Patent ID: 7841047

Claim:
A door closer including: a door closer body formed with at least one channel for flow of a pressure medium controlling operation of the door closer and also formed with at least one bore that intersects the channel and has first and second segments at opposite respective sides of the channel, and a control device fitted in the bore and having first and second opposite ends, the control device comprising a guiding part at its first end, the guiding part being located in the first segment of the bore and having a thread fillet engaging the door closer body and supporting the control device relative to the door closer body, a support part at the second end of the control device, the support part being located in the second segment of the bore, a collar of resilient material located in the second segment of the bore and surrounding the support part of the control device, the collar being under compression whereby the collar supports the second end of the control device relative to the door closer body and restrains the control device against rocking and swaying movement relative to the door closer body due to flow of pressure medium in said channel, and a control part between the guiding part and the support part and having a beveled inner end for cooperating with the door closer body to restrict pressure medium flow in said channel, whereby the control device can be moved in its axial direction by turning the control device supported on the door closer body for adjusting the restriction of the pressure medium flow by the control part, wherein the collar has at least one chase to reduce its thickness at a certain part of the collar, and wherein the control part, the guiding part and the support part of the control device are metal and the collar is plastic, and the control part, the guiding part and the support part are axially movable relative to the collar.