Abstract: An auto-retractable syringe having a barrel and a plunger wherein engagement of said plunger with an otherwise immobilised needle hub allows a biasing member to push the needle hub into a cavity in the plunger.

Abstract: An auto-retractable syringe having a barrel and a plunger wherein engagement of said plunger with an otherwise immobilised needle hub allows a biasing member to push the needle hub into a cavity in the plunger.

Abstract: An auto-retractable syringe having a barrel and a plunger moveable within said barrel, said barrel having a gland assembly inside a forepart thereof, said gland assembly being connected to a needle hub; wherein said needle hub is located in the forepart of said barrel via a Luer-lock thread, internal of the forepart of the barrel, and two or more lugs protruding from said needle hub, and wherein said Luer-lock thread is open internal of the barrel such that the needle hub can be drawn into the barrel uninhibited by the thread.

Abstract: A ferrule (10) that is intended to be cast into a concrete element, such as a concrete panel. Engaged with the ferrule (10) is a washer assembly (22) that secures a plate (19) to the concrete element (16) for the purposes of securing the concrete element (16) to an adjacent concrete element (17). The washer assembly (22) has a threaded fastener (21) that can be adjusted angularly for engagement with the ferrule (10).

Abstract: A washer assembly for a threaded fastener said assembly including a first washer portion having an aperture through which the threaded fastener is to pass, and a surface surrounding said aperture; and a second washer portion, said second washer portion having an aperture through which the fastener is to pass, the second portion having a surface surrounding the aperture of the second portion and being positioned to abut the surface of the first portion and to be urged into contact therewith upon tensioning of the fastener; and wherein the surface of said second portion extends beyond the aperture of said first portion when the surfaces abut, the aperture of said first portion is dimensioned to provide for relative movement between the portions with the apertures aligned to provide for the insertion of the threaded fastener therethrough, and said surfaces have cooperating projections and recesses that inhibit relative movement between the portions when the threaded fastener is tensioned urging the surface of sa

Abstract: A ferrule (10) that is intended to be cast into a concrete element, such as a concrete panel. Engaged with the ferrule (10) is a washer assembly (22) that secures a plate (19) to the concrete element (16) for the purposes of securing the concrete element (16) to an adjacent concrete element (17). The washer assembly (22) has a threaded fastener (21) that can be adjusted angularly for engagement with the ferrule (10).

Abstract: A retractable syringe (30) comprising a hollow barrel (32) with a radially inwardly facing abutment surface (54) and a needle hub (40) having first engagement formation (42) integrally formed with the needle hub. A radially outer portion (50) of the first engagement formation (42) is engaged with the abutment surface (54) to radially inwardly bias the first engagement formation (42). A plunger includes a second engagement formation (60) which the first engagement formation captively engages at the end of a stroke thereby engaging the plunger (34) with the needle hub (40). The needle tip is retractable into the barrel (34) upon application of a predetermined longitudinal force to the plunger (34).

Abstract: A retractable needle safety syringe (11) with plunger locking mechanism is disclosed. Locking means (36) are provided in the body (12) of the syringe to engage the plunger (13) once it is retracted after use, so that the syringe is rendered incapable of being used further. The locking means is preferably provided by a twist lock feature. A region of weakness (24) is also provided in the plunger so that after the needle is retracted into the body of the syringe, and the plunger engaged with the locking means, the plunger is broken off so it cannot be depressed again.

Abstract: A single use syringe is disclosed having a leading end, a trailing end and a longitudinal axis. The syringe comprises a longitudinally extending hollow barrel, a plunger having a stem, a head and a needle tip. The head being longitudinally displaceable within the barrel. The stem having a first engagement formation and the head having a shoulder defining a second engagement formation. A locking bush is longitudinally fixed within the barrel, the bush having an aperture adapted to receive the stem, permitting the stem to slide longitudinally relative to the bush. The bush has a third engagement formation, and the bush also has an abutment surface defining a fourth engagement formation.

Abstract: An intravenous cannula assembly comprises a longitudinally extending barrel (10, 210), a cannula hub (30, 230), a cannula (50, 250), a cannula guard (70, 270) and a deployment mechanism (90, 100, 290, 300). The cannula hub (30, 230) is mounted in the barrel (10, 210) and has a hub aperture (35, 235) extending between the hub leading end (31, 231) and hub trailing end (32, 232). The cannula hub (30, 230) is adapted to mount a tube at the hub trailing end (32, 232) in fluid communication with the hub aperture (35, 235). The cannula (50, 250) is mounted in, and in fluid communication with, the hub aperture (35, 235). The cannula (50, 250) extends from the hub leading end (31, 231) through the barrel leading end (11, 211). The cannula guard (70, 270) is concentrically mounted about the cannula hub (30, 230).

Abstract: A washer assembly for a threaded fastener said assembly including a first washer portion having an aperture through which the threaded fastener is to pass, and a surface surrounding said aperture; and a second washer portion, said second washer portion having an aperture through which the fastener is to pass, the second portion having a surface surrounding the aperture of the second portion and being positioned to abut the surface of the first portion and to be urged into contact therewith upon tensioning of the fastener; and wherein the surface of said second portion extends beyond the aperture of said first portion when the surfaces abut, the aperture of said first portion is dimensioned to provide for relative movement between the portions with the apertures aligned to provide for the insertion of the threaded fastener therethrough, and said surfaces have cooperating projections and recesses that inhibit relative movement between the portions when the threaded fastener is tensioned urging the surface of sa

Abstract: A safety syringe is disclosed. The safety syringe has a retractable needle facility incorporated therein, the syringe comprising a barrel and plunger and needle assembly. The needle is caused to retract into the barrel of the syringe upon completion of injection once it has been used, by means of engagement between the needle assembly and the end of the plunger. Locking means preferably in the form of a locking bush is provided in the body of the syringe to engage the plunger once it is retracted after use, so that the syringe is rendered incapable of being used further.

Abstract: A single use syringe is disclosed having a leading end, a trailing end and a longitudinal axis. The syringe comprises a longitudinally extending hollow barrel, a plunger having a stem, a head and a needle tip. The head being longitudinally displaceable within the barrel. The stem having a first engagement formation and the head having a shoulder defining a second engagement formation. A locking bush is longitudinally fixed within the barrel, the bush having an aperture adapted to receive the stem, permitting the stem to slide longitudinally relative to the bush. The bush has a third engagement formation, and the bush also has an abutment surface defining a fourth engagement formation.

Abstract: An auto retractable safety syringe (11) is disclosed. The syringe has barrel (12) which has a hollow plunger (13) located therein. The plunger has piston means (39) associated therewith so as to be sealingly slideable within the barrel. The syringe further has a needle cartridge assembly (14) located in the barrel, the needle cartridge assembly comprising a needle (20), needle hub (21), and a housing (15, 16) therefor. The needle cartridge assembly is initially releasably engaged on the end of the plunger in a retracted state within the barrel prior to use, and is movable to and engageable with the end (25) of the barrel where the needle extends therefrom in an in-use position for performing an injection. During this time the plunger is withdrawn from engagement with the cartridge, so as to function in known manner as a plunger for taking fluid into the barrel and causing it to be injected into a patient.

Abstract: A retractable syringe (30) comprising a hollow barrel (32) with a radially inwardly facing abutment surface (54) and a needle hub (40) having first engagement formation (42) integrally formed with the needle hub. A radially outer portion (50) of the first engagement formation (42) is engaged with the abutment surface (54) to radially inwardly bias the first engagement formation (42). A plunger includes a second engagement formation (60) which the first engagement formation captively engages at the end of a stroke thereby engaging the plunger (34) with the needle hub (40). The needle tip is retractable into the barrel (34) upon application of a predetermined longitudinal force to the plunger (34).

Abstract: An auto-retractable safety syringe comprising a syringe barrel (12) having a hollow plunger (13) slideably located therein. The needle assembly comprises a needle and a needle hub (17), with a groove in the end of the barrel (12) to hold the needle hub (17) and a spring disposed over said needle hub (17) and acting between the needle hub (17) and the end of the barrel (12). The needle hub (17) has a groove around its circumference in which a locking means mates so as to retain the needle hub (17) in the end of the syringe barrel (12) during use. The plunger (13) upon completion of an injection and when further depressed activates auto retraction of the needle hub (17) by dislodging said locking means from said groove to release the needle hub (17) hence allowing the needle and spring to retract inside the hollow plunger (13) under the influence of the spring.

Abstract: A single use syringe (20) comprising a hollow barrel (22) having a longitudinal axis X extending in a longitudinal direction and including a first engagement formation (74) formed on an internal wall of said hollow barrel (22). The syringe (20) includes a needle tip (24) in fluid communication with the barrel (22), and a plunger (28) insertable within the barrel (22). The plunger (28) having a stem (29) and a head (34) separably connected to the stem (29). The head (34) including a second engagement formation (46). The plunger (28) being displaceable through a longitudinal stroke in the longitudinal direction, to a captive position at an end of the stroke in which the first engagement formation (74) engages the second engagement formation (46), thereby securing the plunger (28) within the barrel (22).

Abstract: A single use safety retractable syringe (10) having a retractable needle (20) is disclosed. The syringe includes a hollow barrel (11), a plunger (13) which slideably fits in the barrel, and a piston (13) which fits on the forepart of the plunger. The syringe also includes an actuator mechanism (14), which is located in the forepart of the barrel. The actuator mechanism has a stem (18) for supporting a needle hub (15). Means (24) are provided on the end of the plunger to engage the actuator and cause it to retract with the needle upon completion of the injection.

Abstract: A safety syringe comprising a syringe barrel (12), a plunger (13), a needle (14), a needle hub (15) integral with the needle, a needle gland (16) to accommodate the needle-and hub, and a needle cap (19) to protect the needle prior to use. The plunger has engagement means (25, 36) located on its end to engage with the needle hub in order to retract the needle from the gland and into the syringe barrel after the syringe has been used. The plunger is provided with a threaded split bush (28), which has a multi start thread. When the plunger is fully retracted with the needle attached, the plunger has one or more lugs (31) that come into contact with the threaded split bush so that the plunger is thereby locked. Hence the needle is locked in the barrel. The plunger may be snapped off retaining the needle safely within the syringe barrel.

Abstract: A single use safety retractable syringe (10) having a retractable needle (20) is disclosed. The syringe includes a hollow barrel (11), a plunger (13) which slideably fits in the barrel, and a piston (13) which fits on the forepart of the plunger. The syringe also includes an actuator mechanism (14), which is located in the forepart of the barrel. The actuator is able to be fitted through the open end of that forepart of the hollow barrel. The actuator mechanism has a stem (18) for supporting a needle hub (15). Means (24) are provided on the end of the plunger to engage the actuator and cause it to retract with the needle upon completion of the injection.