Process and apparatus for insertion of robots in gas distribution systems
Patent 5660202 Issued on August 26, 1997. Estimated Expiration Date: 
August 26, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 26, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.InventorsAssigneeApplicationNo. 167772 filed on 12/15/1993US Classes:137/318, With aperture forming means137/240, With separate material addition138/94, Laterally insertable138/97REPAIRINGExaminersPrimary: Walton, George L.Attorney, Agent or FirmInternational ClassesF16K 043/00F16L 055/18 F16L 055/26 AbstractA hot tap apparatus for insertion of a controllable device into an in-service pipeline comprising a housing adapted to be sealably secured to a pipe and enclose a portion of the pipe. The housing forms a chamber which is partitioned into an insertion chamber and a discharge chamber, the insertion chamber being disposed adjacent to an insertion end of the housing and the discharge chamber being disposed adjacent the discharge end of said housing. The insertion end of the housing is sealable. The apparatus further comprises a cutting apparatus for cutting an opening in the pipe sized to receive the controllable device disposed in the housing. | |
