Fluid isolator assembly and floating elastomeric damping element

• US 7,178,794 B2
• Filed: 09/10/2003
• Issued: 02/20/2007
• Est. Priority Date: 09/10/2002
• Status: Expired due to Fees

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Runyon, John Frederick
• Primary Examiner(s): SICONOLFI, ROBERT
• Application Number:
  US10/659,616
• Publication Number:
  US 20040119213A1
• Time in Patent Office: 1,259 Days
• Field of Search: 267/64.27, 267/64.28
• US Class Current: 267/64.27
• CPC Class Codes: F16F 13/002 comprising at least one fluid spring F16F13/005, F16F13/02, F16F13/04 take precedence
• CPC Class Codes: F16F 15/0275 Control of stiffness

Abstract

An isolator apparatus is described to attenuate or isolate vibration. The isolator apparatus includes a fluid isolator assembly including a flexible diaphragm and a pressure chamber having a flow passage opened to the pressure chamber to provide a fluid spring. A floating isolator body including an elastomeric damping element is floatably interfaced with the flexible diaphragm of the fluid isolator assembly to isolate vibration.

Claims

1. An isolator comprising a first damping member supported by a central membrane portion of an inflatable flexible diaphragm that defines only one continuous convex surface in relation to the damping member when the diaphragm is operably inflated, the diaphragm thereby providing substantially similar spring rates in the horizontal and vertical directions when operably inflated.

2. The isolator of claim 1 wherein the damping member comprises first and second rigid plates spatially separated by an elastomeric element.

3. The isolator of claim 2 wherein the plates define receiving features mating with the elastomeric element, laterally supporting the plates with respect to each other.

4. The isolator of claim 1 wherein the flexible diaphragm comprises a non-elastic flexible fabric.

5. The isolator of claim 1 further comprising a base configured to selectively inflate the diaphragm.

6. The isolator of claim 1 further comprising a cradle defining a cavity receivingly engaging the flexible diaphragm, the cradle defining an extended load support tat is contactingly engageable with a load on the first damping member when the diaphragm is operably deflated.

7. The isolator of claim 1 wherein the convex surface is frusto-conical.

8. An isolator assembly that is adapted for damping simultaneously both high frequency and low frequency vibration by supporting a portion of a machine tool on a floating elastomeric member that is pressingly engageable against a flexible membrane portion of a continuous convex diaphragm that operably provides substantially similar horizontal and vertical spring rates.

9. The isolator assembly of claim 8 wherein the diaphragm is frusto-conical.