427S ECVT
938427SPK1/1-0121
5
4
Function
5
Maintenance
6
Limitations on Use
Intended life:
A local risk assessment should be carried out based upon activity and usage.
Lifting loads:
User weight and activity is governed by the stated limits.
Load carrying by the user should be based on a local risk assessment.
Environment
Avoid exposing the device to corrosive elements such
as water, acids and other liquids. Also avoid abrasive
environments such as those containing sand for example as
these may promote premature wear.
Exclusively for use between -15˚C and 50˚C (5˚F to 122˚F).
Maintenance must be carried out by competent personnel.
We recommend a regular visual check at least annually. Signs of wear that may affect function
should be reported to their service provider (e.g. significant wear or excessive discoloration from
long term exposure to UV).
Any changes in performance of this device must be reported to the practitioner.
Changes in performance may include:
• Increase in ankle stiffness
• Changes in axial or torsional stiffness
• Reduced ankle support (free movement)
• Softening of springs
• Excessive play in bearings
• Any unusual noise
The practitioner must also be informed of any changes in body weight and/or activity level.
Cleaning
Use a damp cloth and mild soap to clean outside surfaces. Do not use aggressive cleansers.
The device comprises a hydraulic body assembly containing adjustable hydraulic valves.
The valves can be independently adjusted to increase and reduce hydraulic resistance to
plantarflexion and dorsiflexion.
The proximal part of the hydraulic body assembly contains a spring component that allows
the pyramid tube to deflect and/or rotate through a limited range under an axial and/or
torsional load. When the load is removed the spring returns to its original position. The effect
of this movement is to attenuate any shock forces that would otherwise be transmitted to the
residuum/socket interface both in axial and rotational directions.
The hydraulic body assembly is connected to a carrier assembly via two pivot pins. Heel and toe
springs are attached to the carrier using titanium and stainless steel screws. The foot is wrapped
in a UHM PE sock which is in turn surrounded by a PU foot shell.
