Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Reexamination Certificate
2011-05-03
2011-05-03
Hepperle, Stephen M (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
C324S207250, C324S207120
Reexamination Certificate
active
07934518
ABSTRACT:
Disclosed is a device for sensing the opening degree of a valve, which can easily determine the upper and lower limits without using upper and lower limit switches so that, besides simplifying the mechanical structure, the device can be easily installed, maintained, and repaired. The device can avoid basic errors and improve the opening degree sensing performance without using upper and lower limit switches, cams, and a spline so that, by simplifying the mechanical structure, the device can be manufactured, installed, maintained, and repaired at a low cost, and its long-term durability is improved. The device has a main gear adapted to disengage from the meter gear when the main gear is rotated excessively so that any damage to the meter gear and potentiometer, which may occur during installation or use, is prevented.
REFERENCES:
patent: 3743853 (1973-07-01), Dittman et al.
patent: 5079509 (1992-01-01), Marsh
patent: 6079441 (2000-06-01), Miller et al.
patent: 6343615 (2002-02-01), Miller et al.
patent: 7556753 (2009-07-01), Uchiyama et al.
Bok Mun-Su
Jin Ki-Jong
Lee Jae-chul
Lim Jung-hwan
Rho Byoung-Hoo
Chaudry Atif H
Hepperle Stephen M
LRK Patent Law Firm
RPM Tech Co., Ltd.
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