Title:
MANHOLE COVER AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2011/008011
Kind Code:
A2
Abstract:
Provided are a manhole cover and a method for manufacturing same, wherein the manhole cover maintains a strength and weight the same as those of conventional manhole covers made of cast iron, eliminates the risk of theft, and achieves improved corrosion resistance and sealing properties. The manhole cover comprises: a base unit made of composite materials having compositions containing 12 to 18 wt % of glass fiber, 17 to 23 wt % of a polyester resin, with the remainder being calcium carbonate (CaCO3), wherein the base unit is mounted on the manhole such that an upper portion of the base unit is exposed aboveground; and a metal reinforcement unit which is uniformly distributed within the base unit to reinforce the base unit and increase weight and strength of the base unit.
Inventors:
JANG, Jung Sik (1 Daewoo Apt, 457 Songnae-dong, Sosa-gu, Bucheon-si, Gyeonggi-do 422-040, 422-040, KR)
Application Number:
KR2010/004551
Publication Date:
January 20, 2011
Filing Date:
July 13, 2010
Export Citation:
Assignee:
JANG, Jung Sik (1 Daewoo Apt, 457 Songnae-dong, Sosa-gu, Bucheon-si, Gyeonggi-do 422-040, 422-040, KR)
International Classes:
E02D29/14; B28B7/00
Attorney, Agent or Firm:
CHO, Sung Je (3F YangWon Bldg, 1543-10 Seocho-dong, Seocho-gu, Seoul 137-070, 137-070, KR)