Abstract: A hose coupling includes a hose coupling member and a cover. The cover includes a cover face and a connecting portion. The cover and the hose coupling member are locked through a locking structure. The locking structure includes a handle, an opening, and an annular limit groove. The annular limit groove is disposed around a circumferential wall of the connecting portion. The opening penetrates a side wall of the hose coupling member. One end of the handle is a curved limit portion to mate with the annular limit groove. The limit portion penetrates the opening to be engaged in the limit groove and is hinged on the hose coupling member through a pivot seat. The pivot seat includes a first seat and a second seat. Outer ends of the first seat and the second seat are each formed with a pin hole for a safety pin to be inserted therethrough.

Abstract: A hose coupling includes a hose coupling member and a cover. The cover includes a cover face and a connecting portion. The cover and the hose coupling member are locked through a locking structure. The locking structure includes a handle, an opening, and an annular limit groove. The annular limit groove is disposed around a circumferential wall of the connecting portion. The opening penetrates a side wall of the hose coupling member. One end of the handle is a curved limit portion to mate with the annular limit groove. The limit portion penetrates the opening to be engaged in the limit groove and is hinged on the hose coupling member through a pivot seat. The pivot seat includes a first seat and a second seat. Outer ends of the first seat and the second seat are each formed with a pin hole for a safety pin to be inserted therethrough.

Abstract: A hose coupling includes a hose coupling member and a cover. The hose coupling member is provided with an annular groove. A grip is provided on top of the cover. The cover is provided with two handles on two opposing sides of the cover. The cover is formed with through holes corresponding to the handles. One end of each handle is a curved limit portion and hinged on the cover. The curved limit portion passes through the corresponding through hole to engage with the annular groove. The seat is formed with a first pin hole for a safety pin to be inserted therethrough. Through the grip, the fluid hose can be dragged conveniently. The connecting structure of the hose coupling member and the cover is more stable, such that the cover can better protect the distal end of the fluid hose to prevent the cover from loosening.

Abstract: A safety locking device includes a locking lever pivotally connected to a pipe connector for locking a coupling member, a retaining plate pivotally connected to the pipe connector for stopping the locking lever in the locking position, a lock pin axially movably mounted in a lock hole in the locking lever for engagement with the retaining plate to stop the retaining plate and the locking lever in position, a spring member mounted in the locking lever to force the lock pin into engagement with the retaining plate, and a pull ring for pulling the lock pin from the retaining plate to unlock the locking lever.

Abstract: A safety locking device includes a locking lever pivotally connected to a pipe connector for locking a connection member to the pipe connector, a retaining plate pivotally connected to the pipe connector for stopping the locking lever in the locking position, a lock pin axially movably inserted through a longitudinal through hole on a protruding block of the locking lever for engagement with the retaining plate to stop the retaining plate and the locking lever in position, a spring member mounted in the longitudinal through hole to force the lock pin into engagement with the retaining plate, and a pull ring connected to the bottom end of the lock pin for a user to pull to disengage the lock pin from the retaining plate and to further unlock the retaining plate and the locking lever.

Abstract: A locking lever having a metal core plate and a plastic cover layer is disclosed. The metal core plate has a plate-like base, an expanded blunt head curving outwardly downwards, and a main through hole and a plurality of small bonding through holes cut through two opposite sides thereof. The plastic cover layer is molded on the core plate, filling up the small bonding through holes, and covers the whole surface area of the core plate to expose the peripheral edge of the expanded blunt head to the outside The plastic cover layer further has a T-shaped cross section at one end, a through hole corresponding to the main through hole of the core plate, a groove at a top side thereof, and a front end and a rear end respectively curved outwardly downwards.

Abstract: A hose coupling which includes a coupling body having two side openings and two pair of lugs at two opposite sides of each side opening, two locking levers pivotably coupled to the lugs at two opposite sides of the coupling body by a respective pivot and turned between a locking position to lock a plug/male connecting element in the coupling body and an unlocking position to release the plug/male connecting element, two retainer plates respectively coupled to the pivots and disposed outside the side openings of the coupling body and adapted to stop the locking levers in the locking position, and two spring and pin sets respectively mounted in stepped holes on the locking levers and adapted to engage with retainer plates in stopping the locking levers in the locking position, each spring and pin set having a knob for release control.

Abstract: A pipe joint is composed of a connection portion, two coupling handles and two auxiliary handles. The coupling handles and the auxiliary handles are fastened pivotally with two pivoting seats of the connection portion such that the coupling handles and the auxiliary handles are arranged side by side, and that the auxiliary handles can be actuated by the coupling handles in motion, and further that the auxiliary handles serve to avert the loosening of the connection portion at such time when the coupling handles are caught accidentally by a moving object or actuated accidentally by a person.