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A handle operated, heavy duty, toggle type draw latch is mountable on one of two members and is operable to selectively engage and disengage a latch-engageable formation connected to the other of the two members. The latch includes a complexly configured operating handle that is pivotally connected

A handle operated, heavy duty, toggle type draw latch is mountable on one of two members and is operable to selectively engage and disengage a latch-engageable formation connected to the other of the two members. The latch includes a complexly configured operating handle that is pivotally connected near one end to a mounting base for movement relative to the base between closed and open positions, that provides a hand grip near its opposite end, and that, at locations between its opposite ends pivotally mounts a drawbar for movement between extended and retracted positions, and defines not only a plurality of stops but also a catch-engageable formation. One stop engages the base when the handle is closed. Another stop engages the base when the handle is fully open. Still another stop engages the drawbar when the drawbar is retracted. When the handle is open, the drawbar can be pivoted into and out of extended positions for selectively embracing the latch-engageable formation. If the handle is pivoted to its closed position while the drawbar is extended to embrace the latch-engageable formation, the drawbar exerts force on the latch-engageable formation that tends to draw the two members relatively toward each other. A base-carried safety catch pivots between latched and unlatched positions for receiving and releasably retaining the catch-engageable formation of the handle when the handle is closed.

대표청구항 ▼

In a toggle type draw latch assembly having a base, having an elongate operating handle that is pivotally connected by means of a first pivot pin to the base near one end region of the handle for permitting movement of the handle relative to the base about a first pivot axis of the first pivot pin b

In a toggle type draw latch assembly having a base, having an elongate operating handle that is pivotally connected by means of a first pivot pin to the base near one end region of the handle for permitting movement of the handle relative to the base about a first pivot axis of the first pivot pin between a fully open position wherein a portion of the handle is extended relative to the base and a fully closed position wherein the handle portion is situated relatively near to the base, having a hand grip formed near the opposite end region thereof, having a drawbar pivotally connected to the handle at a location that is nearer to the one end region of the handle than to the hand grip, with the drawbar being pivotally movable relative to the handle about a second pivot axis between an extended position and a retracted position wherein a portion of the drawbar is situated relatively near to the hand grip, the improvement comprising: a) the base being formed as an assembly of a substantially L-shaped member and a substantially U-shaped member; b) the L-shaped member having a substantially flat mounting leg that is joined by a substantially right angle bend to a substantially flat end leg that has a length measured from the right angle bend that is less than is the length of the mounting leg measured from the right angle bend, with the mounting leg and the end leg each having front and rear portions that are located on opposite sides of a common imaginary center plane that intersects substantially at right angles the mounting leg and the end leg along imaginary center lines that extend substantially centrally with respect to the mounting leg and the end leg, respectively; c) the U-shaped member having a pair of substantially flat, similarly configured, front and rear legs that are rigidly connected by substantially right angle bends to a substantially flat base leg, with the front and rear legs: 1) being oriented to extend in spaced, substantially parallel relationship so as to overlie each other; 2) having end surfaces that overlie each other and that extend substantially perpendicular to the substantially flat base leg; 3) having aligned holes formed therethrough that are of a size that will closely receive the first pivot pin; d) first connecting means for rigidly connecting the U-shaped member to the L-shaped member 1) such that the front and rear legs of the U-shaped member are positioned to extend in substantially parallel planes on opposed front and rear sides of, and at substantially equal distances from said imaginary center plane, 2) such that the base leg of the U-shaped member engages a selected one of the mounting leg and the end leg of the L-shaped member, and 3) such that the overlying end surfaces of the front and rear legs of the U-shaped member engage the other of the mounting leg and the end leg of the L-shaped member; e) the handle being formed as an assembly that includes: 1) a pair of elongate front and rear handle members that extend in overlying relationship from A) overlying first end regions of the front and rear handle members that have aligned holes formed therethrough that are of a size that will closely receive the first pivot pin, and B) overlying second end regions of the front and rear handle members are similarly configured and cooperate to define an elongate handgrip that is always located farther from the first pivot pin than is said portion of the drawbar that is situated relatively near to the hand grip regardless of the orientation of the drawbar relative to the handle; and, 2) stop formation means defined by overlying, similarly configured formations of the front and rear handle members for cooperatively defining a stop that engages a selected one of the mounting leg and the end leg of the L-shaped base member when the handle is in a selected one of its fully open and fully closed positions; and, f) with the handle also defining a drawbar engaging surface 1) that is situated along the length of the handle at a chosen location which is between the first pivot pin and the handgrip, 2) that is configured to be engaged by the drawbar when the drawbar is in its retracted position, and 3) that is configured so as to ensure that, when the drawbar is in engagement with the drawbar engaging surface, the drawbar will be prevented from so closely approaching the handgrip as to come into contact with portions of a hand that is gripping the hand grip.