摘要:
A pushpin device comprises a head adapted to allow a user to apply pressure to the head without discomfort, longitudinally extending fastening member coupled to the head, a base comprising an aperture configured to allow the fastening member to pass through the base, and an outer member coupled to the head and the base. In a first position, the head is spaced from the base, and the outer member encloses a longitudinal segment of the fastening member. In a second position, the outer member is deformed to place the head proximate to the base and to extend the fastening member through the aperture. The outer member exerts a countering force on the base and the head, one of which comprises magnetically susceptible material while the other comprises magnetic material. A magnetic force between the head and the base maintains the outer member in the second position.
摘要:
A steel fastener has an elongate shank, an enlarged head formed at one end of the shank, and a generally pointed tip formed at the other end of the shank. A grooved portion of the shank is formed with helical grooves defining helical ribs and with annular grooves defining annular rings. The shank has a cylindrical portion between the grooved portion and the tip and a cylindrical portion between the grooved portion and the head. Each of the annular grooves has a root where deepest and each of the annular rings has a crest where largest. The roots define an imaginary cone diverging toward the tip. The crests define an imaginary cone converging toward the tip. The shank has an exterior surface coated with a polymeric coating, which is formed from an aqueous composition containing a water-based acrylic resin and a water-based polyurethane resin. A zinc layer and a chromate conversion layer are provided between the polymeric coating and the exterior surface of the shank.
摘要:
A V-nail fastener has a leading edge that is partially formed with asymmetric sharpening, limited substantially to the central sections. Flange elements extend generally perpendicularly to the panel elements of which the central (V-shaped) portion is constructed and cooperate therewith to give the fastener a W-shaped overall profile. The lateral sections of the leading edge, which extend along the flange elements, are substantially devoid of sharpening, or are otherwise so formed as to permit the directional influence of the asymmetric sharpening to occur substantially undiminished.
摘要:
A lock-in grip arm shank nail provides holding power. The nail has a shank between a head for driving the and a point to penetrate the surface. The shank includes at least one set of apertures parallel to the head and capable of receiving a u-shaped wire. The u-shaped wire has its base in the aperture and arms extending on either side of the shank toward the head of the nail. The arms have a rounded tip and may include a wave shape.
摘要:
A corneal rivet for passing internally through the cornea and for providing closure of an incision in the cornea with a mechanically and optically configured rivet body including a first rivet head secured at one end thereto and a second member for securing to the other end of the rivet. The securing can either be through frictional engagement of the second member to the rivet body, through a knotting, a crimping, staking, threading, pinning, heat forming a ball or mushroom member, or a ratcheting engagement. The corneal rivet body can be utilized to suture other tissues besides the cornea, such as sclera, iris, other ocular tissues, skin, flesh, or the like.
摘要:
Disclosed is an anchor assembly especially for use in a plastic wall-panel which comprises a plug formed of a forward section comprising a tapering plastic board-piercing part and an integral ram head, and of a hollow cylindrical section pivotably connected to the forward section. The assembly may further comprise a spike capable of being driven into the hollow cylindrical section, the spike being provided with a cylindrical portion having serrations on its outer surface for bitting into the cylindrical section or ram head and thus being secured to this section or head. The spike is provided with a hammer portion having a length sufficient at least to engage the ram head, as it is driven into the plug, and to cause pivotal of the forward section of the plug and abutment thereof against the concealed side of the plaster-wall panel.
摘要:
A rail spike for holding a tie plate on a tie, embodied in accordance with the invention so that tie cutting is prevented, spike removal for track maintenance is facilitated, and a free rail load wave is allowed. This preferably is attained by providing the spike with left and right side tapered shoulders and a tapered rear surface, such that a unique wedging and swaging action occurs in the tie plate hole during a final driving of the spike, limiting the depth of penetration of the spike into the tie and securely maintaining the gauge of the tie plate on the tie.
摘要:
A fastener for use particularly to temporarily secure wood strip members to a concrete substrate includes an upper cylindrical head overlying a first cylindrical shank, with a truncated conical further head coaxially aligned with the cylindrical head, with a second shank positioned between the further head and an elliptical, deformable anchor portion including a third shank underlying the anchor portion. The anchor portion is deformable to enhance securement of the fastener within the concrete substrate, and wherein further the cylindrical head and the further head define a gap therebetween to enable removal of the fastener by application of a tool to the first shank.
摘要:
A corneal rivet for passing internally through the cornea and for providing closure of an incision in the cornea with a mechanically and optically configured rivet body including a first rivet head secured at one end thereto and a second member for securing to the other end of the rivet. The securing can either be through frictional engagement of the second member to the rivet body, through a knotting, a crimping, staking, threading, pinning, heat forming a ball or mushroom member, or a ratcheting engagement. The corneal rivet body can be utilized to suture other tissues besides the cornea, such as sclera, iris, other ocular tissues, skin, flesh or the like.
摘要:
A stack of fasteners cooperatively define a lateral groove which cooperates with an elongate rib to orient the stack in a magazine of a driving machine.