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US 9,828,778 B2Granted
Walkway pad with expansion joints
AssigneeFirestone Building Products Company, LLC
InventorsCarl E. Watkins, Jr., Lichih Peng
Life of this patent
Estimating the term…
Abstract
A walkway pad is provided for placement on a flat roof to protect the roof from foot traffic, tools, and/or equipment. The walkway pad includes a body and at least one expansion joint that absorbs thermal movement of the body. A method of manufacturing the walkway pad is also provided.
Claims20
A walkway pad for protecting a roof, the walkway pad comprising:
- a body including a top walkway surface and a bottom surface that faces the roof;
- and
- at least one expansion joint including a first attachment region coupled to said body, a second attachment region adapted to couple the walkway pad to the roof, and a third expansion region located between said first and second attachment regions that is free to move relative to said body and the roof to absorb thermal movement of said body, where said expansion joint is constructed of a thermoplastic polyolefin.
A walkway pad for protecting a roof, the walkway pad comprising:
- a body including a top walkway surface, a bottom surface that faces the roof, and an outer periphery, where the body includes a supported thermoplastic polyolefin;
- and
- at least one expansion joint coupled to said body, said expansion joint extending outwardly beyond said outer periphery of said body, said at least one expansion joint including an expansion region that is configured to deform to a greater extent than said body when the walkway pad is exposed to a changing temperature, and said expansion joint being constructed of a thermoplastic polyolefin.
A method of manufacturing a walkway pad for protecting a roof, the method comprising the steps of:
- providing a body including a top walkway surface, a bottom surface, and an outer periphery;
- and
- forming at least one thermoplastic expansion joint that extends beyond said outer periphery of said body, said at least one expansion joint including a first attachment region coupled to said body, a second attachment region adapted to couple the walkway pad to the roof, and a third expansion region located between said first and second attachment regions that is configured to deform to a greater extent than said body when the walkway pad is exposed to a changing temperature.
Dependencies are inferred from the claim text.