METAL MANHOLES

Brand Owner (click to sort) Address Description
CAMPRESSION EJ GROUP, INC. 301 Spring Street East Jordan MI 49727 METAL MANHOLES; METAL MANHOLE COVERS AND FRAMES;
ERGO EJ GROUP, INC. 301 Spring Street East Jordan MI 49727 METAL MANHOLES; METAL MANHOLE COVERS AND FRAMES;
HINGECO EJ GROUP, INC. 301 Spring Street East Jordan MI 49727 METAL MANHOLES; METAL MANHOLE COVERS; METAL MANHOLE FRAMES;
MPIC EJ GROUP, INC. 301 Spring Street East Jordan MI 49727 METAL MANHOLES; METAL MANHOLE COVERS FEATURING PICK SLOTS AND PICK HOLES;
SELFLEVEL EJ GROUP, INC. 301 Spring Street East Jordan MI 49727 METAL MANHOLES; METAL MANHOLE COVERS AND FRAMES;SELF LEVEL;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. Two metal blocks (50, 52) are welded to respective metal sheets (30, 32) to form sealed assemblies. The sealed assemblies are then diffusion bonded together to form two metal preforms (54, 56). The thick ends (36) and (40) of the metal sheets (30, 32) and the metal blocks (50, 52) are hot formed so that a continuation of the plane X of the first surfaces (42, 46) of the metal sheets (30, 32) extends through and across the metal blocks (50, 52). The metal preforms (54, 56) are machined to remove the portion of the metal blocks (50, 52) extending above the first surfaces (42, 46) of the metal sheets (30, 32) respectively. The metal preforms (54, 56) and a metal sheet (58) are assembled into a stack (64). The metal preforms (54, 56) and the metal sheet (58) are diffusion bonded together and then superplastically formed to produce a hollow fan blade (10). The method enables thinner metal workpieces with better microstructure to be used and increases the yield of metal workpieces.