Abstract: To perform fastening work quickly while performing positive fastening, in a fastening clamp for a joint portion of oblong hoses, a strip-like leaf spring material is rolled into an oblong shape, a cutaway is provided in a circumferential direction on one end side, the other end side is formed into a thin shape so as to insert into the cutaway, one end side and the other end side are caused to intersect with each other to be curved inwardly from an inner circumferential surface, respectively, and end portions thereof are bent outwardly in a radial direction to project from an outer circumference thereof.

Abstract: A hose clamp device is made up of a metal strip member which is open at its both ends and formed in a ring shape with its both ends overlapping each other to define inner and outer end portions, the hose clamp device being fixed in place by a lock hole formed in the outer end portion and a lock peg formed on the inner end portion. An elongate notch extending in the lengthwise direction of the strip member is provided at the endmost section of the inner end portion of the strip member. A step is provided at a lengthwise intermediate position on the outer end portion of the strip member, the step receiving the endmost section of the inner end portion, corresponding in thickness to the strip member, and being provided on the inner surface thereof with an elongate rib extending along the lengthwise direction of the strip member.

Abstract: A hose clamp assembly comprises a belt form of a plate spring body which is in an annular form having opposite ends and is provided with a grooved notch in which an extending piece to be described just below is inserted in a free state to form the same circumferential plane; an extending piece which is integrally provided at one end of the plate spring body along its circumferential direction, bent at its extreme end outwardly along the diametrical direction of the plate spring body to form a stopper and includes a pair of projecting tongues extending outwardly and vertically with respect to its both widthwise sides, the tongues inclining at their extreme ends at the required angles with respect to the stopper; and a receiving piece provided at the extreme end of the other end of the plate spring body, the receiving piece being bent outwardly along the diametrical direction thereof and including a notch somewhat wider in width than the extending piece and a horizontal portion provided with locking grooves spa