Abstract: The invention concerns a fastener comprising a foot and a head comprising a plate to which said foot is linked, a wedge and a shank connecting said plate to said wedge, which comprises a back-plate, a rim and flexible arms connecting said rim to said back-plate, each arm comprises a first and a second curved section, and an elbow connecting them, said first section is connected to said back-plate by a first end of said arm and said second section is connected to said rim by a second end of said arm, said back-plate and each flexible arm are configured such that the distance between the center of said back-plate and said second section increases along said second section from said elbow to said rim.

Abstract: The invention concerns a fastener comprising a foot and a head comprising a plate to which said foot is linked, a wedge and a shank connecting said plate to said wedge, which comprises a back-plate, a rim and flexible arms connecting said rim to said back-plate, each arm comprises a first and a second curved section, and an elbow connecting them, said first section is connected to said back-plate by a first end of said arm and said second section is connected to said rim by a second end of said arm, said back-plate and each flexible arm are configured such that the distance between the center of said back-plate and said second section increases along said second section from said elbow to said rim.

Abstract: A fastener for fixing a mat to a carpet includes a female element having a cap and a female eyelet to sandwich a mat therebetween. A base element is engageable with the female element and includes a carpet holding arrangement for holding a carpet. The base element includes an enlarged head provided with an annular groove. The female eyelet includes at least two studs projecting inward, and deformable arms each of which extends between two adjacent studs transversely to a direction of pushing the head of the base element into the female eyelet. Each arm has a central portion disposed in the annular groove when the female element is engaged with the base element.

Abstract: A fastener for fixing a mat to a carpet includes a female element having a cap and a female eyelet to sandwich a mat therebetween. A base element is engageable with the female element and includes a carpet holding arrangement for holding a carpet. The base element includes an enlarged head provided with an annular groove. The female eyelet includes at least two studs projecting inward, and deformable arms each of which extends between two adjacent studs transversely to a direction of pushing the head of the base element into the female eyelet. Each arm has a central portion disposed in the annular groove when the female element is engaged with the base element.

Abstract: A locking device for a cover and the like which is locked by a first push and unlocked by a second push includes a case (1) which has at a work face (8), an elastic leg (7) provided with a follower (14); and a sliding member (2) which has, parallel to the work face (8), a planar cam surface (24) from which projects a central island (27) about which is formed a cam track for the follower (14). On the first push, the follower (14) passes from its free position (R) to its captive position (V) by a first path on the cam track and, on the second push, the follower (14) passes from its captive position (V) to its free position (R) by a second path distinct from the first path.

Abstract: A locking device for a cover and the like which is locked by a first push and unlocked by a second push, comprising:

Abstract: An article has a tubular barrel (4) formed with a cavity and a catch (6) extending within a cavity window (5). A threaded rod (22) is adapted to be received in the cavity. In the absence of stress, the catch (6), in a rest position, has a wedge (12A) projecting inside the barrel (4). This wedge has a first inclined face (14) which faces the inlet opening (13) in the barrel and is inclined theretowards and towards the outside, and having a second face (15) which is opposed to the first and inclined in the opposite direction from the inlet opening (13) towards the outside. The catch (6) is adapted to tilt resiliently towards the outside when a force normal to the first inclined face (14) is applied thereto and to tilt resiliently inwards when a force normal to the second inclined face (15) is applied thereto. The article is used, when made of plastics material, with a threaded metal rod.

Abstract: A fixing device having a stem (3) adapted to be retained in a wall, this stem having a shaft (9) carrying flexible non-return blades (13A, 13B, 13C, 13D), and having at least three longitudinal wings (10A, 10B, 10C, 10D) oriented in respective planes which intersect at the central longitudinal axis of the shaft, with the surface defining the free end of two of such wings being adjacent to the contour provided for the hole when the latter and the shaft are disposed concentrically.