Abstract: A modular chair assembly includes a seat member and at least three support leg units. The seat unit includes a seat member which has a lower surface and an upper surface opposite to the lower surface. Each of the three support leg units is detachably mounted to the lower surface of the seat member, and includes an inner axle and a hollow tube sleeved on the inner axle. The inner axle and the hollow tube are made of different materials to permit the inner axle to have a larger anti-bending strength than the hollow tube. The inner axle includes a bottom end surface for being supported on the ground.

Abstract: A modular chair assembly includes a seat member and at least three support leg units. The seat unit includes a seat member which has a lower surface and an upper surface opposite to the lower surface. Each of the three support leg units is detachably mounted to the lower surface of the seat member, and includes an inner axle and a hollow tube sleeved on the inner axle. The inner axle and the hollow tube are made of different materials to permit the inner axle to have a larger anti-bending strength than the hollow tube. The inner axle includes a bottom end surface for being supported on the ground.

Abstract: A hinge includes a leaf unit, first and second action units and an axle unit. The leaf unit includes first and second leaves that are rotatable relative to each other. The first leaf has a first barrel. The second leaf has a second barrel. The first and second action units are co-rotatable with the first leaf. The axle unit includes a fixing member mounted in the second barrel and co-rotatable with the second leaf, and first and second axle constituents respectively associated with the first and second action units and co-rotatable with the fixing member.

Abstract: A damper device includes an outer cylinder, an inner cylinder disposed inside the outer cylinder and having an inner chamber, a lower open end, and an upper closed end wall with a vent hole, a piston disposed in the inner chamber and having a passageway, a check valve coupled to the passageway to permit only upward flowing of a working fluid in the inner chamber through the passageway, and a piston rod having a lower rod end disposed outwardly of the outer cylinder, and an upper rod mounted to permit the piston to slide with the piston rod. The sliding of the piston rod is dampened by sliding of the piston in the inner chamber. A hinge assembly including the damper device is also disclosed.

Abstract: A damper device includes an outer cylinder, an inner cylinder disposed inside the outer cylinder and having an inner chamber, a lower open end, and an upper closed end wall with a vent hole, a piston disposed in the inner chamber and having a passageway, a check valve coupled to the passageway to permit only upward flowing of a working fluid in the inner chamber through the passageway, and a piston rod having a lower rod end disposed outwardly of the outer cylinder, and an upper rod mounted to permit the piston to slide with the piston rod. The sliding of the piston rod is dampened by sliding of the piston in the inner chamber. A hinge assembly including the damper device is also disclosed.

Abstract: A hinge includes a leaf unit, two action units and an axle unit. The leaf unit includes first and second leaves that are rotatable relative to each other. The first leaf has a first barrel. The second leaf has a second barrel. The action units are co-rotatable with the first leaf. The axle unit includes a fixing member mounted in the second barrel and co-rotatable with the second leaf, and two axles respectively associated with the action units and co-rotatable with the fixing member.

Abstract: A process of making a wear-resistant actuating lever is disclosed. The wear-resistant actuating lever includes a lever body made of metal and an integrally molded cover layer made of a polytetrafluoroethylene-based material. The lever body includes a head segment having an upper major surface, a cam-forming surface, a through hole, and at least one upper concavity formed in the upper major surface. The integrally molded cover layer covers on the head segment and is molded thereon using plastic injection molding, and includes an upper portion covering an upper major surface, a cam portion covering a cam-forming surface, and an upper protuberance portion in the upper concavity.

Abstract: A hinge device includes a hinge and a clamping unit. The hinge includes a first leaf mounted on a first object, and a second leaf pivotably connected to the first leaf. The clamping unit includes bracing and pressure plates spaced apart from each other by a clamping space for accommodating a second object. The bracing plate is removably attached to the second leaf such that the second leaf can be shifted in two mounting positions, one where the bracing plate is removed from the second leaf and the second leaf is connected to the second object, and one where the bracing plate is attached to the second leaf and the second object is clamped by the bracing and pressure plates.

Abstract: A process of making a wear-resistant actuating lever is disclosed. The wear-resistant actuating lever includes a lever body made of metal and an integrally molded cover layer made of a polytetrafluoroethylene-based material. The lever body includes a head segment having an upper major surface, a cam-forming surface, a through hole, and at least one upper concavity formed in the upper major surface. The integrally molded cover layer covers on the head segment and is molded thereon using plastic injection molding, and includes an upper portion covering an upper major surface, a cam portion covering a cam-forming surface, and an upper protuberance portion in the upper concavity.

Abstract: A hinge assemblage includes a leaf mechanism, an actuating unit and a damping unit. The leaf mechanism includes a first leaf, and a second leaf pivotable relative to the first leaf such that the hinge assemblage is convertible between first and second states. The actuating unit is mounted to the leaf mechanism, and generates an actuating force during the conversion of the hinge assemblage. The damping unit is mounted to the leaf mechanism for generating a damping force. The damping force generated by the damping unit during the conversion of the hinge assemblage toward the first state is different from the damping force generated by the damping unit during the conversion of the hinge assemblage toward the second state.

Abstract: A cam-lock actuating device for use in a locking coupling assembly that couples two tubular members, includes an actuatable lever having a head pivotally mounted on a female tubular coupler, an angularly positioning member coupled to be turned with the head, and leading and trailing releasably retaining members independently disposed on at least one of the head and the angularly positioning member such that, during turning of the actuatable lever to an unlocked position, the trailing releasably retaining member can be held in partially locking engagement with a male tubular coupler to prevent complete removal of the male tubular coupler from the female tubular coupler while permitting gradual relief of internal pressure.

Abstract: An adjustable torque hinge includes a set hinge, a torque providing unit and a torque adjusting unit. The set hinge unit couples a first and second wing plate with a pivot pin. The first and second wing plates forms a pin joint with a first sleeve and second sleeve. The torque providing unit includes a torque spring to provide turn back recovery. A torque adjusting unit has a torque adjustment member. The first sleeve includes a first cam, and the torque adjustment member includes a second cam which couples with the first cam to drive the torque adjustment member to the torque spring. Conversion between the first and second sleeves enables the bearing hinge to be used in both directions, accumulating force both in normal and reverse directions to adjust the torque force for opening and closing operations.

Abstract: An adjustable torque hinge includes a set hinge, a torque providing unit and a torque adjusting unit. The set hinge unit couples a first and second wing plate with a pivot pin. The first and second wing plates forms a pin joint with a first sleeve and second sleeve. The torque providing unit includes a torque spring to provide turn back recovery. A torque adjusting unit has a torque adjustment member. The first sleeve includes a first cam, and the torque adjustment member includes a second cam which couples with the first cam to drive the torque adjustment member to the torque spring. Conversion between the first and second sleeves enables the bearing hinge to be used in both directions, accumulating force both in normal and reverse directions to adjust the torque force for opening and closing operations.

Abstract: A cam-lock actuating device for use in a locking coupling assembly that couples two tubular members, includes an actuatable lever having a head pivotally mounted on a female tubular coupler, an angularly positioning member coupled to be turned with the head, and leading and trailing releasably retaining members independently disposed on at least one of the head and the angularly positioning member such that, during turning of the actuatable lever to an unlocked position, the trailing releasably retaining member can be held in partially locking engagement with a male tubular coupler to prevent complete removal of the male tubular coupler from the female tubular coupler while permitting gradual relief of internal pressure.

Abstract: An easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members, includes a cam arm pivotally mounted or a female tubular coupler and extending thereinto for locking a male tubular end of one of the tubular members, a spring-loaded latch bolt movably mounted in the cam arm to engage a cavity of the coupler so as to lock the cam arm at a locking position, and a releasing lever pivotally mounted on the cam arm and coupled to the latch bolt such that, when the releasing lever is turned from a latched position to an unlatched position, the latch bolt is retracted and disengaged from the cavity.

Abstract: An easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members, includes a cam arm pivotally mounted on a female tubular coupler and extending thereinto for locking a male tubular end of one of the tubular members, a spring-loaded latch bolt movably mounted in the cam arm to engage a cavity of the coupler so as to lock the cam arm at a locking position, and a releasing lever pivotally mounted on the cam arm and coupled to the latch bolt such that, when the releasing lever is turned from a latched position to an unlatched position, the latch bolt is retracted and disengaged from the cavity.