Removable recess forming insert
Patent 5004208 Issued on April 2, 1991. Estimated Expiration Date: 
January 25, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 25, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1045587 2344206 2366656 2623261 3534668 3731902 Edge-lifting system for a concrete slab Apparatus for forming recess around a pickup bolt of a concrete body Mandrel for making elastomeric articles Molding for the retention of a tie in the concreting of a precast concrete part Patent #: 4821994 InventorApplicationNo. 469959 filed on 01/25/1990US Classes:249/91, Including means other than mold surface to support preform52/125.4, Embedded in settable material249/95, Split mold clamps and supports preform249/177, Including means for attaching core to a support249/183Of resilient material capable of flexure to aid removal of core from productExaminersPrimary: Housel, James C.Attorney, Agent or FirmForeign Patent References
International ClassE04G 015/04AbstractA removable recess forming rubber insert is immersed in wet concrete after pouring, installing in the resulting concrete unit a lifting anchor or stirrup for moving the concrete unit with a lifting hook and cable. The rubber insert, has a stirrup eye for supporting and encompassing a portion of the lifting stirrup and a stirrup release slot for releasing the stirrup as the insert is removed from the hardened concrete unit. The insert utilizes a standard reinforcing bar as the lifting stirrup. The insert is formed as a mold body having a semi-cylindrical lower face to allow easy removal of the insert and to provide a recess for access to the lifting stirrup by a lifting hook. A protruding mold thumb is used to remove the insert after the concrete unit has hardened.Field of SearchSplit mold clamps and supports preformIncluding means for attaching core to a support Of resilient material capable of flexure to aid removal of core from product Of plural sections Including means other than mold surface to support preform Preform supported by hole or recess in mold wall or surface Hinged sections Clamp or bracket, per se With feature engaging form Integral penetrating means Separate forms fastener within socket member Socket type Embedded in settable material Embedded socket element Lewises Collar-engaging | |
