Non-skid wheel brake mechanism
US6092262A · kind A · utility
Inventor
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B2200/22
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A non-skid wheel brake mechanism includes a wheel body, a shaft part, left and right wheels each with a ring rim. The device includes an outer rim having an oval ring groove having upper and lower half portions. A substantially oval shaped shaft bore extends through the outer rim. A rim bore extends vertically through the outer rim to form an accommodating channel. The accommodating channel is in communication with the shaft bore. The ends of the wheel shaft is secured within the insert bores of the ring rims. An S-shaped spring plate is positioned inside the accommodating channel and extends into the shaft bore against the wheel shaft such that the ring rims are frictionally braked by the lower half portion of the oval ring groove. When the S-shaped spring plate is compressed further against the wheel shaft, the ring rims of the wheels move between the lower and upper half portions of the oval ring groove and are no longer in frictional contact with lower portion of the oval ring groove, thereby permitting rotation of the wheels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.