Spring loaded drop foot trailer jack
US4796864A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Oct 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60S9/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for adjustably supporting a portion of a wheeled vehicle, which apparatus may be retracted or disengaged from a supporting surface when the wheeled vehicle is put into use. A tubular outer housing is provided for attaching to the vehicle, with second and third tubular members slidably disposed therein. A locking mechanism is provided adjacent an aperture in a wall of the second tubular member for positioning a pin in selectively alignable apertures in a wall of the third tubular member, thereby preventing relative movement between the second and third tubular members. A tension spring engaging both second and third tubular members and located within the third tubular member is provided for biasing the third tubular member toward a retracted position with respect to the second tubular member. A cranking rod and threaded screw member are also disclosed for moving the second tubular member with respect to the tubular outer housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.