Abstract: A toggle clamp having first and second clamping members pivotally connected together for receiving objects to be clamped therebetween; a handle pivotally mounted with respect to one of the clamping members; a bail including a force generating member where the bail is so mounted with respect to the handle that upon movement of the handle from a first position to a second position, the force generating member is moved to a first position to generate a force for clamping the objects together with a first clamping force; and, a member, upon weakening or failure of the force generating means, which permits movement of the force generating member to a second position where the objects remain clamped together with a force less than that of the first clamping force whereby a fail-safe operation is provided.

Abstract: A gate valve is disclosed having a casing with inlet and outlet apertures one of which has a valve seat. An actuator reciprocal transversely of the apertures is provided having two oppositely disposed faces. At least one plate member which serves as a valve head flanks at least one of the faces for cooperation with said valve seat. Cylindrical rotative means having a rectangular cross-section are positioned between the actuator member and the plate member for moving the plate member from an open to a closed/latched position as the actuator member is moved.

Abstract: A gate valve is disclosed having a casing with inlet and outlet apertures one of which has a valve seat. An actuator reciprocal transversely of the apertures is provided having two oppositely disposed faces. At least one plate member which serves as a valve head flanks at least one of the faces for cooperation with said valve seat. And rectangular-shaped rotative means are positioned between the actuator member and the plate member for moving the plate member from an open to a closed/latched position as the actuator member is moved.