Bottle jack anti-bind structure for rectangular lift post
US4262881A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jul 25, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F3/25
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Anti-binding structure for jacks is provided which eliminates load-induced binding between an extended jack lift post and the guide structure therefor, so as to facilitate smooth jack operation. The jack of the invention preferably includes a rectangular or sqaure cross section lift post and a plurality of elongated, transversely U-shaped bearing channels respectively disposed between the planar post faces and the upper guide plate of the jack; the channels are each mounted for limited rocking movement about respective axes transverse to the longitudinal axis of the jack post so that any load-induced canting or deflection of the post can be safely accommodated without binding or galling thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.