Gas administering equipment
United States Patent 2047216

This invention relate. to coaducting and delivering fluids. This invention has utility when incorporated for elimination of electrical hazards and in the delivering of fluids controllably to a patient. Referring to the drawing: Fig. 1 is a fragmentary embodiment of the invention in an installation...

Mckesson, Elmer I.
Application Number:
Publication Date:
Filing Date:
Martha, Mckesson F.
Primary Class:
Other Classes:
128/205.24, 128/206.26, 139/1R, 152/DIG.2, 174/47, 174/102SC, 251/152, 251/303, 361/215, 474/90
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This invention relate. to coaducting and delivering fluids.

This invention has utility when incorporated for elimination of electrical hazards and in the delivering of fluids controllably to a patient.

Referring to the drawing: Fig. 1 is a fragmentary embodiment of the invention in an installation for anaesthetizing a patient; Fig. 2 is a view of the delivery terminus or mask in the installation of Fig. 1; Fig. -3 is a section on the line I-HIII, Fig. 2; Fig. 4 is a partial section on the line IV-IV, Fig. 2; Fig. 5 is a section on the line V-V, Fig. 2; Fig. 6 is a fragmentary bottom plan view of the mask, that is, from the reverse side to the showing of Fig. 2; and Fig. 7 is a fragmentary view of the flexible passage member or duct to the mask from the source of supply or machine.

Valve mechanism for controllably determining pressure and mingling of supply is shown as a machine I with which there is assembled metallic fitting 2 as an electrical conductor. This fitting 2 is a terminus for hose 8, shown as having a general fabric and rubber body 4, reinforced internally by helical metallic wire spring 5, having end 6 thereof anchored with the terminal fitting 2 for a continuity of electrical conductivity throughout this hose 3 from the fitting 2 to the remote fitting .

Additionally, internally of this hose body a there is herein provided lining 8 of electric conductivity effectiveness. This lining 8 in practice is a rubber loaded with 50 per cent of a.pure carbon black, known to the trade as "Special Carbon P-33". There is, accordingly, in this homogeneous lining 8 a degree of electrical conductivity effective against rise of any static charge or the existence of electrical tension as an unbalanced condition, for the reason that any leakages from electrical sources or responses to radio conditions or flow of gases is dissipated uniformly by this electrical conductor lining 8 to the fittings 2, while any such tendency to promote or disturb conditions even in the body 4 of the hose 3 is minimized against hazard-by having the helix 5 contact the lining and connected at its termini 60 6 with the respective fittings 2, 7.' In addition to meeting or anticipating hazard from such disturbed condition in the conductor from the machine 1, there is no occasion for annoyance of the patient 9 by the occurrence of any noise from the snapping or other electrically disturbing features. The attendant, as normally conducting the administration, is in position to touch the flesh of the patient as well as hold the hose 8. More especially, there is a tendency with those administering anaesthesia, to position body 90 of the mask. This mask body S0 is herein shown provided with tubular port II centrally thereof, which is assembled with metallic fitting 12 as a conductor having terminus i3 which may engage the fitting 7 from the hose 3. This electrical conductor fitting 82 is thus effective from the hose 8 against any lack of equilibrium in the electrical or electrostatic condition of the mask body I9. This mask body I' is also shown as having a 50 per cent weight of carbon content relatively to the pure gum rubber as a filler contributing to the body of the rubber for retaining form into which it may be manipulated for use with a special contour, as broad or narrow. This means that the mask 0 is homogeneous, has electrical conductivity throughout, and furthermore, is of a quality to submit to distortion and hold such shape. For instance, the width may be increased by applying pressure transversely thereof inward. Contrariwise, to narrow the mask in adapting it to the face of the patient, such pressure may be applied to opposite sides, say adjacent rivets 46 having snap heads IS.

Additionally, these snap heads (S may be engaged by connection IS about the head of the patient 9 in locating the mask at the mouth and nose of the patient when the mask is, as herein shown, adapted for oral and nasal use.

With this connection I 6 an electrical conductor, there is dissipation directly to the cheek of the patient 9 so that no tendency for jumping of the spark may be had to annoy the patient by the prickly sensation, nor to create the hazard of disturbing the patient nervously or the still greater hazard of combustion in the event the administered gases should be of a nature to ignite, as mixtures of ether, acetylene, ethylene with nitrous oxide or oxygen. As herein disclosed, this mask body 10 of plastic attributes and electrical conductor properties, has vulcanized assembly connection 17 to tubular cushion rim 18 of thin sheet rubber. This thin sheet rubber 18 has passage 19 normally contoured and formed therein as the stable condition for this cushion. From this chamber 19 there is stem 20 having therein tubular fitting 21 internally threaded. Knurled head 22 has stem 23 engaging this internally threaded portion 21. This stem 23 as externally threaded, has opening from the inner terminus thereof to lateral port 24.

Accordingly, in rotating the knurled head 22 by a turn or so as to the stem 20, the port 24 is ex6 posed so that in applying pressure to the cushion 18, the normal content of air may be reduced, and then, with the chamber 19 thus collapsed or partially=deflated, the valve may be closed by reverse operation of the knurled head 22. Accordingly, the degree of softness for this cushion 18 by gas quantity therein may be nicely determined for promoting comfort in fitting this mask at the face of the patient 9. This comfort in fitting also is a factor against leakage. This cushion then is not loaded with electrical conductivity to the extent of in itself precluding static charge to be isolated therein away from the patient. As before suggested, this electrical charge accumulation against hazard may be dissipated by the connection 16 or by the hand of the operator engaging such mask body 10.

The patient 9 inhales in receiving supply from the machine I and then exhales. The exhalation may in part flow back toward the machine I. More or less of the residue may be exhausted. To this end, the fitting 12 has located therein sleeve 25 having internal shoulder 26 against gasket 27.

As protruding beyond this fitting 12, this sleeve 25 has externally threaded portion 28. This portion 28 may be engaged by internally threaded portion 29 of flanged housing 30. In this assembly the housing 30 may clamp gasket 31 in a position to oppose the gasket 27.

This housing 30 has ledge or seat 31' beyond the terminus of the sleeve 25. Against this seat 31', disk 32 is freely rockable into snug closing position.

This disk 32 is provided with stem 33 engaged by screw 34 loosely assembling this disk 32 with arm 35. This arm 35 has depending parallel eyes 36 providing bearings loosely about shaft 37. The arm 35 has eye 38 which may be engaged by hooked terminus 39 of torsion spring 40 wrapped about the shaft 37 and having its remote terminus 4* 41 coacting with radially extending slot 42 longitudinally of the shaft 37. This shaft 37 has at one end, head 43 loosely mounted in nut 44 as a bushing in the frame 30. Notches 45 permit rotation of this bushing and thereby determine the 5o pull action of the head 43 on the shaft 37 remote from the head 43. This shaft 37 as protruding from the opposite side of the frame 30 has seat 46 with which may coact set screw 47 through knurled finger wheel 48. This means that the wheel 48 as manually rotated angularly shifts the shaft 17. This angular shifting is determined.

In one direction at stop 49 to engage the set screw 47, the wheel 48 has its graduations 50 with zero registered at indicator point 51. This may be an adjustment for ready exhalation exhaust. If it be desired to have the exhalation exhaust, say at 5 millimeters of mercury pressure, the knurled wheel 48 may be turned to have the graduation 5 at the pointer 51; for 10 millimeters of mercury pressure, at the point 10; and for 20 millimeters of mercury pressure, at the point 20.

It is thus seen there is provided a ready means for adjusting the pressure at which the disk 32 may be lifted. This adjustment is a frictional loading for the wheel 48 is spaced from the frame 30 by concavo-convex spring washer 52 having slot portion 53 astride the stop 49.

Accordingly, this disk or washer 52 offers resistance against ready shifting of the adjusting wheel 48, while this wheel 48, as hand-turned, increases the torsion of the spring 40. This angular adjustment and its friction is entirely independent of the adjustment of the spring 40 as to the resistance of the movement of the arm 35. Adjustment of the bushing 44 may determine the frictional holding at adjustment of the wheel 48 independently of disturbing the spring 40. The adjustments of the spring 40 are such that as the arm 35 moves it is at all times, with its loose disk 32, free to move to an open position; which, as an open position is the same whether the adjustment at the graduations 50 be for zero or 20 millimeters of mercury. It is thus seen that with a compact simple exhaust valve, there is a control for exhalation which may nicely be adjusted over the practical range for operation and with patients; and that, in this operation, the manipulation is with elimination of electrical hazards from combustion or annoyance to the patient.

What is claimed and it is desired to secure by Letters Patent is: Gas administering equipment embodying a respiration hose of flexible plastic body, having a helical metallic reinforcement, and terminal metallic fittings connected with the reinforcement terminally anchored in the fittings and therebetween fully embedded in the walls of the plastic hose for maintaining reinforcement flexibility for the full length of the hose.