Clamping element

• US 6,510,598 B2
• Filed: 06/20/2001
• Issued: 01/28/2003
• Est. Priority Date: 07/17/2000
• Status: Expired due to Term

• Current Assignee: Georg Fischer Rohrleitungssysteme AG (Georg Fischer AG)
• Original Assignee: Georg Fischer Rohrleitungssysteme AG (Georg Fischer AG)
• Inventors: Bayer, Marcus, Wermelinger, Jorg
• Primary Examiner(s): WILSON, LEE D
• Application Number:
  US09/885,664
• Publication Number:
  US 20020004976A1
• Time in Patent Office: 587 Days
• Field of Search: 292/811, 295/59, 269/900, 269/254.CS, 269/6, 269/3, 269/257, 269/909
• US Class Current: 29/281.1
• CPC Class Codes: B25B 5/06 Arrangements for positively actuating jaws
• CPC Class Codes: B25B 5/147 for pipes
• CPC Class Codes: B29C 65/7841 Holding or clamping means for handling purposes clamping means for the purpose of applying pressure on the parts to be joined, in the area to be joined B29C66/81; work holders in general B25B; devices for holding or positioning work for welding metal B23K37/04
• CPC Class Codes: B29C 66/522 Joining tubular articles B29C66/53241 takes precedence
• CPC Class Codes: B29C 66/5223 for forming corner connections or elbows, e.g. for making V-shaped pieces
• CPC Class Codes: B29C 66/534 Joining single elements to open ends of tubular or hollow articles or to the ends of bars
• CPC Class Codes: Y10T 29/53961 with work-holder for assembly

Abstract

A clamping device for fixing plastic molded parts during welding is proposed, comprising a flange-like fastening part for fastening on a plastics welding device, the fastening part having at least one first annular recess for receiving a clamping element and the fastening part having at least one second recess for receiving spring elements acting radially on the clamping element, the clamping element having at least one projection on an inner surface which is arranged opposite the outer surface of the plastic molded part. The clamping element allows good fixing of the plastic molded parts in a very confined space.

Claims

1. A clamping device for use with a plastic welding machine for fixing plastic molded parts during welding, comprising a fastening part for fastening on a plastics welding machine, the fastening part has an at least one first annular recess for receiving a clamping element and an at least one second recess for receiving spring means which acts radially on the clamping element, wherein the clamping element has at least one projection on an inner surface which bears on an outer surface of a plastic molded part to be welded.

2. A clamping device according to claim 1, wherein the clamping element is annular and the inner surface of the annular clamping element extends coaxially with the plastic molded part and is arranged in a segmental manner, in such a way that the projection encloses the plastic molded part with a uniformly distributed clamping force during the welding operation.

3. A clamping device according to claim 1, wherein the projection has side surfaces and a clamping surface, the clamping surface being arranged in such a manner that it extends concentrically with respect to the axially extending inner surface.

4. A clamping device according to claim 3, wherein the clamping surface is arranged at right angles with respect to the side surfaces and form sharp edges.

5. A clamping device according to claim 1, including a plurality of projections arranged such that they extend parallel to one another.

6. A clamping device according to claim 5, wherein the projections are arranged such that they are spaced one behind the other in an axial direction of the plastic parts to be welded.

7. A clamping device according to claim 1, including a plurality of projections wherein the projections have a height H of 0.1 to 0.3 mm above the inner surface of the clamping element.

8. A clamping device according to claim 1, wherein the clamping surface of the projection has a width B of less than 20% of a width b of the inner surface of the clamping element.

9. A clamping device comprising a fastening part, the fastening part has at least one first annular recess for receiving a clamping element and at least one second recess for receiving spring means which acts radially on the clamping element, wherein the clamping element has at least one projection on an inner surface and wherein the clamping element is annular and the inner surface of the annular clamping element is arranged in a segmental manner.

10. A clamping device according to claim 9, wherein the projection has side surfaces and a clamping surface, the clamping surface being arranged in such a manner that it extends concentrically with respect to the axially extending inner surface.

11. A clamping device according to claim 10, wherein the clamping surface is arranged at right angles with respect to the side surfaces and form sharp edges.

12. A clamping device according to claim 9, including a plurality of projections arranged such that they extend parallel to one another.

13. A clamping device according to claim 9, wherein the projections are arranged such that they are spaced one behind the other in an axial direction.

14. A clamping device according to claim 9, including a plurality of projections wherein the projections have a height H of 0.1 to 0.3 mm above the inner surface of the clamping element.

15. A clamping device according to claim 9, wherein the clamping surface of the projection has a width B of less than 20% of a width b of the inner surface of the clamping element.

16. A clamping device according to claim 9, including two fastening parts and two clamping elements are respectively arranged as semicircular workpieces matching one another.

21. A clamping device according to claim 9, wherein the projections are arranged such that they are spaced one behind the other in an axial direction.

17. A clamping device comprising at least one projection on an inner surface which is arranged opposite the outer surface of the plastic molded part, wherein the clamping element is annular and the inner surface of the annular clamping element is arranged in a segmental manner.

18. A clamping device according to claim 17, wherein the projection has side surfaces and a clamping surface, the clamping surface being arranged in such a manner that it extends concentrically with respect to the axially extending inner surface.

19. A clamping device according to claim 18, wherein the clamping surface is arranged at right angles with respect to the side surfaces and form sharp edges.

20. A clamping device according to claim 17, including a plurality of projections arranged such that they extend parallel to one another.

22. A clamping device according to claim 17, including a plurality of projections wherein the projections have a height H of 0.1 to 0.3 mm above the inner surface of the clamping element.

23. A clamping device according to claim 17, wherein the clamping surface of the projection has a width B of less than 20% of a width b of the inner surface of the clamping element.

24. A clamping device according to claim 17, including two clamping elements arranged as semicircular elements matching one another.