Closure fasteners – Bolts
Patent
1994-02-01
1996-02-20
Meyers, Steven N.
Closure fasteners
Bolts
292 66, B05C 1900
Patent
active
054922089
ABSTRACT:
In a door assembly composed of a door frame, a door having a hinge side and a hinge supporting the door on the frame for pivotal movement of the door between an open position and a closed position, the hinge side of the door facing, and being adjacent to, a portion of the frame when the door is in the closed position, the door is provided with a recess in the hinge side; and the assembly is further provided with at least one projecting element secured to the frame portion to project into the recess when the door is in the closed position and having a mass of thermally intumescent material which is expandable for securing the projecting element to the door upon being heated above a predetermined temperature.
REFERENCES:
patent: 3636659 (1971-01-01), Bylicki
patent: 3659382 (1971-05-01), Dixon
patent: 4045930 (1977-09-01), Dixon
patent: 4092394 (1978-05-01), Dixon
patent: 4122632 (1978-10-01), Dixon
patent: 4144688 (1979-03-01), Dixon
patent: 4246304 (1981-01-01), Dixon
patent: 4354304 (1982-10-01), Dixon
patent: 4931339 (1990-06-01), Malcolm-Brown
patent: 5121950 (1992-06-01), Davidian
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Patent search report dated Sep. 8, 1993.
Patent search report dated Sep. 15, 1993.
Product brochure entitled "Sealmaster.RTM. Intumescent Fire & Smoke Protection", Feb. 1988.
Meyers Steven N.
Millner Monica E.
Pemko Manufacturing Company
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