公开(公告)号：US20200173481A1

公开(公告)日：2020-06-04

申请号：US16784411

申请日：2020-02-07

申请人： THE HILLMAN GROUP, INC.

发明人： Farhad LAJEWARDI ,  Shreenivas IYER

IPC分类号： F16B25/00

摘要： A cement board screw a high thread that begins on the tapered end, extends onto the shank and terminates at a second axial location along the shank. The high thread defines a high peripheral edge, where a leading flank and a trailing flank meet at the high peripheral edge and together define a high thread angle that is between about thirty degrees and about fifty-five degrees. A low thread begins on the tapered end, extends onto the shank and terminates substantially at a first axial location along the shank such that an axial length of the low thread is less than an axial length of the high thread. The low thread includes a leading flank and a trailing flank that meet at a low peripheral edge and together define a low thread angle that is between about fifty degrees and about seventy degrees.

公开(公告)号：US20190390700A1

公开(公告)日：2019-12-26

申请号：US16426580

申请日：2019-05-30

申请人： THE HILLMAN GROUP, INC.

发明人： Shreenivas IYER

IPC分类号： F16B25/00

摘要： A cement board screw a high thread that begins on the tapered end, extends onto the shank and terminates at a first axial location along the shank. The high thread defines a high peripheral edge, where a leading flank and a trailing flank meet at the high peripheral edge and together define a high thread angle that is between about thirty degrees and about fifty-five degrees. A low thread begins on the tapered end, extends onto the shank and terminates substantially at the first axial location along the shank such that an axial length of the low thread is substantially the same as and contiguous with an axial length of the high thread. The low thread includes a leading flank and a trailing flank that meet at a low peripheral edge and together define a low thread angle that is between about fifty degrees and about seventy degrees.