초록 ▼

A male luer-lock connector (1) for medical fluid lines comprising an elongated tubular body (2) with an end portion with external luer cone (10) and an internally threaded bushing mounted so that it can turn and slide on a portion with a cylindrical external surface (9) of the tubular body (2). The

A male luer-lock connector (1) for medical fluid lines comprising an elongated tubular body (2) with an end portion with external luer cone (10) and an internally threaded bushing mounted so that it can turn and slide on a portion with a cylindrical external surface (9) of the tubular body (2). The axial travel of advance (C) of the bushing (3) has a reduced length, and the portion with a cylindrical external surface (9) of the tubular body (2) has an annular widened portion (13) that can be elastically engaged by friction by the bushing (3) upon screwing of the latter on a female luer-lock connector (L).

대표청구항 ▼

A male luer-lock connector (1) for medical fluid lines comprising an elongated tubular body (2) with an end portion with external luer cone (10) and an internally threaded bushing mounted so that it can turn and slide on a portion with a cylindrical external surface (9) of the tubular body (2). The

A male luer-lock connector (1) for medical fluid lines comprising an elongated tubular body (2) with an end portion with external luer cone (10) and an internally threaded bushing mounted so that it can turn and slide on a portion with a cylindrical external surface (9) of the tubular body (2). The axial travel of advance (C) of the bushing (3) has a reduced length, and the portion with a cylindrical external surface (9) of the tubular body (2) has an annular widened portion (13) that can be elastically engaged by friction by the bushing (3) upon screwing of the latter on a female luer-lock connector (L). els for the first and second layers, respectively. 13. The method of claim 12 wherein (a) comprises transferring energy in a solid piezoelectric material, and (b) comprises transferring energy in a piezo-composite material. 14. The method of claim 12 wherein (a) and (b) comprise transferring acoustic energy in response to at least one transmit waveform; and (c) comprises altering at least one of amplitude and delay of the first signal relative to the second signal. 15. The method of claim 12 wherein (a) and (b) comprise transferring acoustic energy in response to at least one received acoustic signal; and (c) comprises altering at least one of amplitude and delay of the first signal relative to the second signal. 16. The method of claim 12 further comprising: (e) increasing a bandwidth of the transducer element as a function of an impedance variation of a matching layer along one dimension, the matching layer adjacent the second layer. 17. The method of claim 12 further comprising: (e) selectably connecting a first electrode of the bi-layer transducer element to a first path; (f) selectably disconnecting the first electrode from a second path; and (g) selectably connecting or disconnecting a second electrode of the bi-layer transducer element to one of the first and second paths. 18. An ultrasound transducer element of a transducer array for imaging at one or more frequencies, the transducer element comprising: a first layer; and a second layer stacked with the first layer along a range dimension; and a matching layer adjacent the second layer, the matching layer varying in an impedance characteristic along one dimension; and wherein the matching layer matches a lower frequency at an edge portion along the elevation dimension and matches a higher frequency at a center portion, the higher frequency a harmonic of the lower frequency. 19. The element of claim 18 wherein the matching layer varies in thickness along an elevation dimension. 20. The element of claim 18 wherein the first layer comprises a solid piezoelectric material and the second layer comprises a piezo-composite material. 21. The element of claim 18 further comprising: a first electrode adjacent the first layer, a second electrode adjacent the second layer and a third electrode between the first and second layers; and switches connected to the first, second and third electrodes for selectable operation under a dual frequency mode of operation and a single resonance frequency mode of operation. 22. An ultrasound transducer element of a transducer array for imaging at one or more frequencies, the transducer element comprising: a first layer; and a second layer stacked with the first layer along a range dimension; and a matching layer adjacent the second layer, the matching layer varying in an impedance characteristic along one dimension; and wherein the matching layer comprises at least two different materials, a density of the first material greater at edge portions than at a center portion of the matching layer and a density of the second material greater at the center portion than at the edge portions of the matching layer. 23. An ultrasound transducer element of a transducer array for imaging at one or more frequencies, the transducer element comprising: a first layer; and a second layer stacked with the first layer along a range dimension; and a matching layer adjacent the second layer, the matching layer varying in an impedance characteristic along one dimension; and wherein the matching layer is patterned along an elevation dimension, the patterning providing one of apertures, divots and indentions. 24. A method for operating a bi-layer transducer element, the method comprising: (a) transferring energy in a first layer; (b) transferring energy in a second layer; (c) increasing a bandwidth of the transducer element as a function of an impedance variation of a matching layer along one dimension, the matching layer a