초록 ▼

A latch device is provided with a stationary cylinder to be fixed on a structure on which a door is hinged and a rod adapted to be driven into the cylinder against the resilience of a spring by a strike on the rear side of the door during the closing of the door, and the rod has the front half there

A latch device is provided with a stationary cylinder to be fixed on a structure on which a door is hinged and a rod adapted to be driven into the cylinder against the resilience of a spring by a strike on the rear side of the door during the closing of the door, and the rod has the front half thereof formed in the shape of a pair of retention pieces connected separately through hinges of a small wall thickness into the rear half of the rod, so that while the rod is pushed into the stationary cylinder, the inner wall surface of the stationary cylinder will enable the retention pieces to grasp the strike and, while the door is opened, the rod will protrude from the stationary cylinder and slightly push the door open and, at the same time, the retention pieces will release the strike from retention therein.

대표청구항 ▼

A latch system defined between a stationary support structure and a closure movably mounted upon said support structure between an open, unlatched position, and a closed, latched position, comprising: a cylinder fixedly mounted upon said stationary support structure; a strike fixedly mounted upon sa

A latch system defined between a stationary support structure and a closure movably mounted upon said support structure between an open, unlatched position, and a closed, latched position, comprising: a cylinder fixedly mounted upon said stationary support structure; a strike fixedly mounted upon said closure; a rod, having strike-engaging means disposed thereon, and movably mounted within said cylinder between a first, strike-released outer position, and a second, strike-clamped inner position; first means disposed within said cylinder for biasing said rod toward said first, strike-released outer position; means disposed within said cylinder for releasably retaining said rod, and therefore said strike and said closure, in said second, strike-clamped inner position, and said closed, latched position, respectively; said strike being provided upon the leading end thereof with a radially expanded portion; said strike-engaging means of said rod comprising a central, strike-engaging portion for contact engagement with said leading end of said strike when said closure, and said strike and rod, are moved from said open, unlatched, and first strike-released outer, positions, respectively, toward said closed, latched, and second strike-clamped inner, positions, respectively, against the biasing force of said first biasing means; and a pair of strike-engaging arms projecting outwardly from opposite sides of said said central, strike-engaging portion for envelopingly engaging said radially expanded portion of said strike therebetween, said arms being mounted upon said central, strike-engaging portion of said rod for accommodation within said cylinder when said closure, and said strike and said rod, are moved from said open, unlatched, and first, strike-released outer, positions, respectively, toward said closed, latched, and second strike-clamped inner, positions, respectively; and rotary cam means mounted upon said rod for cooperation with said retaining means of said cylinder when said rod is moved from said first outer position to said second inner position so as to retain said rod at said second inner position such that said strike-engaging means are engaged with said closure strike whereby said closure is disposed in said closed state, and for disengaging said retaining means of said cylinder when an inwardly directed force is applied to said closed closure whereby said rod is able to move from said second inner position to said first outer position under the influence of said first biasing means so as to permit said strike-engaging means to disengage said closure strike such that said closure can assume said open state.