A slam-capable rotary latch employs a single rotary jaw that is releasably retained in its latched position by a rotary pawl, with the latch having a pair of spaced housing side plates that sandwich the rotary jaw and the rotary pawl, with the side plates defining aligned first and second U-shaped notches that cooperate with a third U-shaped notch formed in the rotary jaw for concurrently receiving and latchingly retaining within the confines of the first, second and third U-shaped notches a suitably configured strike formation, with housing side plate portions that define a selected one of the first and second U-shaped notches being rigidified and strengthened by the close proximity presence of a flange 1) that is formed integrally with side plate portions that define the selected notch and 2) that extends transversely to bridge between the housing side plates at a location near the first and second U-shaped notches. The rotary latch is particularly well suited to be bracket-mounted together with an operating linkage to form a modular assembly that can be installed behind the front wall of the closure of an industrial cabinet by utilizing the same threaded fasteners that are used to hold a flush-mountable paddle handle and housing assembly in place in a mounting opening that is formed through the front wall of the closure. The latch may be "locked" by positioning a movable locking member to extend into a path of movement of the operating linkage to selectively permit and prevent movement of the linkage along the path of movement.

Handle operable rotary latch and lock

A versatile operating mechanism for a two-point latch or lock includes a "front" module having a flush-mountable handle and housing assembly that can be connected by simple fasteners to a "rear" module having a mounting bracket that movably supports linkage including an operating arm A pair of latch assemblies are connected to and operated by the mounting-bracket-mounted linkage. In preferred practice, rotary latch assemblies are used that each employs a single rotary jaw that is releasably retained in its latched position by a rotary pawl, with the latch having a pair of spaced housing side plates that sandwich the rotary jaw and the rotary pawl, with the side plates defining aligned first and second U-shaped notches that cooperate with a third U-shaped notch formed in the rotary jaw for concurrently receiving and latchingly retaining within the confines of the first, second and third U-shaped notches a suitably configured strike formation, with housing side plate portions that define a selected one of the first and second U-shaped notches being rigidified and strengthened by the close proximity presence of a flange 1) that is formed integrally with side plate portions that define the selected notch and 2) that extends transversely to bridge between the housing side plates at a location near the first and second U-shaped notches. The operating mechanism may be "locked" by positioning a movable locking member to extend into a path of movement of the operating arm to selectively permit and prevent movement of the operating arm along a path of movement.

Handle operable two-point latch and lock

A latch having a housing, a bolt sliding in the housing along a first axis, a handle pivoting in the housing along a second axis parallel to the first axis between a handle latched position and a handle unlatching position, a drive mechanism for driving the bolt by the handle between a bolt latched position and a bolt unlatching position, a first spring for urging the handle to the handle latched position and a second spring for urging the bolt to the bolt latched position, a cam plate sliding in the housing along a third axis perpendicular to the first and second axes, a first drive carried by the handle for translating the cam plate along the third axis, and a drive link mounted in the housing for pivoting about a fourth axis perpendicular to the first, second and third axes, the drive link including a drive pin for engagement by the cam plate in driving relation and for engaging the bolt along the cam surface of the bolt in driving relation.

Self-closing latch

A slam-capable rotary latch employs a single rotary jaw that is releasably retained in its latched position by a rotary pawl, with the latch having a pair of spaced housing side plates that sandwich the rotary jaw and the rotary pawl, with the side plates defining aligned first and second U-shaped notches that cooperate with a third U-shaped notch formed in the rotary jaw for concurrently receiving and latchingly retaining within the confines of the first, second and third U-shaped notches a suitably configured strike formation, with housing side plate portions that define a selected one of the first and second U-shaped notches being rigidified and strengthened by the close proximity presence of a flange 1) that is formed integrally with side plate portions that define the selected notch and 2) that extends transversely to bridge between the housing side plates at a location near the first and second U-shaped notches. Improvements include housing side plate formations that aid in positioning, guiding and accommodating movement of relatively movable components, and improved connections formed between non-movable components.

Rotary latch and lock

A lockable, slammable paddle operated latch assembly for use as a latching and locking mechanism on a door or panel of an enclosure or compartment has a paddle handle pivotally mounted on a pin transversely mounted through side walls of a recessed draw of a mounting pan and attached at one end to an orthogonal trip/lock member on the interior of the pan adjacent the draw. One extension of the trip/lock member is positioned underneath the locking arm of a key cylinder when the paddle is fully recessed and the key is in the locked position. Another extension of the trip/lock member contacts the latch which is pivotally mounted on the interior of the pan draw. A torsion spring about the latch mounting shank biases the latch into the latched position, but allows the latch to be deflected for engagement with a striker with the trip/lock member locked or unlocked, so that the latch can be slammed shut even when locked. A latch guide can also be mounted on the latch mounting shank.

Lockable slammable paddle latch

A flush door latch assembly having a housing with a recess defined therein and a paddle within the recess. Pulling on the paddle causes a cam having a helical cam face to cooperate with a cam follower to cause rotation of a pivot plate that retracts the plunger bolt and permits a door, hatch or the like having the present door latch assembly to be opened. The plunger bolt travels towards the same side of the latch assembly that the paddle travels towards when the plunger bolt is being retracted.

Marvin L. Larsen

Papers

Flush door latch assembly