×

Frost damage proofed pile

  • US 4,818,148 A
  • Filed: 03/07/1988
  • Issued: 04/04/1989
  • Est. Priority Date: 05/14/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A frost damage proofed pile comprising:

  • a pile member,a smooth-surfaced plastic covering member having a low coefficient of friction and being formed on an outer surface of said pile member, integral with said pile member, to surround a predetermined length of said pile member for reducing a frost heaving force or negative friction acting on said pile member when said covering member is in contact with frozen soil in a frigid area, andadhesion means for closely adhering said covering member to said pile outer surface within said predetermined length to a degree greater than a shear stress generated on said outer surface by said frozen soil.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×