DE4242938A1 - Dispenser with spring reservoir drive - Google Patents

Abstract

Under uniform conditions an approximately uniform, slow dispensing occurs during the entire dispensing period. The dispenser is reusable. In a compact arrangement, one or more compressed springs are set in motion by a braking device in the form of a cylinder with a flow valve (choke) or similar on a control element.The spring or springs execute an adjustable, slow and uniform expansion motion. The spring exerts a force on the piston (1) of a dispensing container (9) via a piston rod or intermediate element, and the contents of the container are ejected.

Description

1. Dosing device with spring-loaded actuator. 2. State of the art: 2.1. Dosing devices powered by batteries.

Some lubricators work with gas generators in the form of Batteries in liquid or solid form.

disadvantage

Very polluting since it is normally not recyclable. At least the gas generator (battery) is waste.

2.2. Dosing devices with throttling point in the dosing channel

Lubricators on the market with spring accumulators have throttling of the lubricant in the lubricant channel (Dosing channel).

disadvantage

Only suitable to a limited extent for lubricants because the grease disassembled (bleeds) at the throttle point and thus one Forms a plug that closes the lubricant channel. No definable dosing time possible, therefore none predictable maintenance intervals.

3. Properties and advantages of the invention:

The invention has the following properties and advantages:

• - very easy to use
• - definable term
• - regardless of energy sources
• - reusable
• - no environmental pollution as it is easy in its components can be disassembled and recycled.

4. Design variants and possible applications. 4.1. Design variant 1 (see Fig. 1)

One (or more) compression spring in a can is compressed by means of a device or by hand. The piston ( 1 ) of a cylinder ( 3 ) located in the box ( 2 ), which is attached to the spring via a connecting part, is pushed back to the cylinder base ( 4 ). The spring should be designed so that the spring force remains approximately the same in the working area.

The air in the cylinder escapes either through a corresponding vent valve or past the piston, the sealing surfaces of which must then be designed accordingly. The length of the cylinder should be at least the length of the metering section ( 5 ).

The spring, which is now under tension, tries to pull the piston ( 1 ) out of the cylinder again, causing a vacuum.

Via an adjustable flow valve ( 6 ) on the bottom of the cylinder or in the piston, ambient air can now flow in, which increases the volume in the cylinder again and slowly expands the spring. The spring force, the inflowing amount of air and the cross-sectional area of the cylinder are decisive for the speed of the piston. But also frictional resistance and temperature.

After the spring accumulator is tensioned, it is placed on the dosing container. Either as in Fig. 1, both parts can be screwed together, or a fixed connection is made with a bayonet catch or the like. The slowly expanding spring now presses on the piston ( 8 ) of the dosing container ( 9 ) so that the contents are pressed out. The existing resistance is still decisive when determining the runtime. The throttling must be determined by tests in order to then convey this to the user in the form of instructions for use. If the dosing container is empty, the spring mechanism is removed and tensioned again.

The dosing container is either refilled from the front until the piston is back in the starting position, or replaced by a new one.

4.1. Design variant 2

Instead of ambient air, a media dispenser is placed on the back of the Cylinder bottom, which then clean gas (e.g. dried and filtered air), hydraulic fluid or the like. the cylinder of the spring accumulator. When using gas dispensers or liquid dispensers then pushing the medium back out the cylinder into the accumulator (when tensioning the spring accumulator) sensible.

4.2. Other versions

• - The arrangement of the cylinder ( 3 ) in the spring accumulator in such a way that the throttling medium does not have to flow in but must flow out (see FIG. 2).
• - Use of one (or more) tension spring instead of one (or more) compression spring. (See Fig. 3).
• - Independent readjustment of the throttle to the over the To compensate for the spring force (working distance), thus an absolutely constant, linear speed over the entire way to work (with constant back pressure and Temperature) is reached. For example, in that through small bores or the like on the long side of the cylinder additionally z. B. air can penetrate.

Claims (3)

1.Dosing device with spring-loaded drive and free dosing channel, which, under constant conditions, performs an approximately constant, slow dosing throughout the dosing period and is reusable, characterized in that in a compact design, one (or more) tensioned spring by a braking device in the form of a cylinder with a flow valve (throttle) or the like, on an actuating device or the like, is forced to an adjustable, slow and even relaxation movement (referred to completely as a drive unit). The spring, the piston rod or an intermediate piece attached to it now presses on the piston of the dosing container, which then pushes out the contents. 2. dosing device according to claim 1, characterized, that a preset throttle after each tensioning of the spring forcing them to work in the same way. Same Donation amount in the same predetermined time, otherwise same conditions. 3. dosing device according to claim 1 and 2, however, only intended for single use.