Cylinder lock incorporating a slam resistance pad

A device for preventing the axial removal of a cylinder from a cylinder lock without a mated key, the cylinder lock extending along a longitudinal axis and including a sleeve having internal surface defining an inner core, the internal surface of the sleeve including a recessed channel therein, the cylinder lock further including a rotatable cylinder adapted to be longitudinally inserted into the inner core of the sleeve, the cylinder including a key way disposed along the axis for slidably receiving the mated key therein and a cylinder retainer slot extending radially with respect to the axis, the cylinder rotatable with the mated key between the first locked position and a second unlocked position, the device comprising:

• a cylinder retainer slidably mounted within the cylinder retainer slot for radial movement therein, the cylinder retainer includes a radially outer end, and is movable between a first cylinder retaining position wherein the outer end of the cylinder retainer projects from cylinder and into the recessed channel in the internal surface of the sleeve, and a second non-retaining position wherein the outer end of the cylinder retainer is retracted within the cylinder;
• means for biasing the cylinder retainer radially outward toward the cylinder retaining position;
• and
• elastomer means for absorbing impact energy to the cylinder retainer in response to an attempt to axially remove the cylinder from the sleeve of the cylinder lock by an impact force without the mated key in the key slot.

A cylinder lock having a forward and rearward end, comprising:

• a sleeve having an internal surface defining an inner core in the sleeve;
• a cylinder rotatably receivable within the inner core of the sleeve, the cylinder defining an external cylinder surface, a longitudinal axis, and a key slot for slidably receiving a key therein, the cylinder further including a cylinder retainer slot extending radially with respect to the axis, the cylinder retainer slot having an opened outer end which opens to the external cylinder surface;
• a cylinder retainer slidably mounted within the cylinder retainer slot for radial movement therein, the cylinder retainer includes a outer end and is movable between a first cylinder retaining position wherein the outer end of the cylinder retainer projects from the cylinder and a second retracted position wherein the outer end of the cylinder retainer is retracted within the cylinder;
• means for biasing the cylinder retainer radially outward toward the cylinder regaining position;
• a stop surface formed along the internal surface of the sleeve, the stop surface positioned forwardly of the cylinder retainer when the cylinder is received within the sleeve;
• and
• an elastomeric slam resistance impact energy absorbing pad positioned between the stop surface and the cylinder retainer.

A cylinder lock having a forward end and a rearward end, comprising:

• a sleeve having an internal surface defining an inner core in the sleeve,
• a cylinder rotatably receivable within the inner core of the sleeve, the cylinder defining an external cylinder surface, a longitudinal axis, and a key slot for slidably receiving a mated key therein, the cylinder rotatable with the mated key between a first unlocked position and a second locked position,
• a cylinder retainer extending from the cylinder,
• a stop surface formed in the sleeve forwardly of the cylinder retainer;
• and
• a slam resistance impact energy absorbing pad positioned between the cylinder retainer and the stop surface such that the slam resistance pad is compressed between the cylinder retainer and the stop surface in response to an impact force exerted on the cylinder to slide the cylinder forwardly in the sleeve in order to remove the cylinder from the inner core of the sleeve without a mated key in the key slot.