Fluid handling – Control by change of position or inertia of system
Patent
1996-02-28
1998-08-04
Hepperle, Stephen M.
Fluid handling
Control by change of position or inertia of system
137 39, F16K 1736
Patent
active
057879176
ABSTRACT:
An automatic earthquake gas shut-off system (11) is provided in two selected versions. The first version of the gas shut-off system (11) includes a spring pendulum (17), a first electronic movement sensor (21), an electrical control relay system (23), an electrical motor (25), and a housing (27). A several improvements to the first version may be made. These improvements may include one or more of the following. The use of a reset switch (61), a combination of a first bevel gear (37) and a second bevel gear (39), a combination of a second electronic movement sensor (53) and a third electronic movement sensor (55), a timer (65), a key (41), a rechargeable battery (67), and an activation switch (63). The second version of the gas shut-off system (11) includes, in addition to the elements of the first version, a pendulum damper (19) which may adjust the receptive frequency of the spring pendulum (17). Either version, along with any combination of the improvements described herein, may be housed in a single housing (27) or separated into one or more detached parts. If the complete gas shut-off system (11) is housed in a single housing (27), then the complete gas shut-off system (11) is easily mounted directly onto the main gas pipe (15) without any modification to the existing main gas pipe (15).
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Lee Il Y.
Park Bong J.
Hepperle Stephen M.
Park John K.
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