Patent GB-866747-A (GB)
Title: Improvements in or relating to dispensing devices
IPC: B65D83/14
Filed: 1958-01-31
Abstract: 866,747. Delivering measured quantities of liquids. WALDHERR, W. Jan. 31, 1958 [July 4, 1957(2); Dec. 9, 1957], No. 3345/58. Addition to 848,997. Class 106(5) [Also in Group XXVIII] A device for dispensing measured quantities of pressurized fluid as described in the parent Specification, has the valve housing formed with a larger diameter upper portion 43 and a smaller diameter lower portion 44 and, in the depressed dispensing position of the tubular valve member 9, a skirt 48 on the valve member extends into the lower portion of the valve housing to seal off from the container 1 the annular measuring chamber 49 formed between the skirt and the upper part of the valve housing. In the rest position as shown in Fig. 1, the measuring chamber 49 fills from the container through a lateral port 50 in the skirt and, on depression of the valve, the contents of the chamber are delivered through a port 57, which is then below the sealing ring 46, and through an annular passage 56 and removable jet 58 in the spray head 53. In a modification, the skirt may have a second port at a higher level, to allow the first measured quantity to be supplemented for a period as the valve moves down and to allow a second quantity to issue as the valve returns to initial position; instead of these ports, a port may be provided near the top of the skirt and remain open in the depressed position of the valve so that a continuous spray is provided. As an alternative to the lateral port 50, the lower end of the skirt may be sharply bevelled to provide communication between the container and measuring chamber in the rest position of the valve. In the modification shown in Fig. 4, where the valve is in the position occupied when the container is being filled, the valve member has a transverse dividing wall 77 and, in the dispensing position, a sealing ring 80 bears on the shoulder 64 of the housing to seal off the measuring chamber 75 from the container. As shown in Fig. 10, the valve member has a rod 9<SP>1</SP> within a tubular portion 98 and if, as shown on the right-hand side of the Figure, the sealing ring 80 is fitted and a port 100 provided, measured quantities are delivered but if, as shown on the left-hand side, the ring is omitted and a port 100<SP>1</SP> provided, a constant spray is produced. For limiting the stroke of the valve, the skirt 61 of the spray head may engage the upper surface of the container or part of the spray head may contact the cap 3 or the valve skirt 48 may contact the bottom of the valve housing 44. The skirt 61 may extend down sufficiently to enclose the container and a mark may be provided to indicate the position of the fine nozzle in the spray head. Varying quantity delivered. The size of the measuring chamber may be varied by fitting valves with skirts of reduced diameter over part or all of their length, or detachable valve skirts of different sizes may be used. Filling container. The bore 11 of the valve member 9 may extend to or outside the top of the spray head so that a filling head can be fitted or, before the spray head is fitted, a filling head 86, Fig. 4, can be fitted over the valve member and the member depressed to its fullest extent. The liquid to be sprayed and a propellent gas or a liquid-gas mixture are then supplied through the filling head and the pressure is sufficient to depress a valve 52, Fig. 1, or 79, Fig. 4, against the force of a spring 10 and allow communication with the interior of the container. As shown in Fig. 4, the filling fluid may pass through the port 78 to the port 76 or additionally or alternatively through a slot 102 formed between the sealing ring 46 and a reduced part 101 of the valve member. The filling head may have a sealing ring 87 engaging the container cap 3 or a simple O-ring engaging the outer surface of the valve member.