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A metallic clamping band of channel-shaped cross-section is arranged in a ring-shaped manner and has a discontinuity so as to define two adjacent free ends thereof. A curved channel-shaped insert has one of its ends welded to one end of said clamping band while the other of its ends is free to slida

A metallic clamping band of channel-shaped cross-section is arranged in a ring-shaped manner and has a discontinuity so as to define two adjacent free ends thereof. A curved channel-shaped insert has one of its ends welded to one end of said clamping band while the other of its ends is free to slidably engage the remaining end of the clamping band. The remaining end of the clamping band is provided with a plurality of openings arranged at spaced intervals along each of the sidewalls of the channel shaped member to define a plurality of pairs of openings. A locking pin is insertable into one of said pairs of openings to engage the free end of the insert portion and thereby maintain the clamping band in the expanded and locked position. The free end of the insert preferably has an extending tongue adapted to be positioned between the locking pin and the base of the clamping band when in the locked position. A pair of solid members are welded respectively to the insert and the clamping band to receive an expander for expanding the clamping band to the desired diameter. The holes may be replaced by slots having offset portions for receiving and seating the locking pin. The locking openings in the sidewalls may be replaced by a set screw which lockingly engages the insert to hold the clamping band in the locked position.

대표청구항 ▼

An internal clamping apparatus including a clamping band inserted within the interior of a hollow, resilient, annular gasket for clamping said resilient gasket against an opening in a sidewall to form a fluid-tight seal between said gasket and said opening in said sidewall, said clamping band compri

An internal clamping apparatus including a clamping band inserted within the interior of a hollow, resilient, annular gasket for clamping said resilient gasket against an opening in a sidewall to form a fluid-tight seal between said gasket and said opening in said sidewall, said clamping band comprising; a substantially annular-shaped metallic member having a discontinuity so as to define first and second ends thereof; said metallic member having a substantially channel-shaped cross section defined by a base portion and integral upright sides; an extension having a curved configuration and a cross-section generally conforming to the channel-shaped cross-section of said clamping band; one of the ends of said extension engaging one end of said clamping band and being secured thereto; the opposite end of said extension slidably engaging the remaining end of said clamping band; and locking means for locking said clamping band to said extension to maintain the clamping band in a desired expanded position to urge said gasket radially outwardly and against said opening.