Frame-type car jack
US5603486A · kind A · utility
Inventor
Key dates
| Filing date | Sep 15, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F3/245
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved frame-type, manually-operated hydraulic car jack consists of a base, a pressure release valve, a socket, a lever, a hydraulic oil cylinder, a piston, a pair of pulling bars, a pair of links, a pair of pushing bars, a load-engaging head and a locking rod. A pair of horizontally aligned holes which have a diameter slightly larger than that of the locking rod are defined in the pushing bars. When the car jack is driven to lift a car supported by the car jack to a desired level, the locking rod is inserted into and extended through the holes on the pushing bars thereby to prevent an unintentional lowering of the car jack and the car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.