Title:
DAMPER ADJUSTMENT MECHANISM
Document Type and Number:
WIPO Patent Application WO1999034128
Kind Code:
A9
Abstract:
A damper comprises a piston (1), including a port (5) for allowing fluid flow through the piston (1) from a first face (14) to a second face (7). A valve shim (6) mounted on the second face (7) of the piston covers the port (5) and is deformable to allow the flow of damping fluid through the port (5). Means (4) are provided for clamping an area of the valve shim (6) against the second face (7) of the piston, the clamping means (4) being adjustable to increase or decrease the area of the valve shim (6) that is clamped. Preferably, the valve shim (6) is generally disc-shaped; the clamping means (4) clamping an area of the valve shim (6) within an effective radius and being adjustable to change the effective radius. By changing the clamped area of the valve shim (6), deformation of the shim is aided or hindered, thus adjusting the damping characteristics of fluid flow through the port (5). Only a moderate and uniform force is needed to change the clamping area, thus avoiding damage to the mechanism and allowing a linear and repeatable response from the adjustment mechanism.
Inventors:
ANDERSON RICHARD FRANKLIN (GB)
FRASER DUNCAN RICHARD (GB)
NEWBOULD ANDREW PAUL (GB)
FRASER DUNCAN RICHARD (GB)
NEWBOULD ANDREW PAUL (GB)
Application Number:
PCT/GB1998/003886
Publication Date:
August 10, 2000
Filing Date:
December 23, 1998
Export Citation:
Assignee:
PILOT PRECISION DAMPERS LIMITE (GB)
ANDERSON RICHARD FRANKLIN (GB)
FRASER DUNCAN RICHARD (GB)
NEWBOULD ANDREW PAUL (GB)
ANDERSON RICHARD FRANKLIN (GB)
FRASER DUNCAN RICHARD (GB)
NEWBOULD ANDREW PAUL (GB)
International Classes:
F16F9/348; F16F9/44; F16F9/46; (IPC1-7): F16F9/348; F16F9/44
Download PDF:
Previous Patent: WHEEL BEARING ARRANGEMENT
Next Patent: TORSIONAL DAMPER, IN PARTICULAR FOR LOCKUP CLUTCHING OF A HYDROKINETIC COUPLING APPARATUS
Next Patent: TORSIONAL DAMPER, IN PARTICULAR FOR LOCKUP CLUTCHING OF A HYDROKINETIC COUPLING APPARATUS