The present invention relates to a fluidic connection device, comprising a flange, and a nozzle through which passes a distal internal channel, and which is configured so as to be fluidically coupled to a complementary connection device. The nozzle, mounted in the flange with the possibility of tilting relative to the flange, comprises a rear end, and a front end. The invention also includes a rod comprising an intermediate internal channel; a front end, mounted in sealed cooperation with the rear end of the nozzle with the possibility of tilting of the rod relative to the nozzle and relative to the flange, for fluidic communication between the distal internal channel of the nozzle and the intermediate internal channel of the rod; and a rear end for fluidic communication between a proximal internal conduit and the intermediate internal channel.

Coupling systems for pipes that are press fit together in trenchless tunneling operations and which provide for the construction of curved pipelines can include a pipe with a pipe axis, a first end portion and a second end portion. The second end portion includes a female coupler having an inner wall surface and a set of coupler features formed on the inner wall surface, the coupler features including a plurality of teeth and a plurality of ramp surfaces between the teeth. The second end portion of the pipe includes a radially-extending distal end surface. The female coupler further includes a radially-extending shelf formed in the inner wall surface on an opposite side of the coupler features from the distal end surface. The distal end surface and the shelf are angled relative to a radially-extending reference line that is perpendicular to the pipe axis.

Coupling systems for pipes that are press fit together in trenchless tunneling operations and which provide for the construction of curved pipelines can include a pipe with a pipe axis, a first end portion and a second end portion. The second end portion includes a female coupler having an inner wall surface and a set of coupler features formed on the inner wall surface, the coupler features including a plurality of teeth and a plurality of ramp surfaces between the teeth. The second end portion of the pipe includes a radially-extending distal end surface. The female coupler further includes a radially-extending shelf formed in the inner wall surface on an opposite side of the coupler features from the distal end surface. The distal end surface and the shelf are angled relative to a radially-extending reference line that is perpendicular to the pipe axis.

A blower pipe comprises an intermediate pipe (a second pipe) including a circumferential positioning groove and an axial positioning groove, and a proximal pipe (a first pipe) including a first projection and a second projection on an outer peripheral surface thereof. The proximal pipe is connected to the intermediate pipe with the distal end portion of the proximal pipe being inserted in a proximal end opening of the intermediate pipe, the first projection being engaged with the circumferential positioning groove in a circumferential direction of the intermediate pipe, and the second projection being engaged with the axial positioning groove in an axial direction of the intermediate pipe.

A joint floating fixed seat structure includes a fixed seat, an adapter, a guiding sliding set, an abutting gasket and a spring. A receiving space is disposed inside the fixed seat, and the adapter penetrates the receiving space. The guiding sliding set is movably accommodated in the receiving space and sleeved on the adapter, which includes a sliding element that can move left and right and a guiding seat that can move up and down along the sliding element. The abutting gasket is sleeved on the adapter, the spring is located between the guiding sliding set and the abutting gasket and abuts against the abutting gasket and against the adapter by the abutting gasket to eliminate the influence of pre-pressure of the spring.

A pressure relief structure for floating joint includes a hollow fixed retainer having an open and a holed closed side; an adapter joint having a first section partially received in the fixed retainer and a second section extended through the open side to the closed side of the fixed retainer; a first slidable member fitted around the second section and radially slidably attached to an inner wall surface of the closed side; a spring fitted around the second section to pressed against the first slidable member and a shoulder portion formed between the first and second sections; a retaining ring fixedly fitted between the second section and the first slidable member; and a second slidable member connected to the second section and radially slidably attached to an outer wall surface of the closed side. The above structure allows radially deviated pipes to connect end to end with reduced contact friction.

A blind-mating floating clamp device includes a device body having two opposite side surfaces respectively provided a through hole penetrating the inside of the device body, and an elastic member assembled inside the device body, and a quick connector with the shank thereof movably inserted into the through holes of the device body. The diameter of each through hole is larger than the inner diameter of the elastic member or smaller than the outer diameter of the elastic member. The shank of the quick connector is movably held at the inner diameter of the elastic member, so that the docking portion located in the shank can be assembled with a corresponding preset adapter. It achieves elastic floating offset, rapid adjustment, convenient assembly and docking purposes, and the quick connector application is not easily restricted by the installation position.

A blind-mating floating clamp device includes a device body having two opposite side surfaces respectively provided a through hole penetrating the inside of the device body, and an elastic member assembled inside the device body, and a quick connector with the shank thereof movably inserted into the through holes of the device body. The diameter of each through hole is larger than the inner diameter of the elastic member or smaller than the outer diameter of the elastic member. The shank of the quick connector is movably held at the inner diameter of the elastic member, so that the docking portion located in the shank can be assembled with a corresponding preset adapter. It achieves elastic floating offset, rapid adjustment, convenient assembly and docking purposes, and the quick connector application is not easily restricted by the installation position.

A connector is mounted to a first object and connected between an outlet device and an inlet device to direct a fluid. The connector comprises: a housing mounted to the first object; a pipeline penetrating the housing in a flow direction of the fluid and comprising an outlet end connected to the outlet device and an inlet end connected to the inlet device; a floating device disposed on the housing and floatingly connected to the pipeline, allowing the pipeline to float in the radial direction transverse to a flow direction of the fluid with respect to the housing.