Valves and valve actuation – Tube compressors – Fluid pressure actuated
Patent
1981-07-02
1985-10-22
Schwadron, Martin P.
Valves and valve actuation
Tube compressors
Fluid pressure actuated
13762565, 251 7, F16L 5514
Patent
active
045483825
ABSTRACT:
A high performance pinch tube valve for accurate, reliable, high speed and precise control of relatively low viscosity fluids. The valve is particularly adapted for use in apparatus for controlled pattern dyeing of textile material, such as carpet, with liquid dye streams. The valve includes a valve block having a bore receiving a flexible tube, and a passageway communicating with and disposed generally transversely to the bore, the intersection of the bore and the passageway defining a pinch chamber. A tube pinch off member is selectively reciprocal within the passageway into the bore for forcing the flexible tube closed. The tube pinch off member comprises a piston rod and a freely-floating ball disposed between the end of the rod and the flexible tube. The pinch chamber has a flattened wall portion formed in the bore opposite the communicating passageway. Additionally, the communicating passageway has a larger diameter than the bore. There is further provided an electrically operated pneumatic valve for selectively supplying a gas under pressure to actuate the piston for pinching closed the flexible tube. The piston and the electrically operated pneumatic valve may be separate or included within a single valve body.
REFERENCES:
patent: 2660395 (1953-11-01), Mair et al.
patent: 2674435 (1954-04-01), Angell
patent: 3793785 (1974-02-01), Austin
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patent: 4071039 (1978-01-01), Goof
patent: 4099700 (1978-07-01), Young
IBM Tech. Disclosure Bulletin, vol. 10, No. 4, Sep. 1961, Bromberg and Davenhall, "Dispensing Viscous Curable Liquids in Measured Amounts", pp. 399-400.
Novack Sheri
Otting Machine Company, Inc.
Schwadron Martin P.
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