Abstract: A system for communicating between redundant devices balances the desired attributes of a high availability (HA) control system and a safety control system. The system includes concurrent connections as a fault tolerant mechanism for industrial protocol connections at the transport layer. The concurrent connections establish multiple paths for redundancy from a data producer to a data consumer. Concurrent connections increase availability of the HA control and safety instrumented systems. More specifically, concurrent connections and architectural redundancies eliminate a single point of failure within the control system and further reduce safety connection timeouts during fault detection and/or recovery. Concurrent connections may be used to keep a HA system operational or to provide detection of a failure in a safety system. The industrial control network may be configured to function as a HA control system, as a safety control system, or with certain degrees of both HA and safety-related operation.

Abstract: A journal for coupling a wheel to an axle is configured to be mounted in a bore of the wheel. The journal defines a reception space for receiving an axle. A locking element is pivotally mounted on the journal from a release position in which the axle is removable from the reception space and secured position in which a tooth of the locking element is engaged with a groove in the axle. When the tooth of the locking element is engaged in the groove withdrawal of the axle is prevented.

Abstract: A journal for coupling a wheel to an axle has a main tubular body portion with a reception space for the axle and a separate locking element. The locking element is mounted in a cradle for pivotal movement about a pivot axis from a release position in which the axle is removable from the reception space to a position in which the axle is secured in position is the reception space. A biasing member such as a magnet, a spring or a tube of resilient material biases the locking element into the secured position.

Abstract: A journal 6 for coupling a wheel 1 to an axle 5 has a main tubular body portion 14 with a reception space 100 for the axle 5 and a separate locking element 10. The locking element 10 is mounted in a cradle 21 for pivotal movement about a pivot axis from a release position in which the axle 5 is removable from the reception space 100 to position in which the axle 5 is secured in position in the reception space 100. A biassing member such as a magnet 60, a spring 37 or a tube 50 of resilient material biases the locking element 10 into the secured position.

Abstract: A journal 6 for coupling a wheel 1 to an axle 5 is configured to be mounted in a bore 4 of the wheel 1. The journal 6 defines a reception space 100 for receiving an axle 5. A locking element 10 is pivotally mounted on the journal 6 from a release position in which the axle 5 is removable from the reception space 100 and secured position in which a tooth 35 of the locking element 10 is engaged with a groove 36 in the axle 5. When the tooth 35 of the locking element 10 is engaged in the groove 36 withdrawal of the axle is prevented.

Abstract: A parison 4 of hot thermoplastics material is delivered into a mould 1 comprising two mould halves 2, 3 which are closed towards one another. A stress force is applied to the wall of the parison 4 either by a projection 5 extending from one of the mould halves 3 and/or by blowing air at a low pressure against the parison 4 through a blow pin 10. The parison 4 is then penetrated by the blow pin and high pressure air is blown through the blow pin 10 to inflate the parison 4 against the mould halves 2, 3. The blow pin 10 is withdrawn and a formed article such as a case is released from the mould after a preset time.