초록 ▼

In a cement anchor for use in lightweight construction panels which anchor comprises a cylindrical body and at least one piston body and which includes a sealed cylinder interior filled with a flowable cement, the cylindrical body has at opposite ends at least one discharge opening which is closed b

In a cement anchor for use in lightweight construction panels which anchor comprises a cylindrical body and at least one piston body and which includes a sealed cylinder interior filled with a flowable cement, the cylindrical body has at opposite ends at least one discharge opening which is closed but can be opened by a pressure-controlled valve structure for discharging the cement to the ambient area when installed in the lightweight construction panel.

대표청구항 ▼

1. A cement anchor for installation in a bore in a light weight construction panel (100), the cement anchor including a cylindrical body (10), at least one piston body (50, 150) disposed in the cylindrical body (10) and forming therein a displacement chamber (36) which is filled with a flowable ceme

1. A cement anchor for installation in a bore in a light weight construction panel (100), the cement anchor including a cylindrical body (10), at least one piston body (50, 150) disposed in the cylindrical body (10) and forming therein a displacement chamber (36) which is filled with a flowable cement (8), and closed by a front end of the piston body (50, 150) the cylindrical body (10) having a lower end area (22) and an upper end area (21), at least one flow control edge (34, 134) formed in the cylindrical body (10), the cylindrical body (10) and the piston body (50, 150) defining jointly a cement discharge opening for at least one cement flow channel (73, 173) extending from adjacent the front end (72) of the piston body (10) along the piston and cylindrical bodies to at least one of the lower and upper end areas (22, 21) of the cylindrical body (10) for conducting, upon movement of the piston body (10) past the flow control edge (34, 134) during insertion of the piston body (50,150) into the cylindrical body (10), cement from the displacement chamber (36) to at least one of the lower and upper end areas (22, 21) for solidification in the respective end area (22, 21) and locking the piston body (50, 150), the cylindrical body (10) and the whole anchor in place in the light weight construction panel. 2. The cement anchor according to claim 1, wherein the piston body (50, 150) has a central bore (55, 56) for accommodating an attachment means (80). 3. The cement anchor according to claim 1, wherein the piston body (50, 150) is locked in the cylinder (10) when the cement anchor is not activated. 4. The cement anchor according to claim 1, wherein the at least one piston body (50, 150) includes at least one channel (73, 173) which—in the direction of movement of the piston—starts shortly after the piston bottom end face (72) and, with the cement anchor pushed together—ends after the end area (21, 22) of the cylinder body (10). 5. The cement anchor according to claim 1, wherein the cylinder body (10) has a cylinder bottom (41) with a discharge opening (43), which is sealingly closed by a closure element (45) while the cement anchor is not activated. 6. The cement anchor according to claim 5, wherein the closure element (45) is a ball (45) pressed into the discharge opening (43). 7. The cement anchor according to claim 2, wherein the piston body (50) includes means for receiving an attachment means (80). 8. The cement anchor according to claim 7, wherein the piston body (50) includes a central opening (55, 56) whose average diameter is smaller, by 30%, than the core- or minimum diameter of the attachment means (80). 9. The cement anchor according to claim 1, wherein the cylindrical body (10) includes a cylinder area (33) and a displacement area (36) having an inner diameter, which is larger than that of the cylinder area (33) and the piston body (50) is disposed closely adjacent the cylinder area (33) when the cement anchor is not activated. 10. The cement anchor according to claim 9, wherein at least one piston body (50, 150) includes cement-carrying channels (73, 173) whose ends (74, 174) adjacent the piston bottom are spaced from the piston bottom (72) of the piston (50, 150).