Patents Assigned to Smith Industries
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Patent number: 5835000Abstract: A current transformer assembly has three pairs of contacts projecting from the upper and lower surface of a mounting plate. Below the plate, the contacts in each pair are interconnected by a conductor embraced by a toroidal current transformer. The transformers are electrically connected to a connector accessible on the upper surface of the plate. Four mounting bolts project from the upper surface of the plate so that the assembly can be connected to cooperating contacts on an equipment panel. The lower surface of the plate is enclosed by a housing.Type: GrantFiled: May 27, 1997Date of Patent: November 10, 1998Assignee: Smiths Industries plcInventors: David Ascroft, David Ian Colguhoun
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Patent number: 5832920Abstract: A tracheal tube has an extruded suction lumen extending along its length on the outside of the curvature of the tube. The suction lumen opens internally to the main lumen through a series of holes, which increase in size towards the patient end of the tube. Towards the machine end of the tube, the suction lumen is connected to a suction source by which suction is applied to the suction lumen to remove secretions that collect inside the tube.Type: GrantFiled: September 19, 1996Date of Patent: November 10, 1998Assignee: Smiths Industries Public Limited Co.Inventor: Stephen James Field
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Patent number: 5817063Abstract: An epidural filter has a planar housing with a flat lower surface taped to the patient's skin. An outlet at one end of the housing is connected to the epidural catheter and opens onto the lower surface of the filter element. The inlet at the other end of the housing is shaped to receive the nose of a syringe and opens onto the upper surface of the filter element. The inlet is either fixed at an angle of about 30.degree. to the lower surface of the housing, or can be displaced upwardly to such an angle by means of a resilient portion, to facilitate connection to the inlet.Type: GrantFiled: July 30, 1997Date of Patent: October 6, 1998Assignee: Smiths Industries PLCInventor: Christopher Stratton Turnbull
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Patent number: 5818010Abstract: A transparent LCD back-lit display has a transparent indium-tin oxide heater layer extending across the display and a resistive metal strip heater, supported in a frame of low thermal conductivity, extending around its edge. One temperature sensor is mounted at the center of the display and another is mounted at the edge. The sensors are connected to a heater control unit, which controls power supplied to the heater layer and the edge strip heater to maintain the temperatures at the center and edge of the display equal.Type: GrantFiled: October 11, 1996Date of Patent: October 6, 1998Assignee: Smiths Industries PLCInventor: Michael Owen McCann
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Patent number: 5810244Abstract: A control for a fan has a temperature sensor and a humidity sensor the outputs of which are supplied to a processor. The processor switches on the fan when certain temperature and humidity conditions are met. The processor turns on the fan in response to an increase in temperature and humidity, a larger increase in humidity being required for a smaller increase in temperature. The fan is also turned on when humidity rises above a certain threshold value, which is lower for higher temperatures.Type: GrantFiled: December 27, 1995Date of Patent: September 22, 1998Assignee: Smiths Industries PLCInventor: Kwok Man Ngai
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Patent number: 5810779Abstract: A PCA pump has a fluid reservoir connected via a capillary and a gas vent filter to a cylinder having a piston urged outwardly by a spring to draw fluid into the cylinder. A button can be pressed by the user to press in the piston and dispense fluid. After actuation, the piston moves out to fill the cylinder with fluid and the button is disconnected from the piston until it has moved back to its outer position.Type: GrantFiled: December 12, 1996Date of Patent: September 22, 1998Assignee: Smiths Industries PLCInventors: Tony James Baker, Roland Henry Clyne Carter
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Patent number: 5803074Abstract: This disclosure relates to a valve for a resuscitator apparatus including a resuscitator bag and a reservoir bag. The valve is mounted in a coupling between the two bags. The valve comprises a reed flapper in a housing, the reed flapper having one side exposed to the interior pressure and another side exposed to the ambient pressure. The reed flapper is movable in response to a higher interior or ambient pressure (a pressure differential), to open a housing port to allow flow out of or in to the reservoir bag interior. The valve further includes a biasing part to increase the opening pressure differential in one direction or the other.Type: GrantFiled: November 25, 1996Date of Patent: September 8, 1998Assignee: Smiths Industries Medical Systems, Inc.Inventor: James W. Pope
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Patent number: 5797760Abstract: An electrical contact has a metal housing with a threaded bore opening at one end into a circular well. A plated contact pad has a threaded stem screwed into the bore and a circular pad member recessed in the well. The pad member has several cut-outs around its edge, which are engageable by projections on a cooperating tool by which the contact can be inserted and removed from the housing. Contact to the housing is made by a conductor secured to the housing by means of a bolt inserted in the rear end of the bore.Type: GrantFiled: June 18, 1997Date of Patent: August 25, 1998Assignee: Smiths Industries PLCInventor: Neil Andrew Swindlehurst
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Patent number: 5779687Abstract: A method of removing undesirable fluid from the respiration passages of a patient uses a closed system suction catheter assembly having a protective sleeve enclosing an aspirating catheter extending through a sliding seal in a patient coupling. The catheter has an antimicrobial surface such as formed by silver sulfadiazine which reduces the accumulation of bacteria while the catheter is within the protective sleeve and prolongs the useful life of the assembly.Type: GrantFiled: February 16, 1996Date of Patent: July 14, 1998Assignee: Smiths Industries Public Limited CompanyInventors: Craig J. Bell, William Hollister
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Patent number: 5779678Abstract: PCA apparatus has a container with a movable piston dividing the container into a lower chamber for medication liquid and an upper, air-filled chamber. A manually-actuated air pump is connected to the upper chamber so that air can be supplied to the upper chamber to displace the piston and discharge the liquid through a catheter. The air pump has a cylinder containing a plunger with a capillary inlet, to limit the rate at which air can flow into the cylinder and hence be pumped to the upper chamber. The lower chamber is filled through a removable inlet spike connector by pulling up the piston with an actuating rod projecting from the upper end of the container. The rod is frangible so that it can be removed after filling the lower chamber.Type: GrantFiled: November 22, 1996Date of Patent: July 14, 1998Assignee: Smiths Industries plcInventor: Roland Henry Clyne Carter
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Patent number: 5771889Abstract: A laryngeal mask assembly has a mask subassembly at its patient end with an inflatable ring and a diaphragm extending within the ring. The mask subassembly is attached to a tube by means of a mount comprising a backing plate and a tubular extension fitted on the patient end of the tube. The diaphragm is attached to the backing plate and the plate overlaps the patient end of the sealing ring extending close to the patient end of the assembly so as to inhibit rearward deflection of the patient end of the sealing ring.Type: GrantFiled: February 23, 1996Date of Patent: June 30, 1998Assignee: Smiths Industries PLCInventor: Eric Pagan
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Patent number: 5769071Abstract: A medical humidifier system for supplying humdified gas to a patient has a heat and moisture exchange device supplied with water from a pump, which is heated by a heater. A tracheal tube is connected to receive the humidified gas via tubing and a connector. The connector is mated with the machine end of the tracheal tube and includes a humidity sensor the output of which is connected to control humidification by controlling the speed of the pump and/or the temperature of the heater.Type: GrantFiled: January 23, 1997Date of Patent: June 23, 1998Assignee: Smiths Industries PLCInventor: Christopher Stratton Turnbull
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Patent number: 5749225Abstract: An hydraulic system has an hydraulic cylinder connected to a reversible pump by a first fluid line. A check valve assembly is connected in the first line and in a second line extending from the pump to a tank. The check valve assembly has a ball that seats on a conical valve seat to enable flow of fluid from the pump to the cylinder but to prevent flow in the opposite direction. A shuttle member in the check valve assembly is displaced by fluid pressure in the second line when the pump is reversed to unseat the ball and allow flow from the cylinder in the opposite direction via the pump to the tank.Type: GrantFiled: February 18, 1997Date of Patent: May 12, 1998Assignee: Smiths Industries PLCInventor: Gifford James Olney
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Patent number: 5746202Abstract: A securing device for an introducer of the kind for introducing an oral tube or laryngeal mask into a patient takes the form of a V-shape plate with a ribbed collar at its apex within which the tube or mask extends. A compressible gap extends from the collar to the edge of the plate and this is compressed, so that the collar grips the tube or mask, by fastening openings in the plate onto projections from the introducer. Alternatively, the securing device has a clip with two spaced engagement members so that the gap is squeezed closed by clipping the engagement members between two arms of the introducer.Type: GrantFiled: June 26, 1996Date of Patent: May 5, 1998Assignee: Smiths Industries PLCInventor: Eric Pagan
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Patent number: 5747946Abstract: A fluorescent discharge lamp has two glow mode electrodes wound around it in a helical fashion. One circuit drives the main electrodes at opposite ends of the lamp at high levels of brightness. Another circuit drives the glow mode electrodes at low levels of brightness, at about 10MHz. At intermediate levels of brightness, both the main electrodes and the glow mode electrodes are driven, the two sets of electrodes being driven for alternate on and off periods with the glow mode electrodes being on when the main electrodes are off and the glow mode electrodes being off when the main electrodes are on.Type: GrantFiled: September 10, 1996Date of Patent: May 5, 1998Assignee: Smiths Industries Public Limited CorporationInventor: Peter Michael Tyler
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Patent number: 5740572Abstract: An operating table has two leg sections each of which has a rotatable shaft extending along its length. Each shaft carries a gear that engages another gear fixed with the table such that raising or lowering the leg section causes the shaft to rotate. A helical spring extends helically around each shaft and is arranged to coil up when the leg section is lowered, so that the weight of the section is counterbalanced.Type: GrantFiled: March 26, 1997Date of Patent: April 21, 1998Assignee: Smiths Industries Public Limited CompanyInventor: Keith Hannant
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Patent number: 5727821Abstract: A fluid coupling has a male part that can be mated with a female part. The female part has an O-ring seal that seals with the outside of the male part. A helical retaining ring is located in a groove in the female part and engages behind a shoulder projecting from the male part. The groove has an inclined wall so that a withdrawing force applied to the male part causes the retaining ring to be forced into closer contact with the male part. A release ring extends around the female part at its forward end and is urged forwardly by a resilient wave washer. The release ring engages the retaining ring when it is pushed rearwardly so that the retaining ring is held away from the inclined wall enabling it to be expanded by the shoulder when the male part is withdrawn.Type: GrantFiled: July 15, 1996Date of Patent: March 17, 1998Assignee: Smiths Industries PLCInventor: Barry Charles Miller
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Patent number: 5725504Abstract: A spinal epidural needle assembly has a spinal needle assembly insertable in an epidural needle assembly. The spinal needle assembly has a rotatable cam lever on its hub, which engages a resilient tongue formed from the hub. The spinal needle assembly is locked with the epidural assembly by pushing in the cam lever, which displaces the tongue inwardly into frictional contact with the epidural needle hub.Type: GrantFiled: January 9, 1997Date of Patent: March 10, 1998Assignee: Smiths Industries Public Limited CompanyInventor: Michael Norman Collins
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Patent number: D398990Type: GrantFiled: April 22, 1997Date of Patent: September 29, 1998Assignee: Smiths Industries PLCInventors: Peter James Briggs, Janet Marie McMeekin
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Patent number: D398991Type: GrantFiled: April 22, 1997Date of Patent: September 29, 1998Assignee: Smiths Industries PLCInventors: Peter James Briggs, Janet Marie McMeekin
