Hose clamp

A clamp which comprises a clamping band having two ends and threaded means for tightening the clamping band about an object to be fastened, said threaded means including a first member retained near one band end, a second member retained near the other band end, said first and second members being each provided with through-bores, and a screw member having a screw head larger than the through-bore of the first member and a threaded portion adapted to extend at least through the through-bore of said first member and operable to tighten the clamp by drawing together the first and second members and thereby reduce the diametric dimension of the clamp, characterized in that one band end extends beyond the area of the threaded means underneath the overlapping other band end to cover the gap underneath the threaded means and thereby prevent bulging of the object to be fastened into the gap, and further means within the area of overlap of said one band end with said other band end to provide a substantially stepless transition in the circumferential direction between said one band end and the adjoining band portion, said first and second members being of at least partially cylindrical shape and being retained by band portions externally bent back upon themselves to form at least partially cylindrically shaped pocket-like loops rotatably receiving said first and second members to permit positional adjustment during tightening thereof, the bent-back band portions being secured to respective underlying band portions, one of said bent-back band portions being formed directly by the other band end of the clamping band, and the other of said bent-back band portions being formed by a separate band part bent back upon self whose outer bent-back band portion is secured to the underlying inner portion of the separate clamping band part while said inner portion, in turn, is secured to the underlying portion of the clamping band.

A clamp which comprises a clamping band having two ends and threaded means for tightening the clamping band about an object to be fastened, said threaded means including a first member retained near one band end, a second member retained near the other band end, said first and second members being each provided with through-bores, and a screw member having a screw head larger than the through-bore of the first member and a threaded portion adapted to extend at least through the through-bore of said first member and operable to tighten the clamp by drawing together the first and second members and thereby reduce the diametric dimension of the clamp, characterized in that one band end extends beyond the area of the threaded means underneath the overlapping band end to cover the gap underneath the threaded means and thereby prevent bulging of the object to be fastened into the gap, said first and second members being at least of approximately part-cylindrical shape retained in pocket-like loops of substantially complementary, at least approximately part-cylindrical shape and formed by band portions externally bent-back upon themselves to permit postional adjustment of said first and second members during tightening of the clamp, spring means between the screw head and the first member for automatically compensating for thermal expansions, and further means within the area of overlap of said band end with the overlapping band portion near the other band end to provide a substantially stepless transition in the circumferential direction between said one band end and the adjoining band portion.