Buffer for a bumper
US4171839A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Jul 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R19/32
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A buffer for a bumper comprising an outer cylinder having its bottom closed and an inner cylinder fitted slidably into the outer cylinder and defined to be attached to the bumper at the tip thereof, a stopper being provided on the inner surface of the outer cylinder at the tip thereof for preventing the inner cylinder from being disconnected therefrom, an orifice and a check valve being provided at the heel of the inner cylinder for permitting exclusively to flow a fluid sealed in the outer cylinder to the inner cylinder therefrom, a free piston being provided in the inner cylinder for partitioning a gas sealed in the inner cylinder from the fluid sealed in the outer cylinder, and the fluid in the outer cylinder maintaining the gas under a compressed condition through the free piston at the heel of the inner cylinder, thereby allowing the free piston to displace in a damped speed to absorb the vibrations of an automobile attached with the bumper and to improve the stability of the automobile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.