A dual cam lever hose clamp may comprise: first and second cam lever clamps and upper and lower clamp halves. The cam lever clamps may move between a retaining position and release position. The upper and lower clamp halves may form a collar when opposing ends of the clamp halves fasten together via the cam lever clamps. The first cam lever clamp may comprise a first linkage pivotally coupled to a first end of the lower clamp half and a first cam lever pivotally coupled to the first linkage. The second cam lever clamp may comprise a second linkage pivotally coupled to a second end of the lower clamp half and a second cam lever pivotally coupled to the second linkage. The first and second cam lever clamps may comprise cam levers that cammingly engage cam locking surfaces on the upper clamp half to fasten and tighten the collar.

A dual cam lever hose clamp may comprise: first and second cam lever clamps and upper and lower clamp halves. The cam lever clamps may move between a retaining position and release position. The upper and lower clamp halves may form a collar when opposing ends of the clamp halves fasten together via the cam lever clamps. The first cam lever clamp may comprise a first linkage pivotally coupled to a first end of the lower clamp half and a first cam lever pivotally coupled to the first linkage. The second cam lever clamp may comprise a second linkage pivotally coupled to a second end of the lower clamp half and a second cam lever pivotally coupled to the second linkage. The first and second cam lever clamps may comprise cam levers that cammingly engage cam locking surfaces on the upper clamp half to fasten and tighten the collar.

A hose clamp includes an open ended ring body having a first engagement pin located at one end portion, a second engagement pin located at another end portion, and a retaining clip located adjacent the first engagement pin; and a connecting lever detachably attached to the ring body, and including a lever body having a first pivot notch located on one end, a second pivot notch spaced away from the first pivot notch, and a clipping slot located at another end. The first notch of the lever is connected to the first engagement pin of the ring, and the second notch is connected to the second engagement pin of the ring. When the lever is rotated relative to the ring body, the first notch pivots around the first engagement pin and the second notch of the lever pulls the second engagement pin around the first engagement pin.

A hose clamp includes an open ended ring body having a first engagement pin located at one end portion, a second engagement pin located at another end portion, and a retaining clip located adjacent the first engagement pin; and a connecting lever detachably attached to the ring body, and including a lever body having a first pivot notch located on one end, a second pivot notch spaced away from the first pivot notch, and a clipping slot located at another end. The first notch of the lever is connected to the first engagement pin of the ring, and the second notch is connected to the second engagement pin of the ring. When the lever is rotated relative to the ring body, the first notch pivots around the first engagement pin and the second notch of the lever pulls the second engagement pin around the first engagement pin.

A duct clamp assembly comprises a clamp configured to apply pressure around a connection point of two duct segments, and a gasket positioned on an inner surface of the clamp. The gasket comprises a body made of a foam and a layer made of a solid polymer, and the layer extends around an outer surface of the body.

A coupling device for coupling flanges of two pipes includes a chain assembly and a positioning mechanism. The chain assembly includes plural connecting pieces pivotally connected one by one by pivot members. The connecting pieces at two opposite ends of the chain assembly are defined as a first connecting piece and a second connecting piece. A first pivot member is arranged at the free end of the first connecting piece, and a second pivot member is arranged at the free end of the second connecting piece. The positioning mechanism includes a first portion and a second portion pivotally connected. The first portion is pivotally connected to the first pivot member or the first connecting piece, and the second portion is detachably positioned to the second pivot member. The first portion is rotatable between a release position and a fixed position relative to the second portion.

A hose connector apparatus for quick and easy dripless hose connection includes a first connector having a first inner end, a first outer end, and a first sidewall. The first outer end attaches to a first hose. The first inner end has a receiving cavity. A male clamp bracket is pivotably coupled to the first sidewall. A female clamp bracket is pivotably coupled to the male clamp bracket and has a female bracket distal end. A second connector has a second inner end, a second outer end, and a second sidewall. The second inner end has a protrusion portion slidably engageable within the receiving cavity of the first connector. The second outer end attaches to a second hose. A pair of locking pins is coupled to the second sidewall to selectively engage the female bracket distal end of the female clamp bracket.

A hose connector apparatus for quick and easy dripless hose connection includes a first connector having a first inner end, a first outer end, and a first sidewall. The first outer end attaches to a first hose. The first inner end has a receiving cavity. A male clamp bracket is pivotably coupled to the first sidewall. A female clamp bracket is pivotably coupled to the male clamp bracket and has a female bracket distal end. A second connector has a second inner end, a second outer end, and a second sidewall. The second inner end has a protrusion portion slidably engageable within the receiving cavity of the first connector. The second outer end attaches to a second hose. A pair of locking pins is coupled to the second sidewall to selectively engage the female bracket distal end of the female clamp bracket.

Thread-less and fastener-less hangers for a pipe or tube are provided. The hanger has arms that can be pivoted to an open position for receiving insertion of a pipe or tube between the arms, and to a closed position, in which the arms are positioned to grip and hold the pipe or tube. When the arms are in the closed position, a latch or cam mechanism engages the arms in a manner that locks the arms in the closed position thereby preventing pivoting of the arms and release of the pipe or tube. Hanger assemblies and methods of securing a pipe or tube to a hanger are also provided.

Thread-less and fastener-less hangers for a pipe or tube are provided. The hanger has arms that can be pivoted to an open position for receiving insertion of a pipe or tube between the arms, and to a closed position, in which the arms are positioned to grip and hold the pipe or tube. When the arms are in the closed position, a latch or cam mechanism engages the arms in a manner that locks the arms in the closed position thereby preventing pivoting of the arms and release of the pipe or tube. Hanger assemblies and methods of securing a pipe or tube to a hanger are also provided.