A marine hatch assembly includes a rectangular ring shaped frame, a hatch cover hinged to the frame and a pivotal adjustment mechanism or adjuster for maintaining the hatch in a predetermined open position. The adjusting mechanism or adjuster includes a pair of telescoping elements one of which has a flexible joint therein. This flexible joint is prevented from flexing by the other of the telescoping elements until that element is withdrawn to a point beyond the flexible joint i.e., when the hatch cover is rotated beyond a predetermined angle. The adjusting mechanism also includes a clamp for maintaining the telescoping elements in a fixed relationship with respect to one another in order to maintain the hatch in a predetermined open position.

A quick-release-hinge device comprising an elongated, latching, tongue member being releasably mounted to a stationary mounting bolt secured along one edge of a removable cover member, the cover member being formed to close an opening in a structure wherein the opening is defined by a peripheral frame member which includes a jaw member arranged to releasably receive the hinged, latching, tongue member, and a peripherally mounted sealing member disposed to be positioned between the frame member and the cover member in order to sealingly engage the peripheral edge of the cover in a closed mode. The elongated tongue is releasably held in a substantially fixed relationship to the cover member by a hold-down handle when the cover is closed or pivoted about the jaw member. When the cover member is to be removed from the frame structure, the hold-down handle is disengaged from the tongue member, allowing the tongue to float freely and to separate from the cover -- thus permitting the tongue member to have space for disconnecting from the jaw member, and thereby releasing the cover from the frame structure.

A hatch assembly for a boat has a hatch cover and a hatch mounting frame to which the cover is hinged by releasable hinges, there being two espagnolette bolts serving the dual functions of hinging and latching the hatch cover to the mounting frame; retraction of either espagnolette bolt at will from an associated hinge receiver on the mounting frame enabling the hatch cover to be swung open left or right handedly, and retraction of both bolts from their receivers enabling the hatch cover to be lifted clear of the mounting frame.

A bi-directionally openable hatch cover hinge and lock device for hatch covers which close the hatches on top of railroad cars and which are openable from either side of the car, utilizing a minimum number of component parts and including a passive captive device for the hatch cover to prevent loss of the cover if the latches on one side are left open and the hatch is opened from the other side, and also including an integrated one piece yoke top and handle with a pivoted cam lock attached to the handle, the pivoted cam lock being weight biased toward its locked position and being prevented from rotating beyond its weight biased locking condition by a stop pin.

The present invention relates to a ventilator assembly for caravans or buildings. A ventilator panel is provided with internal projections any one of which can be engaged by a wiper arm to hold that part of the panel against opening movement. A slidable shaft raises the remainder of the panel so that the orientation of the opening can be selected.