Abstract: A pull pin assembly includes: a first pole having a first hole; a second pole having a second hole, and sliding in the first pole; a main body having a central hollow containing the first pole; a pull pin body extending radially from the central hollow, and having a space extending into the central hollow; a pull pin, having a circumferential stop, disposed in the space to move from a first position extending into the central hollow through the first hole to a second position outside the central hollow; a pull pin plug fit into the space and having a hollow containing the pull pin; and a biasing member biasing the pull pin toward the second position to lock the first and second poles; wherein the biasing member is disposed to bias the pull pin between the circumferential stop and the pull pin plug.

Abstract: A pull pin assembly with a first rod or pole, having a first hole and a second notch or hole, and a second rod or pole, having third hole, the second rod or pole being slidably contained within the first rod or pole, so that the first hole is superimposable on the second hole. A main body has a central hollow dimensioned to contain the first rod or pole, and has at least one resilient tab cut out from the main body. A boss on the tab extends into the central hollow to engage the second notch or hole of the first rod or pole. A pull pin body, integral with the main body, extends radially outward from the central hollow. The pin body has a space extending into the central hollow. A pull pin is slidably disposed in the space of the pull pin body to move from a first position extending into the central hollow through the first hole to a second position outside of the central hollow.

Abstract: A side rail assembly including a side rail having two ends, and a fixture. The fixture is configured to be fixed at one end of the side rail, and defines a central hollow dimensioned to fit snugly around one of the plurality of uprights. The fixture further has a socket for receiving one end of the side rail, and hinged member. The hinged member defines one wall portion of the central hollow. The fixture is slidable around the upright when the hinged member is in an open position and fixture is fixed around the upright when the hinged member is in a closed position. A wedge portion of the hinged member defines a portion of the central hollow. A slot, dimensioned to receive the wedge portion of the hinged member when the hinged member is in the closed position, is also provided on the fixture. Lastly, a locking member is provided which is disposed to lock the hinged member in the closed position.

Abstract: A side rail assembly including a side rail having two ends, and a fixture. The fixture is configured to be fixed at one end of the side rail, and defines a central hollow dimensioned to fit snugly around one of the plurality of uprights. The fixture further has a socket for receiving one end of the side rail, and hinged member. The hinged member defines one wall portion of the central hollow. The fixture is slidable around the upright when the hinged member is in an open position and fixture is fixed around the upright when the hinged member is in a closed position. A wedge portion of the hinged member defines a portion of the central hollow. A slot, dimensioned to receive the wedge portion of the hinged member when the hinged member is in the closed position, is also provided on the fixture. Lastly, a locking member is provided which is disposed to lock the hinged member in the closed position.

Abstract: A pull pin assembly includes: a first pole having a first hole; a second pole having a second hole, and sliding in the first pole; a main body having a central hollow containing the first pole; a pull pin body extending radially from the central hollow, and having a space extending into the central hollow; a pull pin, having a circumferential stop, disposed in the space to move from a first position extending into the central hollow through the first hole to a second position outside the central hollow; a pull pin plug fit into the space and having a hollow containing the pull pin; and a biasing member biasing the pull pin toward the second first position to lock the first and second poles; wherein the biasing member is disposed to bias the pull pin between the circumferential stop and the pull pin plug.