Manual lifts are the only wheelchair lifting devices that work without a source of power. If some car lifts can be operated by simple physical force, then residential lifts are usually powered by electricity or hydraulics.
Of course, electrical models are more common and less expensive. However, their main disadvantage is the fact that they depend on electricity. During a power outage, an electric wheelchair lift will be totally useless.
That’s why there are several models of hydraulic wheelchair lifts available on the market. By using the principles of fluid movement, these lifts function smoothly, without sudden impacts or changes of speed. The smoothness of movement is a great advantage for disabled people who are in pain because of their condition.
Besides the simple hydraulic lifts, there is also a combined model which uses both electricity and hydraulics. In this case, the power from a battery is employed to move the fluid through the hydraulic cylinders. As a consequence, the cylinders will move up or down, depending on the needs of the wheelchair user.
Besides being more expensive than electric lifts, the hydraulic devices are also heavier. This happens because of the weight of the fluids. At the same time, these lifts are more durable, stable and they make less noise during their functioning.
One of the major downsides of the hydraulic powered wheelchair lifts is the fact that they cannot operate under low temperatures. If the used fluids freeze because of the cold, the system may have leakages.
How do hydraulic lifts work?
The mechanism consists of several fluid-filled cylinders. When you activate the device, the liquid moves into the cylinders, forcing the inner rods to move. The rods are attached to the platform, which will be raised or lowered, depending on the necessities.
Hydraulic lifts, just like their electric ‘relatives’, have 3 control panels: on the lower and upper landing areas and on the platform. Thank to this feature, you’ll be able to operate the device without external assistance.
Which are the main types of hydraulic wheelchair lifts?
Similar to electric wheelchair lifts, hydraulic models are made for home use, commercial (or public) buildings and vehicles. Residential lifts are designed for indoor and outdoor use. However, usually manufacturers have to keep in mind the average temperatures of the area where the external lift will be installed – this can prevent the unwanted freezing of the mechanism. Commercial hydraulic lifts come in many various models. The main options are the portable devices and the fixed ones (which are larger).
If you consider buying a hydraulic lift for your car, residence of commercial building, assess carefully your exact needs and the structure of the intended place of installment. If you’re acquiring the lift for personal use, make sure that you know the size and weight of your wheelchair and don’t forget to tell this information to the manufacturer, who will help you choose the most suitable model. Also, keep in mind that home lifts can have various features as well: some are vertical (functioning like a miniature elevator), while others move on an inclined trajectory (along the staircase). Also check the safety features of the model – some platforms are open (which might be dangerous), while others are fully enclosed. In order to make sure that the hydraulic lift is safe, check if it meets the ADA standards.
Lastly, even if hydraulic lifts are more expensive, don’t try to save money on installation. In order to function properly and protect you from possible harm, these wheelchair lifts have to be installed by professionals.