A clamp including a first jaw member having a camming surface, a second jaw member pivotable with respect to the first jaw member, a first biasing member biasing the first and second jaw members to a first position; and a locking mechanism that includes a cam or roller for cooperating with the camming surface of the jaw member, and a second biasing member biasing the cam or roller against the camming surface to lock the first and second jaw members in a second position. An optional alignment collar can be used to align components of the filtration apparatus prior to clamping. Filtration apparatus including the clamp, and also optionally including the alignment collar, is also disclosed.

A mechanism system can include a load responsive component, a pivot point coupled to the load responsive component, and a mechanism, coupled to the load responsive component, configured to engage when the load responsive component moves and configured to induce a first ratio of movement and a second ratio of movement.

A hand-operated tool lock mechanism secures a pair of grips in a closed locked state. The mechanism includes: a holding recess at the end of one grip; an engaging recess at the end of the other grip; a ring component removably and rotatably disposed in the holding recess, which engages with the engaging recess placing the grips in the closed state; and a catch for removably and rotatably inserting the ring component in the holding recess. The holding recess and the catch hold the ring component oriented away from the other grip when the ring component is disengaged from the engaging recess. When the hand-operated tool is used, the releasing of the ring component from the locked state causes the ring component to be held between the holding recess and the catch in an orientation in which the ring component does not contact the other grip.

A hand-operated tool lock mechanism secures a pair of grips in a closed locked state. The mechanism includes: a holding recess at the end of one grip; an engaging recess at the end of the other grip; a ring component removably and rotatably disposed in the holding recess, which engages with the engaging recess placing the grips in the closed state; and a catch for removably and rotatably inserting the ring component in the holding recess. The holding recess and the catch hold the ring component oriented away from the other grip when the ring component is disengaged from the engaging recess. When the hand-operated tool is used, the releasing of the ring component from the locked state causes the ring component to be held between the holding recess and the catch in an orientation in which the ring component does not contact the other grip.

Pliers comprising a head portion incorporating gripping faces within the opposing jaws for the clamping of the desired workpiece, pivotal handle portions and a sprung toothed link positioned between the handles. Bow shaped resilient portion or portions are usefully incorporated within either or both the jaw or handle portions, when the pliers are operated these resilient portions impart a useful superior sprung pressure upon the clamped workpiece by the gripping face of the jaws. The Jaws and bend promoting portion are contiguous with each individual handle and gripping portion. The jaws can further be usefully locked in the required clamping position upon the workpiece by a toothed sprung strut pivotally attached to the fixed handle and conveniently being locked or unlocked according to the locking switch pivotal within the opposing moving handle.

Pliers comprising a head portion incorporating gripping faces within the opposing jaws for the clamping of the desired workpiece, pivotal handle portions and a sprung toothed link positioned between the handles. Bow shaped resilient portion or portions are usefully incorporated within either or both the jaw or handle portions, when the pliers are operated these resilient portions impart a useful superior sprung pressure upon the clamped workpiece by the gripping face of the jaws. The Jaws and bend promoting portion are contiguous with each individual handle and gripping portion. The jaws can further be usefully locked in the required clamping position upon the workpiece by a toothed sprung strut pivotally attached to the fixed handle and conveniently being locked or unlocked according to the locking switch pivotal within the opposing moving handle.

A hand operated gripping tool has a first handle (301), a first jaw (201) connected with the first handle, a second handle (302) pivotably connected with the first handle to permit relative pivoting movement of the second handle with respect to the first handle and a second jaw (202) connected with the second handle. One of the first jaw and second jaw is a removable jaw and the removable jaw is push-fit attachable to the respective handle.

A plug for retaining a filter screen in a fluid port of a servovalve, comprises an annular body, the annular body comprising: opposed first and second axial end surfaces, a radially inner surface extending between the first and second axial end surfaces, a radially outer surface extending between the first and second axial end surfaces and at least one recess formed in the radially inner surface for receiving a tool for removing the plug from the port. A tool for removing the plug comprises a pair of handles pivotally mounted to one another about a pivot, each handle having a plug gripping portion extending therefrom beyond the pivot, each plug gripping portion comprising an outwardly projecting tooth for engaging in the recess of the plug when the plug gripping portions are moved apart by operation of the handles.

A plug for retaining a filter screen in a fluid port of a servovalve, comprises an annular body, the annular body comprising: opposed first and second axial end surfaces, a radially inner surface extending between the first and second axial end surfaces, a radially outer surface extending between the first and second axial end surfaces and at least one recess formed in the radially inner surface for receiving a tool for removing the plug from the port. A tool for removing the plug comprises a pair of handles pivotally mounted to one another about a pivot, each handle having a plug gripping portion extending therefrom beyond the pivot, each plug gripping portion comprising an outwardly projecting tooth for engaging in the recess of the plug when the plug gripping portions are moved apart by operation of the handles.

The main fixed handle optionally incorporates two swivel out arms, which can form part of a three-legged base. When operated thus, the jaws and moving handle point generally upwards from the formed base, the moving handle can now be operated by one hand leaving the other free to position the workpiece. The moving handle can incorporate a further locking switch that can be utilised in both a switchable locking position or non-locking position upon a sprung toothed strut between the handles, at least one of which further incorporates a curved resilient portion in order to provide useful sprung closure of the parallel moving jaws upon the workpiece in the locking method. A lanyard can be optimally attached to the swivel out arm ends to provide the user with a chest mounted portable vice.