公开(公告)号：US3589668A

公开(公告)日：1971-06-29

申请号：US3589668D

申请日：1968-10-17

申请人： SANFORD E COBLITZ

发明人： GILL JOHN B

IPC分类号： F16K7/06

CPC分类号： F16K7/061 ,  Y10T24/44598

摘要： A pipe shutoff tool, operable from above the surface of the ground, for squeezing closed a section of plastic pipe located below ground level. The tool includes a handle assembly coupled to a closure assembly so that opposingly mounted die members carried on the closure assembly may be moved into and out of engagement by jack means operable from the handle assembly. A die-positioning linkage extends from the handle assembly to one of the die members and is operable to rotate one of the die member between a first position, associated with squeezing shut the pipe, and a second position associated with mounting the tool onto the pipe. The tool further comprises separate spring devices centered on opposite faces of one die member for laterally and axially centering the tool on the pipe.

公开(公告)号：US3540329A

公开(公告)日：1970-11-17

申请号：US3540329D

申请日：1969-02-11

申请人： SANFORD E COBLITZ

发明人： GILL JOHN B

IPC分类号： B23B5/16 ,  B28B21/92

CPC分类号： B28B21/92 ,  B23B5/162 ,  Y10T82/22