Claims
- 1. An apparatus for casting an internally threaded anchor in a concrete item in a mold having a mold wall comprising a hole in the mold wall, the apparatus comprising:a first piece comprising: a one piece molded plastic anchor comprising a first end, a second end, a first axis through said first end, an internally threaded first opening in said first end, said second end being closed, a portion of said anchor, spaced from said first end, being radially larger than said first end so that said anchor is held permanently in concrete when liquid concrete is added to the mold with the anchor mounted on the mold wall, and the concrete hardens, a second piece comprising: a one piece plastic body comprising a third and eternally threaded to fit said internally threaded first opening, a fourth end, a second axis through said third end and said fourth end, a second axially extending opening in said third end, a third axially extending opening in ad fourth end, said fourth end on said body being configured for axially slidable close radial fit in the hole in the wall of the mold, comprising means for extending said body into said wall a first length of said body, a radially inward extending protrusion in said second opening, spaced from said third end and said forth end, for receiving a tool for transferring rotational force to said third end for screwing said body from said anchor.
- 2. The apparatus of claim 1 wherein said protrusion is recessed said first length from said fourth end.
- 3. The apparatus of claim 2 further comprising an annular member extending radially from said body so that said annular member seals said first opening when said third end is screwed into said first opening, one axial end of said radially inward extending protrusion being at the axial position of said annular member.
- 4. An apparatus for casting an internally threaded anchor in a concrete wall of a tank, in a mold for the tank having a mold wall comprising a hole in the mold wall, the apparatus comprising:a first piece comprising: a one piece plastic anchor comprising a first end, a second end, a first axis through said first end, an internally threaded first opening in said first end, said second end being closed, a portion of said anchor extending radially from said first axis, configured so that said anchor is held permanently in concrete when liquid concrete is added to the mold and the concrete hardens, a second piece comprising: a one piece plastic body comprising a third end externally threaded to fit said first opening, a fourth end, a second axis through said third end, said fourth end being configured fort axially slidable close radial fit in said mold in the mold wall, a second opening in said fourth end extending toward said third end, an annular member extending radially from said body so that said annular member seals said first opening when said third end is screwed into said first opening, a radially inward extending protrusion in said second opening, spaced from said fourth end, configured for receiving a tool for transferring rotational force to said body for screwing said body out of said anchor, one axial end of said protrusion being at tho axial position of said annular member so that said protrusion in said second opening provides radial inward reinforcement of the body at said annular member so that said body shears adjacent to said annular member.
- 5. An apparatus for casting an internally threaded anchor in concrete wall of a tank, in a mold for the tank having a mold wall comprising a hole in the mold wall, the apparatus comprising:a first piece comprising: a one piece frustoconical molded plastic anchor comprising a first end, a second end, a first axis through said first end, an internally threaded first opening in said first end, said second end being closed, said second end being larger than said first end so that said anchor is held permanently in concrete when liquid concrete is added to the mold with the anchor mounted on the mold wall, and the concrete hardens, a second piece comprising: a one piece plastic body comprising a third end externally threaded to fit said first opening, a fourth end, a second axis through said third end, said forth end being configured for axially slidable close radial fit in said hole in the mold wall, a second opening in said third end extending toward said fourth end, a third opening said fourth end extending toward said third end an annular member extending radially from said body so that said annular member seals said first opening when said third end is screwed into said first opening, a protrusion in said third opening, spaced from said forth end, configured for receiving a tool for transferring rotational force to said body for screwing said body out of said anchor, one axial end of said protrusion being configured at the axial position of said annular member so that said protrusion in said third opening provides radial inward reinforcement of the body at said annular member so that said body shears adjacent to said annular member.
- 6. The apparatus of claim 5 wherein said second opening connects with said third opening.
- 7. An apparatus for casting an internally threaded anchor in a concrete wall of a tank, cast in concrete in a mold for the tank having a mold wall closing a hole in the mold wall, comprising:a one piece plastic anchor comprising a first end, a second end, a first axis through said first end, an internally threaded first opening in said first end, said second end being closed, cast in said concrete, a portion of said anchor extending radially from said first axis, configured so that said anchor is held permanently in said concrete, a one piece plastic body comprising a third end externally threaded to fit said first opening screwed in said first opening, a fourth end, a second axis through said third end, said fourth end being configured for axially slidable close radial fit in said hole in the mold wall, extending into said hole in said mold wall, a second opening in said fourth end extending toward said third end, an annular member extending radially from said body, sealing said first opening, a radially inward extending protrusion in said second opening, spaced from said fourth end, configured for receiving a tool for transferring rotational force to said body for screwing said body out of said anchor, one axial end of said protrusion being at the axial position of said annular member so that said protrusion in said second opening provides radial inward reinforcement of the body at said annular member so that said body shears adjacent to said annular member when said tank is removed from said mold wall.
Parent Case Info
This is a division of application Ser. No. 09/575,385, filed May 22, 2000, abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (2)
Number |
Date |
Country |
3347665 |
Jul 1985 |
DE |
2107753 |
May 1983 |
GB |