A Rotary Latches is suitable for heavy duty doors and it rotates about a vertical axis. Rotary draw latch consist of a striker plate and a horizontal spring bolt. A Rotary door latch has one or more rotating members and also called Rotating Catches, Hooks, Bear Claw Latches, and Two-Rotor Latches. These latches are available in variety of design and style. The most common design of latch is with the horizontal spring bolt, which is depressed by the striker plate and then pops into an opening in the striker plate when the door is totally closed.

Materials Used

Rotary latch is usually sturdy of construction and is made of metals. Some of the commonly used materials include:

• Steel
• Iron
• Aluminium

Working Principle of Rotary Door Latch

There is a portion in the rotary latch member that employs a stationary striker plate on the door jamb that makes the latch rotate when the door moves to the closed position. The rotation of the latch causes a notch in the latch to engage either side of a post in the striker plate. This makes the latch member to continue rotating until the door is completely closed by the interaction of the post with the notch. There is a releasable detent member that locks rotary latch for further rotation in either direction when the door reaches the fully closed position.