Patent ID: 11866977
Assignee: MOSHUN, LLC
Field: Machine tools (Mechanical engineering)
Classification: CPC B  E  F | IPC B  E  F

Claim 0:
1. A device for controlling the closing of a door, comprising:
a head unit that is configured to be installed in a doorjamb or door edge, the head unit comprising:
a chamber filled at least in part with a shear thickening fluid;
a piston head connected to a cap, the piston head connected to a rebound shim that rotates relative to the piston head and is configured to exert pressure against the dilatant shear thickening fluid in response to movement of the cap from a force applied to the cap, wherein rotation of the rebound shim to a first position substantially aligns one or more slots of the rebound shim with one or more slots of the piston head, and rotation of the rebound shim to a second position substantially misaligns the one or more slots of the rebound shims with the one or more slots of the piston head;
a plunger bushing inserted into the head unit, the plunger bushing having a cavity fluidly isolated from the chamber, the plunger bushing serving as a guide for the cap which is configured to move into the cavity in response to the force;
a plunger between the cap and the piston head, the plunger bushing serving as a guide for the plunger that is configured to move the piston head into the chamber in response to the door striking the cap;
a rebound guide plug connecting the rebound shim to the plunger, wherein the rebound shim is configured to rotate from the first position allowing the piston head to move into the chamber and rotate to the second position to lock the piston head from moving into the chamber, and
wherein the piston head receives the plunger, a first portion of the guide plug is received in the rebound shim and in the piston head, and a second portion of the guide plug is received in the plunger.