Closure fasteners – Bolts – Swinging
Patent
1997-09-15
2000-08-22
Dayoan, B.
Closure fasteners
Bolts
Swinging
292195, E05C 304
Patent
active
061060321
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The current invention relates to a lock for doors or operationally similar structures, in which the mechanism is manually actuated with the aid of pneumatic means.
The application of pneumatic methods in locking mechanisms is known chiefly for the turning or sliding of the door itself, such as presented for instance in U.S. Pat. No. 4,901,474. Solutions for the actuation of the moving parts of a lock only, using the application of compressed air, have also been suggested. Common to all these solutions is that the locking mechanisms require the importation of external energy.
In U.S. Pat. No. 4,021,066 a pneumatic door bolting system for lorries or railway wagons is proposed; in these vehicles compressed air is as a rule immediately available for braking. The lock proposed in U.S. Pat. No. 4,169,616 requires an air pressure line to the lock from an external source, with which an expensive transmission part from the fixed door frame to the moving door is provided. This applies similarly for the locking system proposed in U.S. Pat. No. 4,691,948. The solutions quoted are based on the supply of external energy, because the manually achievable short-term pneumatic energy is small and is not sufficient to overcome the substantial friction forces, which arise in the opening of conventional door locks.
SUMMARY OF THE INVENTION
The objective, which is addressed by the current invention, is to find a lock for doors and operationally similar structures, such as, for example, windows or sliding doors, whose mechanism is actuated with the aid of pneumatic means, without the requirement for external supply of energy.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross section of a first embodiment of the pneumatic door lock according to the invention.
FIG. 2 is a cross section of a second embodiment of the pneumatic door lock according to the invention.
FIG. 3 is a schematic diagram of the pneumatic connections in further forms of construction of the pneumatic door lock.
DETAILED DESCRIPTION
In FIG. 1 is given the schematic cross section through a first embodiment of the pneumatic door lock. In a non-moving door frame, from which only that part of the door frame 1 is shown, which lies adjacent to the lock, a door 2 is mounted, which is pivoted so as to swivel about a (not shown) vertical axis. Means for the generation of pressure are incorporated in the door 2. These means, comprise a door handle 3, which is firmly fixed to the door 2, in which a hollow body 4 is incorporated, which can be manually compressed, so that its internal volume is decreased. The hollow body 4 here comprises a balloon made of rubber or plastic material. In the sense of the invention it can, however, comprise parts which are sealed one to the other fitting into each other in a telescopic manner. The hollow body 4 is joined in an airtight manner via a primary connecting tube 5 to an actuator 30, which converts the pressure into a mechanical movement. This is, as are the other parts of the locking mechanism, built in to the inner part of the door 2, for instance in a (not shown) housing, such as is known from conventional locks. In this form of construction the actuator 30 comprises a pressure cylinder 6, a piston 7 which can be moved in it and a piston rod 8 which is fixed to it and guided essentially along a straight line. In a further embodiment, not shown, the actuator 30 comprises a bellows of metal or an elastomer. A longitudinal locking bolt 12 is joined at one end firmly to the piston rod 8 and arranged similarly to be movable along the same straight line. Its other end advantageously includes means by which frictional forces can be minimized. These means comprise here for example a suitable spring-supported first roller race 14; other friction reducing means are however also possible, for instance the use of special low friction and low wear materials, or the application of sufficient lubricating grease materials between parts which slide on each other.
A rotating bolt 15 is positioned about a turning
REFERENCES:
patent: 1038624 (1912-01-01), Messick
patent: 1085058 (1914-01-01), Messick
patent: 3950018 (1976-04-01), Pickering
patent: 3999790 (1976-12-01), Rogen
patent: 4021066 (1977-05-01), McShane
patent: 4169616 (1979-10-01), Peterson
patent: 4266415 (1981-05-01), Clarke
patent: 4324425 (1982-04-01), Logan
patent: 4691948 (1987-09-01), Austin, Jr. et al.
patent: 4901474 (1990-02-01), Bayard et al.
patent: 5056838 (1991-10-01), Tiesler et al.
patent: 5121950 (1992-06-01), Davidian
patent: 5288037 (1994-02-01), Derrien
patent: 5328219 (1994-07-01), Konchan
patent: 5342204 (1994-08-01), Och
patent: 5380053 (1995-01-01), Saino
patent: 5397238 (1995-03-01), Och
patent: 5762385 (1998-06-01), Mader et al.
Dayoan B.
Estremsky Gary
Festo KG
LandOfFree
Pneumatic door lock does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pneumatic door lock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic door lock will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-572209