Accumulator membrane for a hydraulic hammer

Patent metadata

Field	Value
Publication number	US-9151386-B2
Application number	US-201313839878-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

An accumulator membrane is disclosed. The accumulator membrane may include a generally cylindrical tube having a side wall with a first end a second end. A lip may be located at the first end, and may form a pocket with the side wall. An extension may protrude from the second end at an angle generally perpendicular to the lip and co-axial with the generally cylindrical tube.

First claim

What is claimed is:

1. An accumulator membrane, comprising:
a generally cylindrical tube having a side wall with a first end and a second end, wherein the second end of the side wall is thicker than the first end;
a lip located at the second end and forming a pocket with the side wall; and
an extension protruding from the first end at an angle generally perpendicular to the lip and co-axial with the generally cylindrical tube.

2. The accumulator membrane of claim 1 , wherein the generally cylindrical tube has a dial ratio equal to about 1.50 to about 3.00.

3. The accumulator membrane of claim 2 , wherein the dial ratio is about equal to 2.09.

4. The accumulator membrane of claim 1 , wherein the extension forms a first angle ratio equal to about 150 to about 450.

5. The accumulator membrane of claim 4 , wherein the first angle ratio is about equal to 294.

6. The accumulator membrane of claim 1 , wherein a wall thickness ratio of a thickness of the first end relative to the second end is equal to about 0.60 to about 1.00.

7. The accumulator membrane of claim 6 , wherein the wall thickness ratio is about equal to 0.89.

8. The accumulator membrane of claim 1 , wherein the accumulator membrane is fabricated from a 70 durometer rubber.

9. The accumulator membrane of claim 1 , wherein a second diameter ratio is equal to about 0.40 to about 0.90.

10. The accumulator membrane of claim 1 , further including a generally conical extension formed at the first end.

11. The accumulator membrane of claim 1 , wherein a thickness profile ratio of the extension is equal to about 1.59 to about 4.77.

12. The accumulator membrane of claim 1 , wherein the extension includes at least two radial protrusions.

13. The accumulator membrane of claim 1 , wherein a thickness profile ratio of the lip is equal to about 1.59 to about 4.77.

14. The accumulator membrane of claim 1 , wherein the lip includes at least two axial protrusions.

15. The accumulator membrane of claim 1 , wherein the lip substantially forms a J-shape with the cylindrical tube.

Assignees

• Caterpillar Inc

Inventors

• Moore Cody

Classifications

• B25D9/145 Primary

  for hydraulically actuated hammers having an accumulator · CPC title

• B25D2222/57

  Elastomers, e.g. rubber · CPC title

• F15B1/04 Primary

  Accumulators · CPC title

• F16L55/045

  specially adapted to prevent or minimise the effects of water hammer · CPC title

• B25D2209/002

  Pressure accumulators · CPC title