Elastomeric bushing with ferrule

Patent metadata

Field	Value
Publication number	US-12297883-B2
Application number	US-202217981905-A
Country	US
Kind code	B2
Filing date	Nov 7, 2022
Priority date	Nov 7, 2022
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

An elastomeric bushing comprises an inner sleeve including a first end face and an opposite second end face. An elastomeric bumper is disposed around and directly engages the inner sleeve. The elastomeric bumper includes an annular void. An outer sleeve is disposed around the inner sleeve and the elastomeric bumper, spaced apart from the inner sleeve, and directly engages the elastomeric bumper. A one-piece monolithic ferrule includes a cylindrical sidewall surrounding a portion of the inner sleeve, an end wall, and a collar. The end wall radially inwardly extends from the side wall and overlaps the first end face of the inner sleeve. The collar has an outer surface positioned within the outer sleeve and within the annular void to limit the radial extent of relative movement between the inner and outer sleeves.

First claim

What is claimed is:

1. An elastomeric bushing comprising:
an inner sleeve including a first end face and an opposite second end face;
an elastomeric bumper disposed around and directly engaging the inner sleeve, the elastomeric bumper including a first annular void and a spaced apart second annular void;
an outer sleeve disposed around the inner sleeve and the elastomeric bumper, the outer sleeve being spaced apart from the inner sleeve and directly engaging the elastomeric bumper, the outer sleeve including a first end and an opposite second end;
a one-piece monolithic first ferrule including a cylindrical sidewall surrounding a portion of the inner sleeve, an end wall, and a collar, the end wall radially inwardly extending from the side wall and overlapping the first end face of the inner sleeve, the collar having an outer surface positioned within the outer sleeve, within the first annular void, and radially outward of the sidewall, the outer surface being spaced apart from the elastomeric bumper; and
a one-piece monolithic second ferrule overlapping the second end face and surrounding a portion of the inner sleeve, the second ferrule including a collar positioned within the outer sleeve and within the second annular void.

2. The elastomeric bushing according to claim 1 , wherein radial movement of the outer sleeve relative to the inner sleeve is limited by the collar and the elastomeric bumper.

3. The elastomeric bushing according to claim 1 , wherein the inner sleeve is a hollow cylindrically-shaped one-piece monolithic component.

4. The elastomeric bushing according to claim 1 , wherein the elastomeric bumper is bonded to the inner sleeve.

5. The elastomeric bushing according to claim 1 , wherein the inner sleeve is coaxially aligned with the outer sleeve.

6. The elastomeric bushing according to claim 1 , wherein the inner sleeve axially extends beyond the outer sleeve at each end of the outer sleeve.

7. The elastomeric bushing according to claim 1 , wherein a load attempting to axially move the outer sleeve relative to the inner sleeve is reacted by the collar of the first ferrule after a space between the collar of the first ferrule and the elastomeric bumper is eliminated.

8. The elastomeric bushing according to claim 1 , wherein each of the end wall, the sidewall and the collar of the first ferrule have substantially the same thickness.

9. The elastomeric bushing according to claim 1 , wherein an inner surface of the outer sleeve is bonded to the elastomeric bumper.

10. The elastomeric bushing according to claim 1 , wherein the collar is shaped as a cylinder having an outer surface and an inner surface spaced apart from the both of the inner sleeve and the elastomeric bumper.

11. The elastomeric bushing according to claim 1 , wherein the first ferrule includes a radially extending flange interconnecting its sidewall and collar.

12. The elastomeric bushing according to claim 1 , wherein the first ferrule and the second ferrule are coaxially aligned.

13. An elastomeric bushing comprising:
an inner sleeve including a first end face and an opposite second end face;
an elastomeric bumper disposed around and directly engaging the inner sleeve, the elastomeric bumper including a circumferentially extending outer portion, a circumferentially extending inner portion and an intermediate web portion interconnecting the inner and outer portions, the intermediate portion having an axial length less than the inner and outer portions defining a first annular void and a spaced apart second annular void;
an outer sleeve disposed around the inner sleeve and the elastomeric bumper, the outer sleeve being spaced apart from the inner sleeve and directly engaging the elastomeric bumper, the outer sleeve including a first end and an opposite second end; and
a one-piece monolithic ferrule including a cylindrical sidewall surrounding a portion of the inner sleeve, an end wall, a radially extending flange and a collar, the end wall radially inwardly extending from a first end of the side wall and overlapping the first end face of the inner sleeve, the flange radially outwardly extending from a second end of the sidewall, the collar having an outer surface positioned within the outer sleeve and within the first annular void, the outer surface being spaced apart from the elastomeric bumper.

14. The elastomeric bushing according to claim 13 , wherein radial movement of the outer sleeve relative to the inner sleeve is limited by the collar and the elastomeric bumper.

15. The elastomeric bushing according to claim 13 , wherein the elastomeric bumper is bonded to the inner sleeve.

16. The elastomeric bushing according to claim 13 , wherein the inner sleeve is coaxially aligned with the outer sleeve.

17. The elastomeric bushing according to claim 13 , wherein the inner sleeve axially extends beyond the outer sleeve at each end of the outer sleeve.

18. The elastomeric bushing according to claim 13 , wherein a load attempting to axially move the outer sleeve relative to the inner sleeve is reacted by the collar after a space between the collar and the elastomeric bumper is eliminated.

19. The elastomeric bushing according to claim 13 , wherein each of the end wall, the sidewall, the flange and the collar of the ferrule have substantially the same thickness.

20. The elastomeric bushing according to claim 13 , wherein the collar is shaped as a cylinder having an outer surface and an inner surface spaced apart from the both of the inner sleeve and the elastomeric bumper.

Assignees

• Pullman Co

Inventors

• Bixler Michael

Classifications

• F16F1/3856

  Vulcanisation or gluing of interface between rigid and elastic sleeves · CPC title

• F16F2234/02

  cylindrical · CPC title

• F16F1/3828

  End stop features or buffering (F16F1/3807 takes precedence) · CPC title

• F16F1/3821 Primary

  characterised by adaptations to counter torsional forces · CPC title