Releasable locking assembly for a door control cylinder

A releasable locking assembly for selectively locking and unlocking a door control cylinder, having a spring biased rod member extending from an end thereof, the assembly comprising:

• (a) a movable locking member encircling the cylinder rod member and retained within a first cup member having an open end and a closed end, the open end secured to an end of the control cylinder with the rod member extending axially through the first cup member, the first cup member having a spacer member for maintaining a confined space between the first cup member closed end and the control cylinder end for the movable locking member, the movable locking member biased against an interior closed end of the first cup member opposite the control cylinder;
• (b) a biased, linear actuating member paralleling the rod member and traversing the first cup member end opposite the cylinder, the actuating member free moving and retained within an offset aperture in the first cup member closed end opposite the control cylinder with a biasing spring surrounding the actuation member exterior the first cup member, the actuating member movable to cant the locking member upon the rod member to secured the rod member in an extended condition;
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• (c) a second cup member having an open end and a closed end with an axial rod aperture therein, the second cup member open end moveably secured about said first cup member and operatively connected to said biased, linear actuation member, whereby moving the second cup member toward the first cup member causes the biased actuation member to cant the locking member on the rod member to lock the rod member in an extended condition from the control cylinder, the locking member releasing the rod member upon further extending the rod member from, the control cylinder.

A releasable locking assembly for selectively locking and unlocking a door control cylinder, having a spring biased rod member extending from an end thereof, the assembly comprising:

• (a) a movable locking member encircling the cylinder rod member and retained within a first cup member having an open end and a closed end, the open end secured to an end of the control cylinder with the rod member extending axially through the first cup member, the first cup member having a spacer member therein for maintaining a confined space between the first cup member closed end and the control cylinder end for the movable locking member, the movable locking member biased against an interior closed end of the first cup member opposite the control cylinder by a first rod-encircling spring member;
• (b) a biased, linear actuating member paralleling the rod member and traversing the first confining member end opposite the cylinder, the actuating member free moving and retained within an offset aperture in the first cup member closed end opposite the control cylinder with a biasing spring surrounding the actuation member exterior the first cup member, the actuating member movable to cant the locking member upon the rod member to secured the rod member in an extended condition;
• and
• (c) a second cup member having an open end and a closed end with a axial aperture therein, the second cup member open end moveably secured about said first cup member and operatively connected to said biased, linear actuation member, whereby moving the second cup member toward the first cup member causes the biased actuation member to cant the locking member on the rod member to lock the rod member in an extended condition from the control cylinder, the locking member releasing the rod member upon further extending the rod member from the control cylinder.

A door control cylinder and locking assembly comprising;

• (a) a control cylinder for attachment between a door and a door frame, including a cylindrical member having a spring biased rod member extending from an end thereof;
• (b) a releasable locking assembly for selectively locking and unlocking the rod member extending from the cylinder member, the locking assembly including:
• (i) a movable locking member encircling the cylinder rod member and retained within a first cup member having an open end and a closed end, the open end secured to an end of the control cylinder with the rod member extending axially through the first cup member, the first cup member having a spacer member for maintaining a confined space between the first cup member closed end and the control cylinder end for the movable locking member, the movable locking member biased against an interior closed end of the first cup member opposite the control cylinder;
• (ii) a biased, linear actuating member paralleling the rod member and traversing the first cup member end opposite the cylinder, the actuating member free moving and retained within an offset aperture in the first cup member closed end opposite the control cylinder with a biasing spring surrounding the actuation member exterior the first cup member, the actuating member movable to cant the locking member upon the rod member to secured the rod member in an extended condition;
• and
• (iii) a second cup member having an open end and a closed end with an axial rod aperture therein, the second cup member open end moveably secured about said first cup member and operatively connected to said biased, linear actuation member, whereby moving the second cup member toward the first cup member causes the biased actuation member to cant the locking member on the rod member to lock the rod member in an extended condition from the control cylinder, the locking member releasing the rod member upon further extending the rod member from the control cylinder.