GB641316A - Improvements relating to rubber springs - Google Patents

Abstract

641,316. Rubber springs. PIRELLI SOC. PER AZIONI. April 12, 1948, No. 10139. Convention date, Nov. 25, 1939. [Class 108(iii)] In a rubber spring of the type comprising a series of rubber elements or sets thereof extending in the direction of the applied load when the spring is in use, and each element or set being separated from the element or set adjacent to it in the series, by an intervening rigid member, not connected to the rubber elements, the latter are formed with internal or external grooves or cavities of such pronounced dimensions as to result in the elements being subjected in the use of the spring, not only to compression stress but also to substantial shear flexion stress. In the arrangement according to Fig. 6, the spring comprises four sets of rubber elements, each set comprising two circular elements 10, 11, each of V-shaped crosssection and each set being separated from an adjacent set by annular metal discs 4, 7, 8. Upper and lower discs 3 and 9 engage the upper and lower elements respectively. The rubber elements are located between the discs by means of ribs 1, 2, which are formed on the discs 3 and 4 and engage channels formed in the upper elements, and by recesses 6 formed in the discs 7, 8, 9 which engage the lower elements. In another arrangement (Fig. 7, not shown) comprising upper and lower sets of annular rubber elements, each set consists of three elements of V-shaped cross-section with the V of each element of the upper and lower sets oppositely disposed. In a further arrangement, (Fig. 8, not shown), a combination of non-circular elements is employed. The cross-section of the rubber elements, whether curved, circular or rectilinear, may conform to the section of any of the elements shown on Figs. 1-5.