A mechanical plug device for sealing pipeline access ports having a small threaded inner surface. The mechanical plug device has opposing inner and outer circular plate members. The rigid plate members each have interiorly tapered circumferential shoulders of generally the same predetermined slope.
A mechanical plug device for sealing pipeline access ports having a small threaded inner surface. The mechanical plug device has opposing inner and outer circular plate members. The rigid plate members each have interiorly tapered circumferential shoulders of generally the same predetermined slope. The inner plate member has an inner surface, an outer surface, a central aperture and a central cavity extending inward from the tapered circumferential shoulder. The outer circular plate member has an inner surface, an outer surface, a central aperture and an outwardly extending structure from the tapered circumferential shoulder for movement into the central cavity of the inner plate member. The device further has an elastomeric radially expandable pre-threaded O-ring structure which has an outer circumferential threaded surface configuration. The O-ring structure has a V-shaped bottom cross-section defining inclined surfaces of a predetermined slope. The device has an adjustable lateral force structure active between the inner and outer plate members to adjust and position the O-ring structure on their opposing circumferential shoulders.
대표청구항▼
1. A mechanical plug device for pipeline access ports having a small threaded inner surface, said mechanical plug device comprising: (a) spacially opposing inner and outer rigid circular plate members having opposing interiorly tapered circumferential shoulders of generally the same predetermined
1. A mechanical plug device for pipeline access ports having a small threaded inner surface, said mechanical plug device comprising: (a) spacially opposing inner and outer rigid circular plate members having opposing interiorly tapered circumferential shoulders of generally the same predetermined slope, said inner plate member further having an outer surface and a central cavity extending inward from said tapered circumferential shoulder, and said outer plate member further having an outer surface and an inner surface having an outwardly extending central structure from said tapered circumferential shoulder for movement into said central cavity of said inner plate member, said circumferential shoulder of said outer plate having a radial length longer than the radial circumferential shoulder length of said inner plate, (b) an elastomeric radially expandable O-ring structure having an outer circumferential surface of a prethreaded configuration to substantially match the threaded inner surface of a pipeline access port, said O-ring structure further having an inner circumferential generally V-shaped bottom cross-section defining inclined surfaces, said inclined surfaces having generally the same said predetermined slope as said tapered shoulders of said opposing inner and outer plate members, and (c) adjustable lateral force means operative between said inner and outer plate members, whereby the positive adjustment of said lateral force means causes said opposed plate member circumferential shoulders to slidingly engage said O-ring inclined surface structure to cause said O-ring outer circumferential surface to seal against the threaded inner surface of the access port. 2. The mechanical plug device of claim 1, wherein said adjustable force means is comprised of a threaded bolt and nut structure and wherein said threaded bolt is embedded in said inner plate member. 3. The mechanical plug device of claim 1, wherein said device has means to resist rotational movement between said inner and outer plate members. 4. The mechanical plug device of claim 3, wherein said anti-rotational means is comprised of said sloped shoulder of said inner plate member having at least one radially extending anti-rotational rib structure extending therefrom for contact with said O-ring structure. 5. The mechanical plug device of claim 1, wherein said predetermined slopes of said inner and outer plate members and said V-shaped inclined surfaces of said expandable O-ring member are in a range of 35 to 50 degrees as measured vertically in cross section. 6. The mechanical plug device of claim 1, wherein said predetermined slopes of said inner and outer plate members and said V-shaped inclined surfaces of said expandable O-ring member is approximately 40 degrees as measured vertically in cross section. 7. The mechanical plug device of claim 1, wherein said inner and outer plates have axial apertures aligned therethrough and where said inner plate is slotted about said aperture into said exterior surface and wherein said adjustable force means consists of a threaded bolt and nut structure, and wherein said bolt further has a head portion for non-rotationally engaging said slotted aperture of said inner plate member. 8. The mechanical plug device of 7, wherein a sealing washer member is disposed between said bolt head and said inner plate member and wherein a washer member having a low coefficient of friction is disposed between said nut and said outer plate member, whereby said sealing washer member further provides a fluid tight plug device and whereby said low frictional washer aids the tightening and untightening process of said nut onto the threaded portion of the bolt. 9. The mechanical plug device of claim 1, wherein said outer plate member has a unitary radially extending flange member for abutting the end of the conduit entry port. 10. The mechanical plug device of claim 1, wherein said outer plate member has an axial central cavity in said outer surface and a cooperating removable circular push-in cap structure for insertion in said cavity for covering said adjustable lateral force means and to provide a flush plug exterior. 11. The mechanical plug device of claim 1, wherein said inner and outer plate members are of a unitary, molded plastic construction, and wherein said O-ring member is of a deformable elastomeric materials selected from a group of materials consisting of plasticized polyvinylchloride, natural rubber, synthetic rubber, neoprene and urethane. 12. A mechanical plug for clean-out tees for sealing against the interior threaded surface of the entry port of a pipeline, said device comprising: (a) a narrow, elastomeric racially expandable O-ring structure having an outer circumferential surface for engaging the interior threaded surface of a conduit entry port, and an inner circumferential V-shaped bottom cross-section having inclined surfaces of a predetermined slope ranging from 35 to 50 degrees as measured vertically in cross-section, said outer circumferential O-ring surface further having a prethreaded exterior configuration, (b) spacially opposing circular inner and outer plate members of a unitary, rigid and molded plastic construction, said plate members having axial apertures and interiorly facing tapered shoulders of generally the same said predetermined slope as said O-ring and being constructed and arranged to engage the inclined surfaces of said O-ring, said inner plate member further having an outer surface, an inner surface and having a central cavity extending inward from said tapered circumferential shoulder, and said outer plate member further having an outer surface and an inner surface having an outwardly extending central structure from said tapered circumferential shoulder for movement into said central cavity of said inner plate member, said circumferential shoulder of said outer plate having a radial length longer than the radial circumferential shoulder length of said inner plate, said outer plate member further having a circumferential flange member for abutting the end of the conduit entry port, said outer plate member further having an axial cavity in said outer surface and a cooperating removable push-in cap structure, and (c) adjustable force means operable through said axial apertures of said opposing plate members, whereby subsequent to the placement of the plug device into a pipeline entry port, the positive adjustment of said lateral force means causes said sloped opposing shoulders of said plate members to move towards each other to impart lateral forces to the O-ring inclined surfaces to cause said O-ring to seal said threaded circumferential surface against the threaded interior of the entry port. 13. The mechanical plug device of claim 12, wherein said O-ring member is of a deformable elastomeric materials selected from a group of materials consisting of plasticized polyvinyl chloride, natural rubber, synthetic rubber, neoprene and urethane. 14. The mechanical plug device of claim 12, wherein said inner plate member has an exterior axially aligned indentation for receiving said lateral force means and to provide a flush exterior configuration therefor.
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이 특허에 인용된 특허 (6)
Ast Herbert H. (Pacific Palisades CA), Conduit plug.
Wilson, Buddy A.; Billington, Randy B.; Bingham, Bruce W.; Garrison, Tony R.; Morgan, Mark A., Verifiable closing and locking system of a cylindrical passageway.
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