Hydraulic leveling cylinder
US8181937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2011 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Jul 25, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/1438
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An anodized aluminum hydraulic leveling cylinder 10 for a vehicle includes an extruded hollow body 20 having a vehicle attachment portion 24 for attaching the body to the underside of a vehicle. A piston 80 is slidably fitted into the interior of the body. The piston is formed of ductile aluminum capable of being machined to a desirable shape and dimensions. The piston is hard anodized and PTFE coated for durable and silent operation. Hydraulic oil passage means 23a, 23b is formed in the body, and a cap 50 with a pair of dual flow-through passages 53 is attached to the top end 30 of the body for permitting the flow of pressurized hydraulic oil into and out of the interior of the body to effect axial movement of the piston. Hydraulic fluid may be transferred through one or more hollow mounting bolts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.