Abstract: An electronic door lock dogging mechanism is provided with a bolt arranged to move into and out of a door to selectively engage a portion of a door frame to lock a door when extending out of the door and when recessed within the door, unlocking the door from the door frame. A first mechanical element is arranged to normally bias the bolt outwardly relative to the door. A first electrical element is arranged, when energized, to move the bolt into a recessed position in the door to unlock the door. A second mechanical element is arranged to be biased into a dogging position relative to the bolt when the first electrical element has moved the bolt into its recessed position. A third mechanical element is arranged to engage the second mechanical element to move it out of the dogging position when the third mechanical element is moved into a first position. A fourth mechanical element is arranged to bias the third mechanical element into the first position.

Abstract: A resilient member, useful in a back checking arrangement, is provided as a body of resilient material having a surface engageable by an outside member such as a portion of a sliding mechanism in a door closer. The body is compressible when engaged by the outside member with a sufficient force. The body has at least one reservoir chamber therein, for receiving a liquid, such as hydraulic fluid, with a communication passage leading from the chamber to the surface to provide fluid communication between the chamber and an exterior of the body. Additional communication passages from the chamber to the exterior of the body may be provided as well. When the body is engaged by the member, the body, chamber and passage are compressed, thus causing the liquid in the chamber to exit the body through the compressing passage. This increasingly restricts the flow of liquid through the passage and increases the force of operation.