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公开(公告)号：US20200149673A1
公开(公告)日：2020-05-14
申请号：US16738354
申请日：2020-01-09
摘要： A hinged cover overlays an opening that provides access to a pressurized inversion drum. A releasable latch assembly holds the cover in a closed and locked position. The latch assembly comprises a plurality of first knuckles formed in the cover that are interlaceable with a plurality of second knuckles formed in the body adjacent the opening. The latch assembly further comprises a rotatable latch pin that may be installed within the first and second knuckles. The latch assembly is moved from an unlocked to a locked position by rotation of the latch pin within the knuckles.
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公开(公告)号：US20240142036A1
公开(公告)日：2024-05-02
申请号：US18406355
申请日：2024-01-08
CPC分类号： F16L55/18 , E05C3/04 , E05C9/08 , E05C19/002 , Y10T292/0866 , Y10T292/0892 , Y10T292/11
摘要： A hinged cover overlays an opening that provides access to a pressurized inversion drum. A releasable latch assembly holds the cover in a closed and locked position. The latch assembly comprises a plurality of first knuckles formed in the cover that are interlaceable with a plurality of second knuckles formed in the body adjacent the opening. The latch assembly further comprises a rotatable latch pin that may be installed within the first and second knuckles. The latch assembly is moved from an unlocked to a locked position by rotation of the latch pin within the knuckles.
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公开(公告)号：US11913570B1
公开(公告)日：2024-02-27
申请号：US17335297
申请日：2021-06-01
摘要： A system for breaking the skin friction between an underground pipe section and the surrounding soil. The system uses a pipe twisting device attached to one end of the pipe section. The pipe twisting device applies a torsional force to the pipe section so as to torsionally deform the pipe section. Such deformation breaks the skin friction between the pipe section and the surrounding soil. After the skin friction is broken along the entire length of the pipe section, an apparatus configured to apply an axial force to the pipe section pulls the pipe section out of the soil.
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公开(公告)号：US11619336B2
公开(公告)日：2023-04-04
申请号：US17022513
申请日：2020-09-16
摘要： A wire pulling assembly for pulling a wire carrying tooling through an underground environment. The pulling assembly includes a cyclical vise carried by one or more hydraulic cylinders attached to a frame. The cylinders have a pulling stroke and a retraction stroke. A powered reel is used to store the wire as it is removed from the ground. During a pulling stroke, the reel is hydraulically isolated such that cable is stripped from the reel with tension maintained in the cable. During a retraction stroke, a motor turns the reel to load excess cable onto the reel.
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公开(公告)号：US20210107074A1
公开(公告)日：2021-04-15
申请号：US17022513
申请日：2020-09-16
摘要： A wire pulling assembly for pulling a wire carrying tooling through an underground environment. The pulling assembly includes a cyclical vise carried by one or more hydraulic cylinders attached to a frame. The cylinders have a pulling stroke and a retraction stroke. A powered reel is used to store the wire as it is removed from the ground. During a pulling stroke, the reel is hydraulically isolated such that cable is stripped from the reel with tension maintained in the cable. During a retraction stroke, a motor turns the reel to load excess cable onto the reel.
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