Diaphragm bellows

Patent metadata

Field	Value
Publication number	US-9958092-B2
Application number	US-201514817364-A
Country	US
Kind code	B2
Filing date	Aug 4, 2015
Priority date	Aug 4, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

In a diaphragm bellows, diaphragms that follow one another are welded together alternately in region of their inner and outer edges. At least one guide part is provided for guiding on a surface of a rod passing through an inner through-opening in the diaphragm bellows or of a tube surrounding the diaphragm bellows. The at least one guide part is made of sheet metal and has a holding portion which, in the case of guiding on a rod, is located, in a region of an outer edge, between adjacent diaphragms and is welded to the adjacent diaphragms and, in the case of guiding on a tube, is located, in the region of an inner edge, between adjacent diaphragms and is welded to the adjacent diaphragms. The holding portion is connected to a guide portion for guiding on the surface of the rod or of the tube.

First claim

The invention claimed is:

1. A diaphragm bellows comprising a plurality of diaphragms with outer edges and inner edges, said diaphragms follow one another in an axial direction of a longitudinal center axis of the diaphragm bellows and are welded together alternately in a region of said inner edges and in a region of said outer edges and first and second end diaphragms form first and second ends of the diaphragm bellows, and at least one guide part adapted for guiding on an outer surface of a rod passing through an inner through-opening in the diaphragm bellows, the at least one guide part is made of sheet metal and includes a holding portion which is located, in a region of an outer edge thereof, between adjacent ones of the diaphragms and is welded to said adjacent diaphragms only in the outer edge region and, starting from the outer edge of the holding portion, extends toward the longitudinal center axis of the diaphragm bellows and projects beyond the inner edges of said adjacent diaphragms in a direction toward the longitudinal center axis of the diaphragm bellows and is connected to a guide portion, located closer to the longitudinal center axis of the diaphragm bellows than the inner edges of said adjacent diaphragms, adapted for guiding on the outer surface of the rod passing through the inner through-opening in the diaphragm bellows, and the guide portion surrounds the longitudinal center axis as a sleeve, wherein the holding portion as well as the guide portion are located, with respect to the axial direction, between the first and second end diaphragms and are axially distanced from the first and second ends of the diaphragm bellows.

2. The diaphragm bellows as claimed in claim 1 , wherein a thickness of the holding portion of the guide part is less than five times a thickness of the diaphragms between which the holding portion of the guide part is arranged.

3. The diaphragm bellows as claimed in claim 2 , wherein the thickness of the holding portion of the guide part is less than three times the thickness of the diaphragms between which the holding portion of the guide part is arranged.

4. The diaphragm bellows as claimed in claim 1 , wherein a thickness of the guide portion of the guide part is less than five times a thickness of the diaphragms between which the holding portion of the guide part, to which the guide portion is connected, is arranged.

5. The diaphragm bellows as claimed in claim 4 , wherein the thickness of the guide portion of the guide part is less than three times the thickness of the diaphragms between which the holding portion of the guide part, to which the guide portion is connected, is arranged.

6. The diaphragm bellows as claimed in claim 1 , wherein the guide portion is configured in a material-integral manner with the holding portion or with at least an individual part of the holding portion, or is cohesively connected to the holding portion.

7. The diaphragm bellows as claimed in claim 1 , wherein the diaphragms, located on both sides of the holding portion of the guide part, and the holding portion rest against one another in a completely compressed state of the diaphragm bellows.

8. The diaphragm bellows as claimed in claim 1 , wherein the guide portion of the guide part has a central opening of which a diameter is at least 80% of a diameter of central openings in the diaphragms located on both sides of the holding portion of the guide part.

9. The diaphragm bellows as claimed in claim 1 , wherein the diaphragm bellows has at least two guide parts.

10. The diaphragm bellows as claimed in claim 9 , wherein the guide parts that follow one another in the axial direction of the longitudinal center axis of the diaphragm bellows are spaced apart from one another in the axial direction of the longitudinal center axis even in a completely compressed state of the diaphragm bellows.

11. The diaphragm bellows as claimed in claim 1 , wherein the guide portion extends axially inside a plurality of the diaphragms.

12. A diaphragm bellows comprising a plurality of diaphragms with outer edges and inner edges, said diaphragms follow one another in an axial direction of a longitudinal center axis of the diaphragm bellows and are welded together alternately in a region of said inner edges and in a region of said outer edges and first and second end diaphragms form first and second ends of the diaphragm bellows, and at least one guide part adapted for guiding on an inner surface of a tube surrounding the diaphragm bellows, the at least one guide part is made of sheet metal and includes a holding portion which is located, in a region of an inner edge thereof, between adjacent ones of the diaphragms and is welded to said adjacent diaphragms only in the region of the inner edge and, starting from an inner edge of the holding part, extends away from the longitudinal center axis of the diaphragm bellows and projects beyond the outer edges of said adjacent diaphragms in a direction away from the longitudinal center axis of the diaphragm bellows and is connected to a guide portion, located farther away from the longitudinal center axis of the diaphragm bellows than the outer edges of said adjacent diaphragms, adapted for guiding on the inner surface of the tube surrounding the diaphragm bellows, and the guide portion surrounds the longitudinal center axis as a sleeve, wherein the holding portion as well as the guide portion are located, with respect to the axial direction, between the first and second end diaphragms and are axially distanced from the first and second ends of the diaphragm bellows.

13. The diaphragm bellows as claimed in claim 12 , wherein a thickness of the holding portion of the guide part is less than five times a thickness of the diaphragms between which the holding portion of the guide part is arranged.

14. The diaphragm bellows as claimed in claim 12 , wherein a thickness of the guide portion of the guide part is less than five times a thickness of the diaphragms between which the holding portion of the guide part, to which the guide portion is connected, is arranged.

15. The diaphragm bellows as claimed in claim 12 , wherein the guide portion is configured in a material-integral manner with the holding portion or with at least an individual part of the holding portion, or is cohesively connected to the holding portion.

16. The diaphragm bellows as claimed in claim 12 , wherein the diaphragms, located on both sides of the holding portion of the guide part, and the holding portion rest against one another in a completely compressed state of the diaphragm bellows.

17. The diaphragm bellows as claimed in claim 12 , wherein the diaphragm bellows has at least two guide parts.

18. The diaphragm bellows as claimed in claim 17 , wherein the guide parts that follow one another in the axial direction of the longitudinal center axis of the diaphragm bellows are spaced apart from one another in the axial direction of the longitudinal center axis even in a completely compressed state of the diaphragm bellows.

19. The diaphragm bellows as claimed in claim 12 , wherein the guide portion extends axially outside of a plurality of the diaphragms.

20. An arrangement comprising a diaphragm bellows having an inner through-opening and a rod passing through the inner through-opening in the diaphragm bellows, the diaphragm bellows comprising a plurality of diaphragms with outer edges and inner edges, said diaphragms that follow one another in an axial direction of the longitudinal center axis of the diaphragm bellows being welded to

Assignees

• Vat Holding Ag

Inventors

• Tatzreiter Wolfgang

Classifications

• F16J3/047

  Metallic bellows · CPC title

• F16K41/10 Primary

  with diaphragm, e.g. shaped as bellows or tube · CPC title

• F16L11/15 Primary

  corrugated (F16L11/16 takes precedence) · CPC title

• F16J3/048

  with guiding or supporting means · CPC title

• F16L51/026

  with interior reinforcement · CPC title