# US 5,347,777 A · Anchor plate assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,347,777 A - Document ID: US5347777A - Status: Granted - Kind: A - Application number: 08/052,487 - Filed: 1993-04-23 - Granted: 1994-09-20 - Earliest claimed: 1993-04-23 - Assignees: Post Tension Product Mfg., Inc. - Inventors: James R. Sudduth - Web page: https://patentgrep.com/patent/US5347777A ## CPC - E04C 5/122: {the tensile members are anchored by wedge-action} - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) ## Abstract A post tensioning anchor plate assembly comprising an anchor plate and coupling elements therefor. The anchor plate is constructed with a pair of oppositely disposed, concentrically aligned cylindrical bosses, or mounting members, projecting from opposite sides of a generally rectangular plate. The oppositely disposed bosses define, on the inside surface thereof, a common tapered bore adapted for receiving a post tensioning cable therethrough and securement thereof for post tensioning of a concrete section. The outside surface of each boss is likewise constructed with a circumferential groove adapted for receiving an inwardly projecting lip of an appropriate plastic cap or tubular adapter secured thereover. In this manner, the plastic cap and tubular adapter can be mounted to opposite sides of the anchor plate in sealed engagement therewith for facilitating improved reliability of the post tensioning anchor plate assembly. ## Claims ### Claim 1 A method of mounting a tubular adaptor to a post tensioning mounting plate of the type used for anchoring a post tensioning tendon to a concrete formation, comprising the steps of: forming said mounting plate with a mounting member of generally cylindrical construction disposed on the side of the mounting plate facing the concrete formation; forming a groove in the outer surface of said mounting member; forming an inwardly projecting lip within said tubular adaptor; forming a groove in the outer surface of said tubular adaptor; mounting said tubular adaptor over said mounting member with said inwardly projecting lip of said tubular adaptor engaging said groove in said mounting member; and providing a compression ring and receiving said compression ring in said groove of said tubular adaptor. ### Claim 2 A method of mounting a coupling element cap to a post tensioning mounting plate of the type used for anchoring a post tensioning tendon to a concrete formation, comprising the steps of: forming said mounting plate with a mounting member of generally cylindrical construction disposed on the side of the mounting plate facing away from the concrete formation; forming a groove in the outer surface of said mounting member; forming an inwardly projecting lip within said cap; forming a groove in the outer surface of said cap; mounting said cap over said mounting member with said inwardly projecting lip of said cap engaging said groove in said mounting member; and providing a compression ring and receiving said compression ring in said groove of said cap. ### Claim 3 An improved anchor plate assembly of the type in which a plate for placement in a concrete formation includes an aperture for a tendon to pass therethrough, a first side facing away from the concrete formation, and a second side facing the concrete formation, the improvement comprising: a mounting member mounted to the first side of the plate, said mounting member having an aperture sized for the passing of the tendon therethrough and aligned with the aperture in the plate, an outer surface extending from the plate, and a continuous groove in the outer surface which surrounds said mounting member; a cap having an open end with an interior for receiving the outer surface of said mounting member and a lip for engaging the groove of said mounting member, and with an exterior having a groove located sufficiently close to the lip of the interior region that force applied to the groove will cause pressure between the lip of the interior region and the groove of said mounting member, and having a closed end; and a ring for mounting within the groove of said cap and applying force thereon, thereby causing pressure between the lip of said cap and the groove of said mounting member. ### Claim 4 An improved anchor plate assembly of the type in which a plate for placement in a concrete formation includes an aperture for a tendon to pass therethrough, a first side facing away from the concrete formation, and a second side facing the concrete formation, the improvement comprising: a mounting member mounted to the second side of the plate, said mounting member having an aperture sized for the passing of the tendon therethrough and aligned with the aperture in the plate, an outer surface extending from the plate, and a continuous groove in the outer surface which surrounds said mounting member; a tubular adaptor having a first end with an interior for receiving the outer surface of said mounting member and a lip for engaging the groove of said mounting member, and with an exterior having a groove located sufficiently close to the lip of the interior region so that force applied to the groove will cause pressure between the lip of the interior region and the groove of said mounting member, and having a second end with an interior region for passing the tendon therethrough; and a ring for mounting within the groove of said tubular adaptor and applying force thereon, thereby causing pressure between the lip of said tubular adaptor and the groove of said mounting member. ### Claim 5 (depends on 4) The improved anchor plate assembly as in claim 4, wherein the improvement further comprises a tubular member having a central passage for passage of the tendon and having a first end with an interior surface adapted for press fit on the exterior surface of the second end of said tubular adaptor. ### Claim 6 (depends on 4) The improved anchor plate assembly as in claim 4, wherein the improvement further comprises a tubular member having a central passage for passage of the tendon, a first end with an interior surface adapted for press fit on the exterior surface of the second end of said tubular adaptor, and a second end with an interior surface adapted for mating engagement with said tendon.