Apparatus for a carriage traveling along a roof structure
OwnerErnest C. Abneyinventor
Life of this patent
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Abstract
An apparatus is movable along a roof structure having a plurality of elongated purlins defining longitudinal axes. The apparatus includes a carriage movable along the length of the purlins. The carriage extends across the purlins. A plurality of support members are mounted on the carriage and engage with the purlins. Each of the support members includes a flange which abuts a purlin to prevent the purlin from twisting about its longitudinal axis.
Claims20
An apparatus movable along a roof structure having a plurality of elongated purlins defining longitudinal axes, said apparatus comprising:
- a carriage movable along the purlins, said carriage extending across the purlins;
- and
- a plurality of support members mounted on said carriage and engaged with the purlins, wherein each of said support members includes a flange which abuts one of the purlins to prevent the purlin from twisting about the longitudinal axis of the corresponding purlin.
In combination:
- 1) a roof structure having a plurality of elongated purlins defining longitudinal axes, said plurality of purlins having a generally Z-shaped cross-section including a generally horizontally extending upper portion, a generally horizontally extending lower portion, and a vertically extending web disposed between said upper portion and said lower portion;
- and
- 2) an apparatus including:
- a carriage movable along the purlins, said carriage extending across the plurality of purlins;
- and
- a plurality of support members mounted on said carriage and engaged with the purlins, wherein each of said support members includes a flange which abuts said upper portion of a purlin to prevent the corresponding purlin from twisting about its longitudinal axis.
A support member for guiding a carriage movable along a roof structure having a plurality of elongated purlins defining longitudinal axes which are spaced apart from one another in a parallel arrangement, said support member comprising:
- a mounting member adapted to be attached to the carriage;
- a roller rotatably attached to said mounting member and adapted to rotatably engage the purlin;
- and
- a flange attached to said mounting member and positioned for abutment against the purlin to prevent the purlin from twisting about the longitudinal axis.
Dependencies are inferred from the claim text.