Baths – closets – sinks – and spittoons – Flush closet – Tank only
Reexamination Certificate
2000-04-18
2001-05-29
Phillips, Charles E. (Department: 3751)
Baths, closets, sinks, and spittoons
Flush closet
Tank only
Reexamination Certificate
active
06237165
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a control device for a flush tank, and more particularly to an electromagnetic control device for controlling and actuating the flush tank.
2. Description of the Prior Art
Typical flush tanks comprise a lever coupled to a flush valve by a link. The lever should be actuated by a force that is large enough to overcome the water pressure applied onto the flush valve. U.S. Pat. No. 793,063 to Ghegan and U.S. Pat. No. 3,462,768 to Lefebvre et al. disclose two typical electromagnetic actuating devices for flush tanks and comprise an armature slidably received in a coil and directly coupled to the flush valve with a link, such as a rod or a chain. No cushioning device or biasing device is provided between the armature and the link to the flush valve.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional flush tank control devices.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an electromagnetic control device for a flush tank which includes a resilient or spring biasing device coupled between the armature and the link to the flush valve for effectively and economically operating the flush tank.
In accordance with one aspect of the invention, there is provided a control device for controlling a flush valve of a flush tank, the control device comprising a housing, a lever including a middle portion pivotally coupled to the housing and including a first end coupled to the flush valve of the flush tank and including a second end extended inward of the housing, a casing secured in the housing, an armature slidably received in the casing and including a first end, a spring member coupling the first end of the armature to the second end of the lever, and electromagnetic means for actuating the armature inward of the casing to rotate the lever about the middle portion of the lever via the spring member. The second end of the lever is moved downward by the flush tank when water flows out of the flush tank.
The electromagnetic means generates an electromagnetic field when the electromagnetic means is energized, the control device further includes means for maintaining the electromagnetic field generated by the electromagnetic means, such that the electromagnetic means is only required to be actuated or energized for a short period of time, such as 0.5 second. The casing includes a pipe provided therein for slidably receiving the armature, the electromagnetic field maintaining means includes a plurality of plates engaged on the pipe for maintaining the electromagnetic field generated by the electromagnetic means.
One or more magnets are disposed on the plates for maintaining the electromagnetic field generated by the electromagnetic means. The electromagnetic means includes a coil disposed on the armature for actuating the armature inward of the casing, and includes another coil disposed on the armature for actuating the armature outward of the casing. The armature may also be pulled outward of the casing via the spring member when the lever is rotated downward by the flush valve after the water flows out of the flush tank.
A seat is secured to the casing and has a recess for receiving a second end of the armature. A securing device is further provided for securing the housing to the flush tank.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 793063 (1905-06-01), Ghegan
patent: 2061310 (1936-11-01), Kleiser
patent: 3462768 (1969-08-01), Lefebvre et al.
patent: 3559217 (1971-02-01), Johnson
patent: 5003643 (1991-04-01), Chung
patent: 0197630 (1990-08-01), None
Chen Kuan Pao
Tsai Yi Tsung
Baxley Charles E.
E. Flush Tech Co., Ltd.
Phillips Charles E.
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