发明授权
- 专利标题: Apparatus for fabricating precast concrete ramps
- 专利标题(中): 用于制造预制混凝土坡道的装置
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申请号: US33008申请日: 1993-03-18
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公开(公告)号: US5277573A公开(公告)日: 1994-01-11
- 发明人: Thomas Sullivan
- 申请人: Thomas Sullivan
- 专利权人: Thomas Sullivan
- 当前专利权人: Thomas Sullivan
- 主分类号: B28B7/22
- IPC分类号: B28B7/22 ; B28B7/38 ; B28B13/06 ; E04F11/00 ; B28B7/16 ; B28B7/26
摘要:
A ramp for the physically challenged includes three different types of sectional portions: a slab disposed at the interface of a level surface such as a floor or earth ground; one or more ramp portions, each having a sloping upper surface, disposed adjacent to one another; and a switch platform having a level upper surface. Forms used to fabricate the three different types of sections are provided. A form for fabricating the sloping ramp portion includes a bulkhead, outer panels, and a set of inserts having varying height. The inserts are used to vary the resulting depth of the side panels of the concrete ramp portions. An upper surface of the bulkhead is sloped downwardly in a plane parallel to that of the upper surface of the concrete ramp portion. Apparatus is provided to elevate the front portion of the assembled form so as to place the upper surface of the bulkhead in a horizontal plane that is parallel to the plane of the level surface upon which the form rests.
公开/授权文献
- USD364970S Curved back chair 公开/授权日:1995-12-12
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