摘要:
A device for connecting a longitudinal bar to a pedicle screw for fixation of the spine includes a body having an axis, an upper end, a lower end, a hole coaxial with the axis, and a through hole positioned perpendicular to the axis. The device also includes a collet chuck slidably disposed within the hole. The collet chuck includes a through hole substantially aligned with the through hole of the body for receiving the longitudinal bar. The collet chuck also includes a chamber defined by elastic tongues for receiving the head of the pedicle screw.
摘要:
A method includes loading a plurality of thumbnail images into a virtual address space having a first address, and retrieving a specific thumbnail image of the plurality of thumbnail images from the virtual address space by indexing into the virtual address space at a location defined by an offset, the offset corresponding to the specific thumbnail image.
摘要:
The invention relates to a pressure transducer assembly (1; 24) connected to a process circuit of a process plant by at least one fluid line (5; 26, 27; 61). There is a flange connection (7; 33) between connections on the process circuit and the fluid line and a flange connection (9; 35) between a connection block (3; 32) and the fluid line (5; 26, 27; 61). Each flange connection has a flange (8, 11; 34, 37; 53; 62) on the fluid line. According to the invention, at least one of the flanges (8, 11; 34, 37; 53; 62) on the fluid line is made in two parts and consists of a flange connection piece (14; 46, 50; 54) screwed to an end of the fluid line. The flange connection piece provided with an axial passage bore (18; 47; 55) and of a flange element (15; 48, 51; 56, 58; 64) having a sealing face (19). A slipped-over separate flange (22; 49, 52; 57) affixed to a contact surface (10; 36; 59) which reaches over the flange element (15; 48, 51; 56, 58; 64) and connects it to the contact surface (10; 36; 59) so as to press with a sealing face (19) of the flange element against the contact surface (10; 36; 59). A great flexibility is provided by a choice among different flange forms, and at the same time no tolerance problems occur. In particular problems in the alignment of hole patterns are minimized, while great mechanical strength is ensured. All this is achieved by connecting the pressure transducer assembly through flange and threaded connections according to the invention, rather than welding the pieces of the assembly together.
摘要:
The invention relates to a device for connecting a longitudinal rod with a bone anchoring element, such as a pedicle screw, thereby forming a system for fixation of the spine. The device includes a connecting member having upper and lower ends, a bore hole which is open at least towards the lower end and has a central axis, and a through hole positioned perpendicular to the central axis. The device also has a tensioning member insertable in the upper end of the connecting member for securing the bone anchoring element to the connector at a surgeon selected angle. A radially compressible spring chuck is arranged within the connecting member and has a cavity for receiving the head of the bone anchoring element. An insert slides into the bore hole of the connecting member and has a recess with a shape complementary to the outer surface of the spring chuck. The spring chuck is axially supported in the bore hole in such a fashion that radial movement of the spring chuck is not affected.
摘要:
A spinal screw or hook has a slotted head to receive a support rod. A two-piece rod retainer is provided with an outer ring-like collar locked into the interior of the slotted head and a fastener extending through the collar to contact a support rod in the bottom of the slot.
摘要:
The instant invention relates to a protection box to be installed on a measuring instrument assembly in a process plant. The box includes two identical box halves in contact with each other, about contact rims. Opposing recesses are provided at the interfaces of the contact rims to form passage openings when the halves are closed. According to the invention the passage openings are of sufficient sized so that the usual elements of the measuring instrument assembly extending through the protection box walls fit with excess space. The passage openings are tightly sealed by an inserted molded plug made of an elastic foam material. Passages for the parts of the measuring instrument assembly entering or exiting the protection box can be installed at the installation site in such manner that said parts are tightly enclosed under tension by the elastic synthetic material of the molded plug. Universal application of the protection box and proper functioning as well as easy handling are achieved.
摘要:
The invention relates to liquid herbicidal compositions comprising a compound of the formula ##STR1## and an alkyl polyglycoside or an alkyl polyglycoside and at least one surfactant from the series comprising fatty alcohol polyglycol ether sulfate, alkyldimethylamine oxide, alkyldimethylbenzylammonium chloride and coconut alkyldimethylaminoacetic acid or a salt thereof. The invention furthermore relates to a process for the preparation of these compositions and their use for controlling undesired vegetation.
摘要:
An improvement in the Koppers-Totzek coal gasification system comprises the step of adding cool and clean recycle gas to the product gas as it leaves the gasifier unit, thereby eliminating the use of water sprays to quench the product gas.
摘要:
An apparatus and a method for the treating gases, such as natural gas extracted as shale gas, has a heat-insulated protective housing with a stratified liquid reservoir. An outer heat exchanger outside the protective housing has a primary side about which ambient air flows as heating medium and a secondary side for cold stratified reservoir liquid to be heated and fed back to the stratified reservoir. A defined quantity of gas flows through an inner heat exchanger inside the housing and is heated to a defined gas temperature by heated stratified reservoir liquid. The cooled stratified reservoir liquid leaving the inner heat exchanger feeds back to the stratified reservoir. The heated gas leaving the inner heat exchanger flows to a gas analysis apparatus inside or outside the heat-insulated protective housing.
摘要:
A passively cooled instrument protective housing has an internal heat exchanger, an external heat exchanger, and a storage tank for a cooling medium and disposed in a housing interior. A cooling unit having a cooling unit evaporator is disposed in the storage tank and in which a cooling unit coolant is evaporated with the use of heat from the storage tank cooling medium. A condenser or a liquefier is disposed outside the housing and in which the vaporous or gaseous cooling unit coolant emanating from the cooling unit evaporator is liquefied. A switching and/or shut-off device is provided, by which the cooling unit can be switched off and/or can be uncoupled from the passive cooling system formed by the internal and external heat exchangers and by the storage tank. In addition, a control and/or regulating device is provided, which same is operatively connected to the cooling unit.