Swiveling wheel assembly for a cart
US5263226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B2200/43
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A swivelling wheel assembly containing a wheel whose swivelling action around a vertical axle may be locked or unlocked by rotating the wheel in one direction or the other. A curved double control lever is housed in a space between the thrust bearing and the tread of the wheel in the area of the lateral extensions of the fork joint. A lower lever arm holds a friction device engaging the tread of the wheel. An upper lever arm contains a locking means which can be received in a locking slot constructed in a housing component which is fixed relative to the pivot axle. A circular cover of the fork joint contains a tracking groove to guide the upper lever arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.