Door anti-slamming device

1. A door anti-slamming device,

wherein the device includes a chamber with an entrance located at a first end;

wherein the chamber houses a plunger component with a tip configured to slidably move in and out of the entrance, therefore defining a compacted configuration and an extended configuration of the device, respectively;

wherein the device includes a biasing means configured to bias the device towards the extended configuration;

wherein the device includes a first cavity and a second cavity located within the chamber, and a fluid provided within the first and second cavities, and

wherein a partition is located between the first and second cavities;

characterised in that

the partition includes an orifice configured to control a transfer rate of the fluid between the first cavity and second cavity, wherein the device is configured to transition to the compacted configuration at a rate at least partially controlled by transfer of the fluid from the first cavity into the second cavity, and

the partition remains in a fixed position with respect to the chamber when the device moves between the extended and compacted configurations, wherein the first cavity in the device is in direct contact with the plunger, and wherein the plunger is in direct contact with the first cavity, but is not in direct contact with the second cavity; and

wherein the device comprises a cylindrical outer body, and wherein the partition is integrally formed with the outer body.

2. The device as claimed in claim 1 , wherein the device is configured to be installed in a door frame.

3. The device as claimed in claim 1 , wherein the device includes a separate impact plate intended to be positioned on an opposing surface.

4. The device as claimed in claim 1 , wherein the entrance includes a stop.

5. The device as claimed in claim 1 , wherein once a force is removed from the tip, the biasing means is configured to draw the fluid back from the second cavity into the first cavity through the orifice to return the device to the extended configuration.

6. The device as claimed in claim 1 , wherein

a) the second cavity is formed by internal walls of the chamber, the partition which includes the orifice, and a movable wall; and

b) the movable wall is biased towards the partition through engagement with the biasing means, but the movable wall will retract from the partition to expand the second cavity upon pressure build up as a result of fluid passing through the orifice.

7. The device as claimed in claim 1 , wherein:

the partition is a fixed wall integrally built into the chamber, with the partition including the orifice.

8. The device as claimed in claim 1 , wherein the biasing means is a spring-loaded coil.

9. The device as claimed in claim 1 , wherein the second cavity is configured to expand and contract.

10. The device as claimed in claim 9 , wherein a fully expanded volume of the second cavity is substantial equal to a fully expanded volume of the first cavity.

11. The device as claimed in claim 1 , wherein the device includes a plurality of seals such O-rings to allow the fluid to be effectively retained between the first and second cavities.

12. The device as claimed in claim 1 , wherein the orifice is configured as a channel.

13. The device as claimed in claim 12 , wherein the channel is between 0.01 mm and 10 mm in diameter.

14. The device as claimed in claim 1 , wherein the orifice includes a nozzle.

15. The device as claimed in claim 1 , wherein the orifice includes an adjustable diameter.

16. The device as claimed in claim 1 , wherein only one orifice is present on the partition.

17. A use of a door anti-slamming device as claimed in claim 1 to stop or slow a door from slamming against a surface.