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2. 发明授权

US3837370A Method for making a pipe reinforcing cage 失效
公开(公告)号：US3837370A
公开(公告)日：1974-09-24
申请号：US28974072
申请日：1972-09-15
申请人： CONCRETE PIPE MACHINERY CO
发明人： GATES R , SCHNEIDER H
IPC分类号： B21F27/12 , E04C5/06 , B21F27/20
CPC分类号： E04C5/0604 , B21F27/121 , B21F27/125
摘要： A pipe reinforcing cage comprises a cage unit and a bell assembly adapted for snap-on connection thereto. The bell assembly has spaced apart coaxial circular rings supported by longitudinal members attached thereto, the longitudinal members comprising the elongated end section of wire forms having an intermediate section and an opposite end section adapted to provide snap-on connection to the circumferential members of the cage unit. Said opposite end section has a tapered portion that contacts the first circumferential member of the cage unit as the bell unit is pushed into contact with said cage unit, causing the wire form to be deflected outward so as to pass toward and around said cage unit until a first loop section of the wire form is opposite said first circumferential member of the cage unit, at which point the wire form springs inward so that the said first circumferential member is positioned within said loop section. This loop section has a tapered portion on its backside. Further pushing of the bell assembly toward the cage unit results in deflection of the wire form again so that said bell assembly moves toward the cage unit until the second circumferential member of the cage unit is positioned opposite said first loop section and the first circumferential member is positioned opposite a second loop section of the wire form. At this point, the wire form springs back to its original orientation, with the circumferential members of the cage unit thus snapped into position within the respective loop sections of the wire form. The second loop section of the wire forms has a flat portion on its backside. The second loop section of the wire forms said flat portion being positioned perpendicular to the directions of movement of said bell assembly relative to the cage unit, i.e. parallel to the orientation of said circumferential members, and adapted to preclude further movement of the wire form around and past the cage unit. The bell assembly is thus held in fixed position with respect to the cage unit. The wire form also serves to act as a spacer to locate the cage unit to which it is attached at a desired distance from the outer shell of the pipe form and at a fixed distance from the pallet of said pipe form.

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