There is provided a tube coupling configured to connect and couple two tubes that are configured to cause a fluid to flow inside the two tubes. The tube coupling includes: a male connector including a first pipe configured to cause the fluid to flow inside the first pipe, and an insertion part having a protruding shape protruding in an axial direction that is an insertion direction; and a female connector including a second pipe configured to cause the fluid to flow inside the second pipe, and an insertion receiving part having a recessed shape recessed in the axial direction and coupled to the insertion part when the insertion part is inserted into the insertion receiving part. The insertion part includes a first spring, a first pressing member having a protruding shape, a first seal member having an annular shape, and a first outer peripheral member surrounding the first pressing member.

A pipe connector for use in conjunction with a catch basin, the pipe connector comprising: an annular flange defining a central bore; a major pipe receptor in the form of a tube having a first diameter and being attached to the flange; a minor pipe receptor in the form of a tube having a second diameter smaller than the first diameter, and being attached to the major pipe receptor by a frangible bridge that is configured to cleanly break upon the application of an impact to the minor pipe receptor, whereby the minor pipe receptor is removable from the major pipe receptor.

A fluid line connection for a manifold of a pneumatic distribution system for an agricultural air seeder. The fluid line connection has a male connector extending from the manifold and a plurality of threads on an exterior surface, a fitting connector configured to retain a primary tube thereon, the fitting connector defining a lip, and a locking ring having a plurality of threads and a receiving portion on an interior surface, the receiving portion configured to receive the lip to retain the fitting connector with the locking ring, and the plurality of threads of the locking ring configured to engage the plurality of threads on the male connector. The fitting connector is removable from the male connector by disengaging the locking ring without requiring axial movement of the fitting connector.

A fluid line connection for a manifold of a pneumatic distribution system for an agricultural air seeder. The fluid line connection has a male connector extending from the manifold and a plurality of threads on an exterior surface, a fitting connector configured to retain a primary tube thereon, the fitting connector defining a lip, and a locking ring having a plurality of threads and a receiving portion on an interior surface, the receiving portion configured to receive the lip to retain the fitting connector with the locking ring, and the plurality of threads of the locking ring configured to engage the plurality of threads on the male connector. The fitting connector is removable from the male connector by disengaging the locking ring without requiring axial movement of the fitting connector.

A check valve mounting structure includes a seat plate including a mounting hole and linked notches, a tubular bottom fitting with the top end thereof aimed at the mounting hole and having lugs extended from the periphery, and a holder block including a top receptacle, a shoulder and a bottom receptacle, which includes protruding portions outwardly extended from the periphery, first channels upwardly extended from the bottom side to a predetermined distance and second channels respectively and horizontally extended from the top ends of the first channels toward the periphery thereof. The bottom receptacle is attached onto the tubular bottom fitting, allowing the protruding portions to pass through the notches. The lugs are respectively inserted into the first channels and the second channels.

A check valve mounting structure includes a seat plate including a mounting hole and linked notches, a tubular bottom fitting with the top end thereof aimed at the mounting hole and having lugs extended from the periphery, and a holder block including a top receptacle, a shoulder and a bottom receptacle, which includes protruding portions outwardly extended from the periphery, first channels upwardly extended from the bottom side to a predetermined distance and second channels respectively and horizontally extended from the top ends of the first channels toward the periphery thereof. The bottom receptacle is attached onto the tubular bottom fitting, allowing the protruding portions to pass through the notches. The lugs are respectively inserted into the first channels and the second channels.

Modular armour is provided. The armour comprises a series of regularly-shaped armour elements and corresponding anchor elements releasably to anchor the armour elements to a platform. Each anchor element comprises an armour engaging section extending between first and second ends thereof, the first end being engageable with an armour mount on the platform and the second end including means releasably to secure the armour element, while engaged with the anchor element, to the platform. The platform may be fixed or mobile and includes land, water-born and air vehicles.

Modular armour is provided. The armour comprises a series of regularly-shaped armour elements and corresponding anchor elements releasably to anchor the armour elements to a platform. Each anchor element comprises an armour engaging section extending between first and second ends thereof, the first end being engageable with an armour mount on the platform and the second end including means releasably to secure the armour element, while engaged with the anchor element, to the platform. The platform may be fixed or mobile and includes land, water-born and air vehicles.

An article for connecting couplers during formation of matchcast concrete segments with an annular member with an outer surface, a first edge and a second edge opposite the first edge. A first slot formed in the outer surface opens to the first edge and extends angularly inwardly therefrom. A second slot is formed in the outer surface in spaced relation to the first slot and opens to the second edge and extends angularly inwardly therefrom. The first slot has a rectangular portion with a side opening to the first side of the annular member and a groove extending angularly from an opposite side of the rectangular portion. The second slot has a rectangular portion with a side opening to the second side of the annular member and a groove extending angularly from an opposite side of the rectangular portion.

An article for connecting couplers during formation of matchcast concrete segments with an annular member with an outer surface, a first edge and a second edge opposite the first edge. A first slot formed in the outer surface opens to the first edge and extends angularly inwardly therefrom. A second slot is formed in the outer surface in spaced relation to the first slot and opens to the second edge and extends angularly inwardly therefrom. The first slot has a rectangular portion with a side opening to the first side of the annular member and a groove extending angularly from an opposite side of the rectangular portion. The second slot has a rectangular portion with a side opening to the second side of the annular member and a groove extending angularly from an opposite side of the rectangular portion.