Removing method of tube

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7297908
APP PUB NO 20050235473A1
SERIAL NO

11100568

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention provides a removing method of a tube. Upon removing a tube 3 increased in diameter and fixed to a tube-sheet 1, an inserted portion 3a which is fixed to a tube-hole 2 of the tube-sheet 1 is heated and then cooled, thereby reducing its diameter. The inserted portion 3a is loosened from the tube-hole 2. Then, a region 3h opposed to a groove 4 formed in an inner circumference of the tube-hole is heated to a red-hot state, and the tube 3 is stretched in its axial direction, the red-heated region 3h is stretched to reduce its diameter and cut the region 3h, thereby pulling out the tube 3 from the tube-sheet 1.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
DAI-ICHI HIGH FREQUENCY CO., LTD.TOKYO8

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kurokawa, Yuji Kawasaki, JP 15 152
Sato, Michio Kawasaki, JP 57 1219
Yoshida, Hirotaka Kawasaki, JP 13 52

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Chicago Bridge & Iron Company (1)
* 4421160 Shell and tube heat exchanger with removable tubes and tube sheets 18 1980
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
BABCOCK & WILCOX CANADA LTD. (3)
* 7322090 Explosive tube removal device 0 2005
* 2006/0156,527 Explosive tube Removal device 0 2005
* 7565727 Method of tube stub removal 1 2007
 
GE-HITACHI NUCLEAR ENERGY AMERICAS LLC (2)
* 8631563 Apparatus and method for removing a dry tube assembly from a nuclear reactor pressure vessel 0 2009
* 2010/0257,716 Apparatus and Method for Removing a Dry Tube Assembly From a Nuclear Reactor Pressure Vessel 0 2009
 
BABCOCK & WILCOX POWER GENERATION GROUP, INC. (1)
* 8240049 Tube stub removal apparatus 0 2009
* Cited By Examiner

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 May 20, 2019
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00