Patent ID: 9205718
Filing Date: 2015-12-08
Classification: B60G,F16F

Abstract:
1. A device for lifting a vehicle with a suspension system having a coil spring with a coil spring diameter, comprising: a hollow cylinder supporting said vehicle having a cylinder inner diameter larger than said coil spring diameter, with a cylinder top, cylinder top rim and cylinder side walls connected to and extending downwardly from said cylinder top rim to a cylinder bottom, wherein said cylinder top and said cylinder side walls define an inner cylinder bore, an inlet port extending into said cylinder, and an inner circumferential retaining ring groove at said cylinder bottom; a piston having a piston diameter less than said cylinder bore diameter, having a piston top, a piston top rim, and a piston lower circumferential rim with a rim diameter, mounted over said coil spring, and having a piston outer diameter and an outer circumferential piston-bore seal groove; wherein said piston is slidable within said cylinder bore; a substantially cylindrical piston skirt having a skirt inner diameter greater than said coil spring diameter and a skirt outer diameter less than said cylinder bore diameter, a skirt top and a skirt bottom, attached to said piston at said skirt top, wherein said piston diameter and said skirt outer diameter are sufficiently less than said cylinder bore diameter whereby said piston and said piston skirt can tilt within said cylinder bore by at least 5 degrees when said piston top is being assembled into said cylinder bore and said piston top becomes positioned entirely within said cylinder bore; a piston-bore seal retained in said piston-bore seal groove whereby said piston top, said cylinder top, said piston-bore seal, and said cylinder side walls form an expandable pressure space in said cylinder bore that is in fluid communication with said inlet port; a retaining ring retained in said inner circumferential retaining ring groove; whereby said device is activated when a pressurized fluid enters through said inlet port into said expandable pressure space and causes said piston and said cylinder to slide apart, thereby raising said vehicle, and deactivated when said pressurized fluid exits through said inlet port from said expandable pressure space and causes said piston and said cylinder to slide together, thereby lowering said vehicle.