Title:
【発明の名称】拡開可能なプラグ及び制御方法
Document Type and Number:
Japanese Patent JP3398153
Kind Code:
B2
Abstract:
PCT No. PCT/AU94/00784 Sec. 371 Date Aug. 14, 1996 Sec. 102(e) Date Aug. 14, 1996 PCT Filed Dec. 21, 1994 PCT Pub. No. WO95/17642 PCT Pub. Date Jun. 29, 1995The invention provides, in a first form, an expandable plug for regulating pressure or flow within a tube. The plug has an inflatable bladder (12) for diametral expansion by internal fluid pressure introduced by inlet (14). The plug is reinforced by an envelope (26) of cords (28) which spread laterally upon inflation of the bladder to provide diametral support to the bladder. In a second form of the invention, an inflatable plug positioned in a tube of internal diameter d is controlled according to the equation Pp= DELTA P+Pd wherein Pd is the internal pressure in the plug, DELTA P is the differential pressure across the plug and Pd is the plug free expansion pressure for diameter d.
Inventors:
Chapman, Peter Granville
Wallis, Alan Kenneth
Cowling, Leslie Herbert
Wallis, Alan Kenneth
Cowling, Leslie Herbert
Application Number:
JP51639695A
Publication Date:
April 21, 2003
Filing Date:
December 21, 1994
Export Citation:
Assignee:
Vinidex Proprietary Limited
Uponol Innovation Activolag
Uponol Innovation Activolag
International Classes:
B22F3/11; B22F7/00; F16K7/10; F16L55/12; F16L55/128; F28F13/00; F28F13/18; F28F21/08; (IPC1-7): F16L55/12; F16K7/10
Domestic Patent References:
| JP5110606Y2 |
Other References:
【文献】米国特許4883094(US,A)
【文献】米国特許4614206(US,A)
【文献】米国特許4467835(US,A)
【文献】米国特許2794197(US,A)
【文献】米国特許3459230(US,A)
【文献】米国特許4614206(US,A)
【文献】米国特許4467835(US,A)
【文献】米国特許2794197(US,A)
【文献】米国特許3459230(US,A)
Attorney, Agent or Firm:
Soga Doteru (6 people outside)
Mitsuteru Soga (7 outside)
Mitsuteru Soga (7 outside)