isolation between them and the environment. One of the most common arrangements for supporting transmission lines utilizes a plurality of electrical insulators mounted on wooden cross-arms attached to vertical wooden poles. Because such cross-arms are fabricated from wood, they are subject to rotting and are relatively heavy. Consequently, when conventional wooden utility pole cross-arms need to be replaced, considerable manual effort is required not only in the removal of the deteriorated cross-arm but also in the installation of the replacement cross-arm.
Accordingly, a need exists for a utility pole cross-arm that is considerably less weighty and has a substantially indefinite life span.
SUMMARY OF THE INVENTION
A cross-arm for a utility pole, the cross-arm comprising an elongated bar member molded from synthetic material, the elongated bar member having a first end, a second end opposite the first end, and a plurality of through-holes for mounting the cross-arm to a utility pole with fasteners and for mounting electrical line support insulators.
One aspect of the invention involves a groove that extends from the first end to the second end of the elongated bar member, for receiving a wire or cable.
Another aspect of the invention involves a recess in a wall of the elongated bar member which substantially conforms a section of the wall to the utility pole.
Still another aspect of the invention involves first and second end-caps for enclosing the first and second ends of the elongated bar member.
REFERENCES:
patent: 1021831 (1912-04-01), Ferringer
patent: 2890793 (1959-01-01), Bailey
patent: 3013584 (1961-12-01), Reed et al.
patent: 3235652 (1966-02-01), Lindsey
patent: 3531578 (1970-09-01), Dey
patent: 3574104 (1971-04-01), Medler
patent: 4262047 (1981-04-01), Barnett et al.
patent: 4682747 (1987-07-01), King, Jr. et al.
patent: 4728749 (1988-03-01), Knight
patent: 4867399 (1989-09-01), Therond
patent: 5605017 (1997-02-01), Fingerson et al.
Duane Morris & Heckscher LLP
Nguyen Chi
Schwarz, Esq. Paul A.
Stephan Beth A.
LandOfFree
Utility pole cross-arm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Utility pole cross-arm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Utility pole cross-arm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2947753