Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Reexamination Certificate
2006-03-21
2006-03-21
Fox, John (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
C137S887000, C073S861740, C251S208000
Reexamination Certificate
active
07013914
ABSTRACT:
The present invention relates to a throttle valve, particularly for controlling a liquid flow in a central heating or an air conditioning system, with a flow control unit having a first and a second element (18, 30), which are movably mounted relative to each other for setting a desired flow, characterised in that the first element (18) is designed as a first disc, and the second element (30) is designed as a second disc, and that the first and the second disc (18, 30) are mounted tight on each other in such a way that the first disc (18) may be rotated relative to the second disc (30), the first disc (18) exhibiting at least one first flow aperture (36) and the second disc (30) exhibiting at least one second flow aperture (38), the desired flow being adjustable through the degree of overlapping of the at least one first flow aperture (36) and the at least one second flow aperture (38), the at least one first and the at least one second flow aperture (36, 38) being designed such that, by rotating the first disc (18) relative to the second disc (30) a continuous, particularly linear, square or exponential increase in the flow is achievable.
REFERENCES:
patent: 3812882 (1974-05-01), Taylor
patent: 4048855 (1977-09-01), Sejournet
patent: 5308040 (1994-05-01), Torres
patent: 6273132 (2001-08-01), Chrysler et al.
patent: 688 834 (1998-04-01), None
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patent: 298 06 215 (1999-09-01), None
patent: 299 05 655 (1999-09-01), None
patent: 0797 080 (1997-09-01), None
patent: 0 789 821 (2001-01-01), None
Fox John
Reich KG-Regel-und Sicherheitstechnik
Womble Carlyle Sandridge & Rice PLLC
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