Burroughs Wellcome Co.

Ian E Doubleday

Ronald H Lee, Deceased

A paste dose dispenser is provided which incorporates a housing (1) through which passes a drive rod (3) connected to a plunger (4). A lever (14) is pivotally mounted on a pin (15) for movement towards a handle (2), such action causing a plate (9) to tilt and thus grip the rod (3) and drive the rod in a forward direction against the bias of a spring (11). The degree of movement of the lever (14) is determined by the position of the sliding dose adjuster (19) carrying steps (21) which will be engaged by a boss (20) carried by the lever (14). Ball and detent locating means (24) are provided to hold the dose adjusting plate (19) in each of the alternative positions. Fine adjustment of the degree of movement of the lever (14) can be effected by screwing the boss (20) into the handle (14) and securing it by a lock nut (29).

Relating to dose determining means of paste dispenser

This invention relates to the liquid dispensing of toxic and noxious liquids in such a way that accidental contact with the operator is minimized. This dispenser comprises a sealed cylinder, a piston snuggly fitting inside the cylinder, a pivoted handle, which is limited in its movement by an adjustable screw and a buffer, moves the piston relative to the cylinder, an inlet for feeding liquid into the cylinder, a nozzle at one end of the cylinder for dispensing the liquid from the cylinder, and a drainage outlet at the handle end of the cylinder. Various parts of the dispenser are connected by screw fittings so as to aid in the dispenser's assembly and disassembly.

Growing community of inventors

Sheffield, United Kingdom

Ian E Doubleday