Patents by Inventor Christopher John Woosnam

Christopher John Woosnam has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10773041
    Abstract: A tracheostomy tube (1) has an adjustable flange (2) that can be slid along the tube and locked in the desired position. The flange has a one-piece resilient nut (40) that is threaded on a tubular projection (30) on the flange. The nut has an integral inner sleeve (44) divided into separate fingers (48) the outside of which are engaged by the inside of the tubular projection. The flange is locked in position by screwing the nut onto the projection so that the fingers that are forced inwardly to engage the outside of the tube.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: September 15, 2020
    Assignee: Smiths Medical International Limited
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Patent number: 10603454
    Abstract: A tracheostomy tube assembly comprises an outer tracheostomy tube (1) and an inner cannula (20) fitted in the tube. The machine end of the inner cannula has a collapsible region (22) formed by a plurality of curved or bent struts (26) extending parallel with one another between a machine end collar (28) and a patient end collar (27). The struts (26) carry outwardly-projecting catches (23) arranged to engage a rib (24) extending around the inside of a hub (16) at the machine end of the tube and thereby resist removal of the cannula from the tube. The inner cannula (20) is removed by twisting the machine end collar (28) so that the struts (26) collapse inwardly and thereby disengage the catches (23) from the rib (24).
    Type: Grant
    Filed: April 2, 2016
    Date of Patent: March 31, 2020
    Assignee: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Timothy Bateman, Steven James Field, Andrew Thomas Jeffrey, Neil Steven Veasey, Christopher John Woosnam
  • Patent number: 10603455
    Abstract: A tracheostomy tube (1) has a movable and lockable flange (2) by which the tube can be supported about the neck of a patient. The flange has a rotatable locking ring (34), which is threaded with a housing (26) fixed with the wings (22 and 23) of the flange. A resilient sleeve (50) is located in a recess (44) of the locking ring between a compression surface (45) on the locking ring at one end and the floor (46) of the housing at the opposite end. When the locking ring (34) is twisted it is moved forwardly along the housing (26), thereby compressing the resilient sleeve (50) axially. The axial compression causes the sleeve (50) to expand radially against the outside of the tube (1) and the inside of the housing (26), thereby locking the flange (2) in position.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: March 31, 2020
    Assignee: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20190151588
    Abstract: A tracheostomy tube (1has an adjustable flange (2) that can be slid along the tube and locked in the desired position. The flange has a one-piece resilient nut (40) that is threaded on a tubular projection (30) on the flange. The nut has an integral inner sleeve (44) divided into separate fingers (48) the outside of which are engaged by the inside of the tubular projection. The flange is locked in position by screwing the nut onto the projection so that the fingers that are forced inwardly to engage the outside of the tube.
    Type: Application
    Filed: January 18, 2017
    Publication date: May 23, 2019
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20190009041
    Abstract: An inflation valve (20) for a sealing cuff (10) on a tracheal tube (1) has a helical ceramic spring (40) that urges a valve seal (45, 87) against a valve seat (28, 128). The actuator (51) by which the seal (45, 87) is lifted from the seat to open the valve includes a spring latch mechanism (53). The latch mechanism has three spring fingers (56) that are held resiliently in compression in a recess (60) before the first actuation of the valve. When first used, the actuator is moved forwardly to open the valve so that the free ends of the spring fingers clear the end of the recess and deflect outwardly. When the actuator (51) is released to allow the valve to close, the spring fingers (56) engage a latch surface (63) so that the spring (40) is held in greater tension.
    Type: Application
    Filed: August 12, 2016
    Publication date: January 10, 2019
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Rabeya Khanom, Christopher John Woosnam, Mansour Youseffi
  • Publication number: 20190009042
    Abstract: A tracheal tube cuff inflator/indicator has a coloured pressure flag (211) slidable against the action of a spring (212) along the inside of a transparent housing (210) by change of pressure. The flag has three coloured regions along its length. A sleeve (310) with a transparent central window (311) is slidable frictionally along the outside of the housing so that the window can be aligned with a central green region (211G) when correct pressure is achieved in the cuff (10). Any change in pressure of the cuff (10) moves the flag (211) so that the green portion (211G) moves away from the window (311) in the outer sleeve, thereby indicating to the user that the cuff pressure has changed. The inflator/indicator also has an elastomeric balloon (220) acting as a pressure reservoir that can be manually compressed if it is necessary to increase pressure in the cuff.
    Type: Application
    Filed: December 20, 2016
    Publication date: January 10, 2019
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Timothy Bateman, Stephen James Field, Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20180236194
    Abstract: An inner cannula (200) for a tracheostomy tube (100) has an extruded shaft (20) with a smooth bore. A helical reinforcement element (23) is moulded onto the outside of the shaft the axial strength of which is increased by multiple groups of short bridging elements (24) extending between two adjacent turns of the reinforcement element. The bridging elements (24) are spaced around and along the shaft (20).
    Type: Application
    Filed: August 15, 2016
    Publication date: August 23, 2018
    Applicant: Smiths Medical International Limited
    Inventors: Timothy BATEMAN, Stephen James FIELD, Andrew Thomas JEFFREY, Christopher John WOOSNAM
  • Publication number: 20180169362
    Abstract: An inner cannula (2) for a tracheostomy tube (1) has a resilient catch (23) at its machine end. The catch has a two angular teeth (27) and (28) projecting outwardly towards its free end. One tooth (27) is shaped and positioned to engage in a groove (40) on the inside of a hub (16) at the machine end of the tube when the inner cannula is fully inserted. The other tooth (28) is smaller and is spaced rearwardly along the catch. The hub (16) also has a shallow rounded bead (44) projecting inwardly and spaced a short distance to the rear of the groove (40). When the inner cannula (2) is pulled out of the tube (1) the smaller tooth (28) engages the bead (44) on the hub (16) causing the catch (23) to deflect inwardly. In this way, the larger tooth (27) is displaced slightly out of the groove (40) making it easier for it to ramp out of the groove and allow the cannula to be withdrawn with little additional pulling force.
    Type: Application
    Filed: June 15, 2016
    Publication date: June 21, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Timothy Bateman, Stephen James Field, Andrew Thomas Jeffrey, Neil Steven Veasey, Christopher John Woosnam
  • Publication number: 20180169364
    Abstract: A tracheostomy tube introducer (1) has a patient end region (10) on which the tube (2) is mounted and that is curved in one sense. The introducer has a machine end region (11) projecting from the rear end of the tube (2) to provide a handle that curves in the opposite sense to the patient end region (10) so that the introducer has an S shape along its length. A bore (24) for a guide member extends from the patient end tip (14) of the introducer and opens in the machine end region (11) through a side opening (25). The introducer 1 is provided in a kit (200) with the tracheostomy tube (2) and a dilator (202) having the same general S shape as the introducer.
    Type: Application
    Filed: May 31, 2016
    Publication date: June 21, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20180104428
    Abstract: A tracheostomy tube assembly comprises an outer tracheostomy tube (1) and an inner cannula (20) fitted in the tube. The machine end of the inner cannula has a collapsible region (22) formed by a plurality of curved or bent struts (26) extending parallel with one another between a machine end collar (28) and a patient end collar (27). The struts (26) carry outwardly-projecting catches (23) arranged to engage a rib (24) extending around the inside of a hub (16) at the machine end of the tube and thereby resist removal of the cannula from the tube. The inner cannula (20) is removed by twisting the machine end collar (28) so that the struts (26) collapse inwardly and thereby disengage the catches (23) from the rib (24).
    Type: Application
    Filed: April 2, 2016
    Publication date: April 19, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Timothy Bateman, Steven James Field, Andrew Thomas Jeffrey, Neil Steven Veasey, Christopher John Woosnam
  • Publication number: 20180043119
    Abstract: A speaking valve assembly (2, 200) for fitting to the machine end (13) of a tracheostomy tube (1) has a one-way valve (23, 236) that allows inhalation but prevents exhalation. The assembly further includes a pressure relief arrangement that remains closed during normal respiration and vocalisation but opens when pressure in the assembly rises above a normal level. In one arrangement the pressure relief arrangement takes the form of a ball valve (30) with a ball (32) that is lifted away from an opening (31) by excess pressure but falls back to block the opening when pressure reduces. An alternative pressure arrangement has a slidable collar (226) that normally covers vent apertures (223) in a housing (220) of the assembly. When pressure in the assembly rises above a normal level the collar (226) is pushed out to expose the vent apertures (223) and allow air to escape.
    Type: Application
    Filed: February 15, 2016
    Publication date: February 15, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Timothy Bateman, Stephen James Field, Mark Andrew Graham, Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20180043118
    Abstract: A tracheostomy tube has a ball formation (31) of part-spherical shape at its machine end (13). The ball formation (31) is retained between two rings (33) and (34) projecting rearwardly from the tube neck flange (20) to enable movement between the tube shaft (10) and the flange in multiple planes.
    Type: Application
    Filed: February 15, 2016
    Publication date: February 15, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20180021540
    Abstract: A valve (20) for the sealing cuff (10) of a tracheal tube has a valve member (40) urged against a valve seal (36, 37) by an MRI-safe resilient member (42) of neoprene or nitrile. The valve includes a two-part actuator (70) by which the valve member is displaced. Before use, during storage, the valve member is in a closed position with the resilient member relatively relaxed. When the valve is opened for the first time by inserting a syringe or the like, the two-part actuator arrangement is moved forwards to unseat the valve member to allow flow. This causes inclined surfaces (88) and (92) on the two parts (72) and (73) of the actuator to rotate the forward part slightly. When the syringe is removed to allow the valve to close, the forward part of the actuator latches on a surface (34) of the housing (21) in an operational position where the valve is closed.
    Type: Application
    Filed: January 19, 2016
    Publication date: January 25, 2018
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20170368284
    Abstract: A tracheostomy tube (1) has a movable and lockable flange (2) by which the tube can be supported about the neck of a patient. The flange has a rotatable locking ring (34), which is threaded with a housing (26) fixed with the wings (22 and 23) of the flange. A resilient sleeve (50) is located in a recess (44) of the locking ring between a compression surface (45) on the locking ring at one end and the floor (46) of the housing at the opposite end. When the locking ring (34) is twisted it is moved forwardly along the housing (26), thereby compressing the resilient sleeve (50) axially. The axial compression causes the sleeve (50) to expand radially against the outside of the tube (1) and the inside of the housing (26), thereby locking the flange (2) in position.
    Type: Application
    Filed: December 15, 2015
    Publication date: December 28, 2017
    Applicant: SMITHS MEDICAL INTERNATIONAL LIMITED
    Inventors: Andrew Thomas Jeffrey, Christopher John Woosnam
  • Publication number: 20170231659
    Abstract: A transfer device includes an elongate tube defining a lumen configured to support an organism and an obstruction positioned along the elongate tube. The obstruction is configured to prevent the organism from moving proximally past the obstruction, such that the obstruction defines a distal end region of the elongate tube in which the organism can move along the lumen of the elongate tube.
    Type: Application
    Filed: February 13, 2017
    Publication date: August 17, 2017
    Inventors: Stephen James Field, Timothy Bateman, Andrew Thomas Jeffrey, Christopher John Woosnam