Patent ID: 7757441

Claim:
An apparatus for isolating and leveling a machine foundation with respect to a substructure, comprising: an enclosure connectable to said machine foundation; a bearing member disposed within and adjustably connected to said enclosure; at least one primary support member comprising at least one spring within said enclosure positioned between said bearing member and said substructure for isolating said machine foundation from said substructure; and at least one secondary support member comprising an additional spring substantially similar to said at least one spring positioned between said bearing member and said substructure for isolating said machine foundation from said substructure, said secondary support member cooperating with said primary support member to support an applied load that includes at least the weight of said enclosure by distributing said applied load according to a proportional distribution by which said applied load is divided into a first load portion that is carried by said primary support member and a second load portion that is carried by said secondary support member, wherein said at least one secondary support member is adjustable independent of application of said applied load by an adjustment rod pressing a retainer cap against said additional spring to change said proportional distribution by adjusting the degree to which said at least one secondary support member compresses in response to a single, predetermined loading that is applied uniformly to said bearing member.