Leaf spring of plastic material and method for its manufacture
US4762307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1986 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Jun 23, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/774
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A leaf spring of plastic material having a spring body of fiber-reinforced plastic material, which at least at one end is provided with a thickening, with an end zone (1) of the spring body increasing in its thickness towards the spring end (5'). On this thickened end zone (1), a spring eye body (6, 19, 26) is wedged up at its appropriately laminar mounting zones with the aid of clamping sleeves. For the manufacture of the plastic material leaf spring, one advantageously starts with a spring body, the end zone (1) of which exhibits plane parallel top and bottom sides (2, 3), respectively, on which coatings of a plastic mass of fiber-reinforced duromer plastic material are applied to form the aforementioned thickening. Subsequently, the spring eye body (6, 19, 26) is mounted, and its mounting zones are wedged by means of the clamping sleeve(s) onto the spring body's end zone (1) provided with the coatings, whereby plastic material from these coatings appropriately penetrates the surface structure provided at the pressure surfaces of the mounting zones, whereupon the plastic coatings are cured at a higher temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.