Brightwell Dispensers Limited

Timothy David Penfold

Peristaltic pump

A dispensing device has a cylinder, and a piston disposed in the cylinder and moveable in priming and dispensing directions, including a first spring device biasing the piston to move in the priming direction. An operating plunger is moveable between an engaged position where it is operatively connected to the piston and movement of the operating plunger is transmitted to the piston, and a disengaged position where it is operatively disconnected from the piston, in which the operating plunger is movable between an outer and an inner point. A second spring device biases the operating plunger to move from the inner to the outer point independently of the piston. The piston has an indicator member. The operating plunger having an end wall with an aperture. When the operating plunger is at the outer point and the piston is at the cylinder's top, the indicator member is disposed in the aperture.

Dispensing device with indicator member

A dispensing device is disclosed having a cylinder, a piston disposed in the cylinder and moveable in priming and dispensing directions, including a spring device biasing the piston to move in the priming direction at a predetermined rate, and an operating plunger connectable to the piston and moveable along a path to move the piston in the dispensing direction. The operating plunger has an engagement device and is moveable between an engaged position in which the engagement device is connected to the piston and movement of the plunger along the path is transmitted to the piston, and a disengaged position in which the engagement device is disconnected from the piston and movement of the plunger along the path is independent of the piston. The engagement device is arranged such that movement of the plunger between the engaged and disengaged positions is of a different kind to movement along the path.

Growing community of inventors

New Haven, United Kingdom

Timothy David Penfold