Patent · US Expired

Apparatus for producing variable-rate spring

US4493631A · kind A · utility

3Cited by
5References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 15, 1983
Grant dateJan 15, 1985
Priority date
Expiry dateSep 15, 2003

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF16F2226/00
  • WIPO fieldOther special machines
  • WIPO sectorMechanical engineering

Abstract

An elastomeric spring is formed by extruding a rubbery material into a reinforcing sleeve in a mold during relative motion between the mold and nozzle, and thereafter vulcanizing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.