Movable or removable closures – Frame with closure feature – Adjustable frame
Patent
1998-01-09
1999-11-30
Redman, Jerry
Movable or removable closures
Frame with closure feature
Adjustable frame
E06B 300
Patent
active
059921005
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an improved door jamb assembly.
BACKGROUND ART
Door jamb assemblies of many different types and styles are currently available. In the case of hinged doors, the door jamb assembly is formed about or mounted into a door opening during construction of a building and remains fixed in position to support a door and also provide a hinge mount for a door. In addition, one of the door jambs normally supports a striker plate or equivalent device for one or more door locks. Door stops are provided around the jambs against which the door abuts or lies adjacent when the door is closed. With the awareness of increasing security in the home, sophisticated and more secure locking systems have been introduced to lock doors, particularly outside or entry doors, in a secure manner. Often such locks incorporate a number of locking bolts. Similar secure locking systems are provided where security screens are used adjacent a door jamb. Another common security lock which is available comprises a chain which is fixed to a door jamb on the inner side of the door opening and which is releasably attachable to the door to limit opening of the door from the outside when the normal door lock is released.
Whilst such locking systems provide the required level of security to prevent or deter entry into a building from the outside, they usually do not allow rapid opening of the door from the inside. This can cause difficulties and problems where, for example rapid escape from a building is required. Such a situation may arise where a fire occurs within a building. It is not unknown for persons to be trapped in a building because they are unable to rapidly escape through the external door or doors due to the complexity and security of the locking system.
The present invention aims to overcome or alleviate the above disadvantages by providing a door jamb assembly for use with an entry door, screen door or any other door which enables a person to rapidly unlock or render ineffective the normal door locking devices from the side of the door opening opposite the normally locked side. The present invention also aims to provide a system which is relatively simple and which may be incorporated into an existing door jamb assembly or which may be supplied in a new door jamb assembly. Other objects and advantages of the invention will become apparent from the following description.
SUMMARY OF THE INVENTION
The present invention thus provides in a preferred form a door jamb assembly for a door having a door lock, said door jamb assembly having at least upright one door jamb member, means for supporting said door jamb member for movement between a first attitude for engagement by said door lock for locking of said door in a closed attitude, and means for selectively moving said jamb member to a second attitude away from said first attitude and free of said door lock to permit opening of said door.
The door jamb may carry a striker plate or equivalent device for engagement by the bolt of the door lock for locking of the door,
In one arrangement the door jamb member may be supported for movement laterally in parallelism towards and away from the side edge of the door carrying the door lock and associated bolt. For this purpose, the door jamb member may be supported by parallel links which are pivotally mounted to the door jamb and a fixed frame member and which may be pivoted to move the jamb member away from the edge of the door.
The means for selectively moving the jamb member suitably are in the form of actuating means which are accessible from the inside of the door opening. The actuating means may be coupled to the links and may be operated from one side of the door opening, normally the inner side to effect or allow movement of the jamb member and permit opening of the door. The actuating means may be in the form of a pivotal lever arm.
Alternatively, the door jamb member may be supported for sliding movement towards and away from the adjacent side edge of the door, for example on guide pins. Bias
REFERENCES:
patent: 1718813 (1929-06-01), Finley
patent: 1750921 (1930-03-01), Bright
patent: 1919393 (1933-07-01), Reinhardt
patent: 2443548 (1948-06-01), Wilson
patent: 2481721 (1949-09-01), Carper
patent: 2661084 (1953-12-01), Steffan
patent: 2699578 (1955-01-01), Marks
patent: 2859491 (1958-11-01), Morris, Jr.
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