A method of controlling flow through a flexible tube includes providing a pinch clamp mechanism including a pinching element and a pinching surface configured to apply a force on the flexible tube when the flexible tube is positioned between the pinching element and the pinching surface. The method also includes displacing the pinching element relative to the pinching surface with a mechanical drive unit and biasing the pinching element toward the pinching surface with a spring.

A housing having a housing body (100) carries on the outside of one of the side walls (110) a bolt (500) aligned parallel to the lid guide grooves (120) and the lid (200) carries a sleeve (222) fixed to a tab (220) projecting over the upper edge of the corresponding side wall (110) of the housing body (100) and aligned coaxially with the bolt (500). The sleeve (222) engages around the bolt (500) to form an axially and rotationally movable sliding bearing.

A system is described herein that can irrigate a tissue site using negative-pressure. The system may include a tissue interface configured to be placed adjacent to the tissue site, and a sealing member configured to be placed over the tissue interface to form a sealed space. The system may also include a negative-pressure source configured to be fluidly coupled to the sealed space and a fluid source. The system may further include an irrigation valve. The irrigation valve can have a fluid inlet configured to be fluidly coupled to the fluid source. The irrigation valve can also have a fluid outlet configured to be fluidly coupled to the sealed space. The irrigation valve may also include a clamp configured to be actuated by the negative-pressure source to regulate fluid flow from the fluid source through the fluid outlet.

A pinch valve has an upper casing support the entire pinch assembly and the lower casing. In a particular embodiment, a quarter-turn actuator is deployed and the sleeve may be removed without moving the actuator. The body may be open or closed to retain an external air pressure used to help close the sleeve and reduce actuator forces.

A pinch valve includes a valve block. A valve insert defines a tube chamber and is disposed within an open interior of the valve block. A valve gate includes a body. The valve gate body is movably engaged with the valve insert. The valve gate is at least partially disposed within the open interior of the valve block. A lever is pivotably connected to the valve insert. The lever includes a tube projection that is pivotably movable within the tube chamber.

A multi-tubing pinch valve assembly including a receiving space defined between a pinch protrusion and tubing contact body. The multi-tubing pinch valve assembly is moveable between a retracted state and an extended state. In the extended state, multiple tubes disposed in the receiving space are pinched, restricting flow therethrough. In the retracted state, multiple tubes are capable of being loaded into and/or out of the receiving space.

The pinching device has an upper jaw assembly that pivots on a lower jaw assembly to clamp a flexible tubing between two clamping surfaces to restrict flow in the tubing. The upper jaw assembly is removable and may be replaced to accommodate different sized tubing. A lock down screw of a pivotal locking nut assembly is positioned in a compression seat of the upper jaw assembly at closure to avoid movement once set.

Pinch clamps are provided which generate positive displacement while also preventing rebound. To prevent rebound while providing positive displacement, the upper and lower clamping surfaces may be configured to form a pinch profile along which the tubing is compressed with the pinch point being formed at the distal end of the pinch profile. To further prevent rebound, the lower arm of the pinch clamp can include blocking ribs that interface with the upper clamping surface to prevent distal travelling of the pinch point even if the upper arm is forced into an over-engaged position.

A mechanical pipe squeezer includes: an elongated primary arm having a side surface extending between a first end and an opposing second end; a secondary arm having a side surface extending between a first end and an opposing second end, the first end of the secondary arm being pivotably coupled to the primary arm at a location between the first end and the second end of the primary arm; a threaded passage disposed at the first end of the primary arm; and a threaded shaft having a first end and an opposing second end and being threadedly received within the threaded passage, the second end of the threaded shaft being rotatably coupled to the secondary arm so that rotation of the threaded shaft causes the second end of the secondary arm to either pivot outward away from the primary arm or toward the primary arm, depending on the direction of rotation.

A mechanical pipe squeezer includes: an elongated primary arm having a side surface extending between a first end and an opposing second end; a secondary arm having a side surface extending between a first end and an opposing second end, the first end of the secondary arm being pivotably coupled to the primary arm at a location between the first end and the second end of the primary arm; a threaded passage disposed at the first end of the primary arm; and a threaded shaft having a first end and an opposing second end and being threadedly received within the threaded passage, the second end of the threaded shaft being rotatably coupled to the secondary arm so that rotation of the threaded shaft causes the second end of the secondary arm to either pivot outward away from the primary arm or toward the primary arm, depending on the direction of rotation.