Pinless jack
US5692730A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Nov 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S254/01
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
This invention relates to the construction of a pantograph jack and, in particular, to an improvement in the construction of a pantograph jack wherein the pins connecting the arms to the base and load rest of the jack are replaced with extrusions emanating from those parts. In particular, the pantograph jack of this invention has four arms, including two lower arms, and two upper arms. Each of the lower arms has a gear end to rotate with respective gear ends mounted in a base, meshing to control the rotation of one lower arm with respect to the other lower arm. Each of the upper arms has a gear end mounted in a load rest to rotate with the gear ends of both upper arms meshing to control the rotation of one upper arm with respect to the other upper arm. The improvement comprises axles extruded at positions on axes of rotation of one or more of the gear ends, and the axles providing means to mount the arms in the base or the load rest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.