Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Pneumatic
Patent
1993-10-27
1994-11-22
Rowan, Kurt
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Pneumatic
16 72, E05F 300
Patent
active
053656369
ABSTRACT:
A sliding door closer for automatically returning a sliding door to a closed position includes a gas spring having a cylinder and a rod slidingly received thereby. Pressurized gas within the cylinder urges the rod to an extended position. A block and tackle pulley system is secured to the opposing ends of the gas spring for rotatably supporting a cable extending between the sliding door and the door jamb. The gas spring rod is compressed as the door is opened. Extension of the gas spring rod causes the door to close when released. A piston secured to the gas spring rod has an orifice therein for causing the rod to extend at a controlled rate. The cylinder includes a quantity of oil to cushion the final extension of the rod to further slow the final closing of the door. The gas spring and pulley system fit compactly within the frame of the door or within a tubular housing secured to a side of the door.
REFERENCES:
patent: 141896 (1873-08-01), Shaw
patent: D273457 (1984-04-01), Matsuo et al.
patent: D296758 (1988-07-01), Ogawa et al.
patent: 828063 (1906-08-01), Sinz
patent: 3389422 (1968-06-01), Glenn
patent: 4301623 (1981-11-01), Demukai
patent: 4642845 (1987-02-01), Marshik
patent: 4854554 (1989-08-01), Ludwig
patent: 4884369 (1989-12-01), Tatham
patent: 5131188 (1992-07-01), Hutchison et al.
Gas Spring Company Division of Fichtel & Sachs Industries, Inc. advertising brochure.
Glidestar Industries advertising brochure.
Mah Chuck Y.
Rowan Kurt
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