Shock absorbing pile driver
US4262755A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1978 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Apr 10, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D7/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pile driver has a hollow and elongated cylindrical housing. Within the housing, a ram can slide upwardly and downwardly in order to provide the force which can drive a pile into dense strata of the earth. A follower, located partially inside the housing and extending out of the bottom therof, is struck by the ram and is thus interposed between the ram and the pile to be driven when the device is operated. Various devices are disclosed which serve as shock absorbers, the devices cooperating with the follower and with the housing in order to absorb recoil shock which is reflected back to the pile driver after a blow has been transmitted to the pile by the ram via the follower. These devices are so designed that the exterior diameter of the housing does not have to be substantially increased, which allows the pile driver thus manufactured to drive piles through surrounding guides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.