Back to results
US 5,082,412 AGranted
Roofing washer
AssigneeIllinois Tool Works Inc.
InventorLouis Thomas
Life of this patent
Estimating the term…
Abstract
A roofing washer useful with a fastener having a head and a shank, such as, for example, a roofing screw, and provided with an annular lip so as to restrain the head after the head has been driven past the annular lip is disclosed. As molded from a resilient, polymeric material, the roofing washer has a plurality of discrete cavities, which facilitate radial expansion of the annular lip, and a plurality of discrete ribs, which separate the discrete cavities. In one possible embodiment, each cavity has an inner, generally cylindrical wall, an outer, generally cylindrical wall, and two end walls, each defining a plane oriented at an acute angle relative to a radial plane. In a different embodiment, each cavity has two planar walls and a curved wall whereby the cavities have substantially triangular configurations.
Claims24
A roofing washer useful with a fastener having a head and a shank, comprising:
- a central portion molded from a resilient, polymeric material;
- a central socket defined within said central portion and having a lower wall and a lateral wall, and defining a longitudinal axis, said lower wall having an axial aperture configured so as to permit said shank of said fastener to extend through said axial aperture but not to permit said head of said fastener to pass through said axial aperture, said lateral wall defining an annular lip constituting means for engaging said head of said fastener when said fastener is driven with said shank of said fastener extending through said axial aperture, for being expanded radially as said head of said fastener is driven past said annular lip, and for restraining said head of said fastener, after said head of said fastener has been driven past said annular lip, so as to limit backward movement of said fastener relative to said washer;
- and
- a plurality of discrete cavities arranged within a regular pattern around said central socket and spaced radially outwardly from said central socket by means of said annular lip, said discrete cavities being separated from each other by means of non-radially extending ribs which interconnect said annular lip to said central portion for facilitating radial expansion of said annular lip by accommodating portions of said annular lip, as said head of said fastener is driven past said annular lip with said shank of said fastener extending through said axial aperture, said annular lip being reinforced by said ribs defined between said cavities.
1 more element
A roofing washer useful with a fastener having a head and a shank, comprising:
- a central portion molded from a resilient, polymeric material;
- a central socket defined within said central portion and having a lower wall and a lateral wall, and defining a longitudinal axis, said lower wall having an axial aperture configured so as to permit said shank of said fastener to extend through said axial aperture but not to permit said head of said fastener to pass therethrough, said lateral wall enclosing said central socket and defining an annular lip constituting means for engaging said head of said fastener when said fastener is driven with said shank of said fastener extending through said axial aperture, for being radially expanded as said head of said fastener is driven past said annular lip, and for restraining said head of said fastener, after said head of said fastener has been driven past said annular lip, so as to limit backward movement of said fastener relative to said roofing washer;
- an integral, annular web, which extends radially inwardly from said annular lip and which constitutes means for overlying portions of said head of said fastener when said head of said fastener is disposed within said central socket with said shank of said fastener extending through said central aperture;
- and
- a plurality of discrete cavities arranged within a regular pattern around said central socket and spaced radially outwardly from said central socket by means of said annular lip, said discrete cavities being separated from each other by means of ribs having non-radially extending side portions which interconnect said annular lip to said central portion for facilitating radial expansion of said annular lip by accommodating portions of said annular lip, as said head of said fastener is driven past said annular lip with said shank of said fastener extending through said axial aperture, said annular lip being reinforced by said ribs defined between said cavities.
2 more elements
A roofing washer useful with a fastener having a head and a shank, comprising:
- a central portion molded from a resilient, polymeric material;
- a central socket defined within said central portion and having a lower wall and a lateral wall, and defining a longitudinal axis, said lower wall having an axial aperture configured so as to permit said shank of said fastener to extend therethrough while preventing said head of said fastener to pass therethrough, said lateral wall enclosing said socket and defining an annular lip constituting means for engaging said head of said fastener when said fastener is driven with said shank of said fastener extending through said axial aperture, for being radially expanded as said head of said fastener is driven past said annular lip, and for restraining said head of said fastener, after said head of said fastener has been driven past said annular lip, so as to limit backward movement of said fastener relative to said roofing washer;
- and
- a plurality of discrete cavities arranged within a regular pattern around said central socket and spaced radially outwardly from said central socket by means of said annular lip, said discrete cavities being separated from each other by means of ribs having non-radially extending side portions which interconnect said annular lip to said central portion for facilitating radial expansion of said annular lip by accommodating portions of said annular lip, as said head of said fastener is driven past said annular lip with said shank of said fastener extending through said axial aperture, said annular lip being reinforced by said ribs defined between said cavities.
1 more element
Dependencies are inferred from the claim text.