Valves and valve actuation – Tube compressors – Perpendicularly reciprocating tube contacting element
Patent
1981-01-15
1982-04-27
Spiegel, H. Jay
Valves and valve actuation
Tube compressors
Perpendicularly reciprocating tube contacting element
251 8, F16L 5514
Patent
active
043266959
ABSTRACT:
A positive opening device for pinch type valves having an elastomeric body consisting of a generally cylindrical sleeve portion forming a material flow passage, with flange portions at the ends for attachment into material flow lines. Under low pressure conditions of operation, or where the sleeve portion has taken a set, being deformed or in partially closed position, it is desireable to improve the function of restoring the sleeve to a full open condition, whether of a full round type or of a pre-pinched type. The sleeve consists of an elastomeric inner layer surrounded by multiple plies of fabric reinforcement, embedded in elastomeric material in the valve body finalized form, and the fabric reinforcement extends through the sleeve and into the flanged ends. End reinforcements extending partially through the sleeve and up into the flanges are added to the body structure. Means to restore the open condition, consisting of opening flaps, are added as an integral part of the reinforcement, being formed by extension of the fabric of the end reinforcement. Subsequent reinforcement plies secure the opening assist flaps in the fabric structure of the sleeve. Individual centrally directed and opposed flaps thus formed have enhanced support and strength, being part of reinforcement which completely encircles the sleeve and extends into the flanges. Lifting effort is extended over a substantial length of the sleeve with a decreased lifting stress on the reinforcements.
REFERENCES:
patent: 1931320 (1933-10-01), Haushalter
patent: 3268201 (1966-08-01), Little
patent: 3811649 (1974-05-01), Press et al.
Chovanes Eugene
Jackson Edward Lovett
Spiegel H. Jay
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