Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Reexamination Certificate
1999-02-19
2001-08-28
Weiss, John G. (Department: 3761)
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
C128S204260, C128S204270
Reexamination Certificate
active
06279575
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to regulators for underwater breathing apparatus, in particular to regulators having a tube which bypasses the chamber of the air-flow regulating device.
2. Description of the Related Art
Regulators of this type are known in the art and consist, as described for example in U.S. Pat. No. 4,002,166, of a regulator comprising a box-like body containing an air-flow regulating device which is connected to an air inlet hose by means of a suitable valve controlled by the said regulating device and in which, downstream of the valve, a tube draws the air from the inlet hose and conveys it directly to a mouthpiece tube, thereby bypassing the chamber of the flow regulating device.
This type of bypass system was designed with the aim of making regulator operation easier. This is achieved because, by bypassing the chamber of the regulating device, a pressure drop is created in a known manner inside the chamber and this reduces the effort the diver needs to exert in order to inhale since the diaphragm in the regulating device is subjected to a pressure difference that allows it, via a lever, to act on the air inlet valve such that it opens the inlet hose.
Regulators of the type described above with reference to U.S. Pat. No. 4,002,166 nevertheless have certain disadvantages: the bypass tube through which the air is conveyed from the inlet hose to the mouthpiece is actually outside the box-like body of the regulator, which means that the mouthpiece tube and the air inlet hose need to be fitted with suitable connecting and sealing means in order to be coupled to the bypass tube, all of which does nothing for the structural compactness of the regulator.
SUMMARY OF THE INVENTION
The object of the present invention is therefore to provide a regulator in which the air bypass tube is formed integrally within the box-like body of the said regulator, for example by moulding the box-like body if the latter is made of plastic, thereby avoiding the need for an external bypass tube fitted with sealing and connecting means.
This object is achieved by means of a regulator having a bypass tube comprising: a box-like body containing the device for regulating the flow of air; a tube connected to this box-like body onto which the mouthpiece is attached; an air inlet hose connected to the box-like body by means of an inlet valve which is controlled by the regulating device; one or more exhaust hoses formed in the box-like body; and a bypass tube which connects the inlet hose with the mouthpiece tube, in which this bypass tube is formed integrally within the box-like body of the regulator.
REFERENCES:
patent: Re. 31785 (1985-01-01), Netteland
patent: 2121311 (1938-06-01), Anderson et al.
patent: 2387123 (1945-10-01), Deming
patent: 2663121 (1953-12-01), Ramsey
patent: 2755799 (1956-07-01), Marty
patent: 2843120 (1958-07-01), Thauer et al.
patent: 2854972 (1958-10-01), Cummins
patent: 3095890 (1963-07-01), Cousteau et al.
patent: 3468307 (1969-09-01), Cummins
patent: 3570808 (1971-03-01), Wrenn
patent: 3978854 (1976-09-01), Mills, Jr.
patent: 3991785 (1976-11-01), Trinkwalder, Jr.
patent: 4002166 (1977-01-01), Oliver
patent: 4066076 (1978-01-01), Williamson
patent: 4219017 (1980-08-01), Shamlian et al.
patent: 4253455 (1981-03-01), Netteland
patent: 4616645 (1986-10-01), Pedersen et al.
patent: 4796618 (1989-01-01), Garraffa
patent: 5042473 (1991-08-01), Lewis
patent: 5701890 (1997-12-01), Pietrelli
patent: 5724961 (1998-03-01), Tistrand
patent: 0 759 314 (1997-02-01), None
patent: 2 028 142 (1980-03-01), None
patent: 95-12519 (1995-05-01), None
Bailar et al., Chemistry 2d ed. pp. 96-99 & 106 Academic Press, Dec. 1984.*
McPherson et al., Respiratory Therapy Equipment, pp. 22-29 C. V. Mosby Co., Dec. 1981.
HTM Sport S.p.A.
Larson & Taylor PLC
Weiss John G.
Weiss, Jr. Joseph F.
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