Other

Retrax, Inc.

Jerry Goldberg

Brian D Zdeb

A retractable syringe includes a barrel, one end of which comprises a mounting collar. A needle carrier is releasably mounted within the collar and releaseably supports a needle cartridge. A hypodermic needle is mounted within the cartridge. A sheath attaches at one end of the cartridge and at the other end of the collar. A plunger is telescoped into the barrel and includes a piston sealingly engaging the barrel. The piston includes a latch for engaging the carrier and releasing it from the collar. The piston and carrier also include an anti-remount mechanism preventing the carrier from being reengaged into the collar. To preform this, a separate tool is used to insert the carrier into the collar. The plunger further includes surfaces to displace fluid as the piston is forced toward the proximal end of the barrel to displace fluid to reduce squirt. A cap is also provided to initially seal off the proximal end of the barrel and after usage to form a seal by engaging teeth within the proximal end of the barrel.

Retractable syringe

A retractable syringe includes a barrel [212], one end of which comprises a mounting collar[214]. A needle carrier [216] is releasably mounted within the collar [214], and releasably supports a needle cartridge [218]. A hypodermic needle [20] is mounted within the cartridge [218]. The collar [214] has inclined threads [650] in its bore wall for engaging lugs [248] on the carrier [216]. A cap [910] is provided with a flange [960] having a lower surface [962] wider than the proximal end of barrel [212] and dogs [952]. The dogs [952] are sized to insert into threads [650], whereby dogs [952] ride threads [650] to seal surface [962] against the proximal end of barrel [212].

A retractable syringe includes a barrel [212], one end of which comprises a mounting collar [214]. A needle carrier [216] is releasably mounted within the collar [214], and releasably supports a needle cartridge [218]. A hypodermic needle [20] is mounted within the cartridge [218]. The collar [214] has inclined threads [650] in its bore wall for engaging lugs [248] on the carrier [216]. A cap [910] is provided with a flange [960] having a lower surface [962] wider than the proximal end of barrel [212] and dogs [952]. The dogs [952] are sized to insert into threads [650], whereby dogs [952] ride threads [650] to seal surface [962] against the proximal end of barrel [ 212].

A method of forming and the construction of a temporary roadway mat system, comprising a number of longitudinally arrays of overlapping on-road truck tire sidewalls, the arrays covering the expected width of the roadway and being supported from beneath by a floor member made up of a number of relatively flatly arranged on-road truck tread portions, in which the sidewalls are connected together and also connected to the tread portions to create a strong unitary floatational instant roadway surface over unstable ground.

Tire mat and method of construction

A mat construction usable in the construction, mining and the like industries wherein tire beads from used tires are tied together into an array with the use of strips of used tire casing. The mat can be used as an underlayment for roadways built over unstable ground surfaces, or a number of the mats can be superimposed one upon the other to form a blasting mat. The mats can be formed by inexpensive laborers at the construction site, for example.

Growing community of inventors

Houston, TX, United States of America

Jerry Goldberg