INDIANAPOLIS --Two Von Duprin employees have been awarded a patent for the invention of a pneumatically controlled exit device. Sales Development Manager S. Carl Dean, AHC, (left in photo) and Application Engineer Ken Salter, AHC, have received U.S. Patent Number 5,372,394.

The pneumatically controlled exit device assembly is used to remotely latch and unlatch a door by controlling the air pressure directed to the device from a pneumatic pressure source. It includes a push-bar-operated exit device for manually retracting the latch on an emergency door, as well as an air cylinder assembly biased to control the pneumatic latch retraction in response to changes in air pressure.

Pneumatic exit devices are used for installations that require remote unlocking capability but are located in hazardous locations where electrically operated devices could not be used. They are marketed by Von Duprin in rim, mortise, concealed vertical rod and surface vertical rod touchbar devices.

Additional information on the pneumatic exit device is available from Von Duprin, Inc., P.O. Box 6023, Indianapolis, IN 46206.

NOTE TO EDITOR:
Von Duprin, Inc., part of worldwide Ingersoll Rand, is the leading manufacturer of door exit devices. The firm is also a major supplier of electrical security products and systems, including restricted access control systems, card reader and keypad access systems, electromagnetic locks, electric strikes and related hardware used in schools, hotels, municipal buildings, stores and other commercial or public building construction.