Abstract: An extension device for a face shield features a shell of at least partially dome-like form that delimits a hollow interior space for accommodating a cranial region of a user's head. At a lower marginal area of a frontal region of the shell that is worn over the user's forehead, and at an internal surface of the shell, one or more coupling elements are arranged for selective coupling to an outer side of the face shield to secure said shell onto the face shield in a manner fully supported thereby. An internal airflow channel in a scalp-covering part of the shell communicates with a chimney-like airflow space between two forehead depressions at the frontal region to exhaust warm air from the facial region. The scalp-covering part is angled at more than 90-degrees to the lower marginal area of the frontal region, so as to reside at a rearwardly inclined slope relative to the user's head when worn for greater ventilating effect.

Abstract: A protective shield features a single-piece transparent dome or shell having a rear opening through which facial and cranial regions of a user's head are received, thereby providing improved coverage over conventional face shields that cover the face only. Inward protrusions at a transitional region between the facial and cranial portions of the shield rest against the forehead to offset the facial portion of the shield forwardly of the user's face to allow airflow, optionally introduced from an external fan via an airflow channel integrally formed in the cranial portion. A flexible connector clip has a J-shaped profile for engaging an out-turned flange around the boundary of the shield s rear opening, to enable clipped connection of a bib or shroud. Support protrusions in an underside of the cranial portion maintain airspace above the head, which is further optimized by a rearwardly sloped incline of the cranial portion.

Abstract: A pipe coupling includes mating hub sections engaged by outer split clamp elements that are compressed together against mating tapered surfaces of the hub sections to draw the hub sections together into tight fitting relationship. The clamp elements are driven into a compressed condition by an outer locking ring that fits over the split clamp elements to draw the hub sections together and to retain the hub sections against axial separation. The clamp elements have locking surfaces engageable by the locking ring and axial movement of the locking ring is limited by appropriate stop surfaces and retainers. A locking sleeve installation and removal tool utilizing an actuator system is described.

Abstract: A pipe coupling includes mating hub sections engaged by outer split clamp elements that are compressed together against mating tapered surfaces of the hub sections to draw the hub sections together into tight fitting relationship. The clamp elements are driven into a compressed condition by an outer locking ring that fits over the split clamp elements to draw the hub sections together and to retain the hub sections against axial separation. The clamp elements have locking surfaces engageable by the locking ring and axial movement of the locking ring is limited by appropriate stop surfaces and retainers. A locking sleeve installation and removal tool utilizing an actuator system is described.