
    429 A.2d 757
    Muller etc., et al., Appellants v. Midstates Equipment Service et al.
    Argued June 12,1980.
    Susan B. Bolno, for Muller, appellants; Louis S. Criden, for Midstates, appellee; John W. Frazier, IV, for Mobil Oil, appellee; Joseph F. Van Horn, Jr., for McNichol et al., appellees.
    Before BROSRY, HOFFMAN and CIRILLO, JJ.
    
    
      
       Judge Vincent A. Cirillo, of the Court of Common Pleas of Montgomery County, Pennsylvania, is sitting by designation.
    
   Order of the lower court granting summary judgment in favor of Mobil Oil Corporation is hereby affirmed.  