Screw drive six link side lift vehicle jack assembly
US4720081A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1987 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Apr 29, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F3/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A jack assembly which is adapted to engage a side frame of an automotive vehicle for the purpose of raising and lowering the same relative to its adjacent ground surface comprises a base for engaging the ground surface and which has a pair of upwardly extending sides having horizontally disposed slots therethrough, a main support link having one end pivotally connected to the sides of the base via a pivot means extending through the slots and having its other end pivotally connected to a screw nut means, a lift arm having one end pivotally connected to the main support link and its other end connected to a bearing means rotatably supporting a screw which is also threadably engaged with the screw nut means carried by the main support link, a positioning link having one end pivotally connected to the base and its other end pivotally connected to the lift arm and follower links having one end pivotally connected to the positioning link and its other end pivotally connected to the pivot means connecting the main support link to the base, and with the length of the positioning link and following links and the locations of their respective pivotal connections with the lift arm and positi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.