A method of connecting a pipe to a cast fitting, the method can include casting a body including a first body end and a second body end disposed opposite from the first body end, wherein the body defines an axis extending from the first body end to the second body end, wherein the body includes a first neck disposed proximate to the first body end wherein the body further includes an inner body surface defining a bore extending through the body from the first body end to the second body end, and wherein the body further includes an outer body surface spaced from the inner body surface a predetermined wall thickness.

A method of connecting a pipe to a cast fitting, the method can include casting a body including a first body end and a second body end disposed opposite from the first body end, wherein the body defines an axis extending from the first body end to the second body end, wherein the body includes a first neck disposed proximate to the first body end wherein the body further includes an inner body surface defining a bore extending through the body from the first body end to the second body end, and wherein the body further includes an outer body surface spaced from the inner body surface a predetermined wall thickness.

Each of mechanical seal devices 7 of a rotary joint 1 includes a first shaft side seal ring 71 and a second shaft side seal ring 72 attached to a shaft body 5, and a first case side seal ring 73 and a second case side seal ring 74 attached to a case body 2. The first shaft side seal ring 71 and the second shaft side seal ring 72 have contact surfaces 71b and 72b axially facing each other and coming into contact with each other, and grooves 421c and 421d for forming a second communication flow passage 42 connecting a second outer flow passage 32 and a second inner flow passage 62 are formed in both the contact surfaces 71b and 72b.

A rotary multiport greasing valve having an outer sleeve and an inner sleeve within the outer sleeve. The outer sleeve has at least one inlet port and at least 2 outlet ports. The inner sleeve has an inlet port, a central passageway, and an outlet port. The inner sleeves inlet port is fluidly connected to the outer sleeve's inlet port. The inner sleeve rotates within the outer sleeve so that the inner sleeves outlet port is circumferentially aligned with a selected outer sleeve outlet port creating a fluid pathway from the outer sleeve inlet port into the inner sleeve's inlet port through the central passageway through the inner sleeves outlet port and finally through the outer sleeves outlet port to create an open flowpath. In the instance where a closed flowpath is desired the inner sleeve inlet port is rotated so as not to align with any portion of an outlet sleeve outlet port.

A swivel joint for a construction machine can detect a slewing angle of an upper slewing body and has a high maintainability. The swivel joint includes a body, a stem, a lower cover, and a sensor unit. The sensor unit includes: a rotation angle sensor fixedly attached to an upper end of the stem; and a rod having a distal end provided with a detection target to be detected by the rotation angle sensor and a proximal end fastened to the lower cover. The stem is formed with: a rod insertion hole for receiving the rod to be inserted therethrough; and a stem-side drain oil passage for allowing a drain oil to pass therethrough.

Each of mechanical seal devices of a rotary joint includes a seal ring and a seal ring attached to a shaft body, and a seal ring and a seal ring attached to a case body. A flow passage that partitions an annular space and connects a flow passage and a flow passage is formed between a sliding portion of the seal rings and a sliding portion of the seal rings. A flow passage that partitions the annular space and connects a flow passage and a flow passage is formed between the sliding portion of a mechanical seal device disposed on one side in the axial direction and the sliding portion of a mechanical seal device disposed on the other side in the axial direction in mechanical seal devices adjacent to each other in the axial direction.

Each of mechanical seal devices of a rotary joint includes a seal ring and a seal ring attached to a shaft body, and a seal ring and a seal ring attached to a case body. A flow passage that partitions an annular space and connects a flow passage and a flow passage is formed between a sliding portion of the seal rings and a sliding portion of the seal rings. A flow passage that partitions the annular space and connects a flow passage and a flow passage is formed between the sliding portion of a mechanical seal device disposed on one side in the axial direction and the sliding portion of a mechanical seal device disposed on the other side in the axial direction in mechanical seal devices adjacent to each other in the axial direction.

A fluid swivel includes at least two separate fluid paths extending therethrough, configured to convey fluid across a hinge. The fluid swivel includes a first end configured to be coupled to a first pair of lines on a first side of the hinge, a second end configured to be coupled to a second pair of lines on a second side of the hinge, a joint between the first end and the second end, a first pair of tubes extending from the first end to the joint, and a second pair of tubes extending from the joint to the second end, wherein the first and second tubes lie in a plane that is generally perpendicular to an axis of rotation of the joint.

A fluid conduit connector system includes a first body having a neck extending from a first side, an opening in the neck, and a bore extending from the opening. The fluid conduit connector system further includes a second body having second and third sides, an opening in the second side, a bore extending from the opening, and an array of holes positioned around the bore and extending from the second side to the third side. Upon assembly, the bore of the first body is aligned with the bore of the second body, the second side of the second body is disposed adjacent to the neck, a tension flange is disposed around the neck, and a plurality of connection rods is coupled to the tension flange, each connection rod disposed in a corresponding hole of the array of holes and extending out of the third side of the second body.

A fluid activated continuous roll joint apparatus for use in various robotic applications. The continuous roll joint apparatus can include an outer housing, a plurality of collapsible hoses, and a rotor assembly. The outer housing can include a cylindrical inner cavity. The plurality of collapsible hoses can be disposed around a perimeter of at least a portion of the cylindrical inner cavity. The rotor assembly can include a plurality of rollers distributed radially around a rotor frame, where each roller of the plurality of rollers can be positioned to engage (pinch) a collapsible hose of the plurality of collapsible hoses. In an example, the continuous roll joint is activated when fluid is pumped through the plurality of collapsible hoses. Which rotates the rotor through inaction between the collapsible hoses and the rollers.