| 摘要 |
<p>1,105,543. Valves. RONSON CORPORATION. 10 March, 1965 [13 March, 1964], No. 10260/65. Heading F2V. [Also in Division B3] In a valve for supplying high vapour pressure fuels such as butane and propane to a burner or other combustion device, the fuel flows from an inlet 14 via a chamber 16 and a passageway 40, which is formed between the flattened portion 38 of a cylindrical section 36 of an elongate plunger 34 and a cylindrical passage through a seat member 18, and is metered through a uniform section cylindrical orifice 24 by adjustment therein of the frusto-conical forward end 44 of plunger 34 which is manually adjustable on threads 48, upon rotation of knob 54, and of which a cylindrical portion 42 is a close fluid sealing fit within the orifice 24 and is of at least the same axial length. An additional fluid seal may be provided by engagement of the tapered shoulder (58) (Fig. 3, not shown), with a similar surface on member 18. Fuel issuing from orifice 24 into a mixing device 26 draws air through radial holes 28 thereof for delivery to a burner (not shown) and the holes 28 may be shielded by skirt 30 which may also be provided with air holes 32. The tip of plunger 44 terminates sharply and the gas flow through orifice 24 may suddenly be greatly increased upon complete withdrawal of the plunger 44 to dislodge particles &c. therefrom. In an alternative embodiment, the tapered tip 44 comprises three tapered flats 60 upon an otherwise cylindrical portion of the plunger and a front end chamfer 62 which permits entry of the steel plunger into a slightly undersize bore 24 of the aluminium or brass member 18 which is " sized " upon assembly of the valve by rotary force fitting the plunger orifice assembly (see Division B3). The orifice of the frustoconically tapered embodiment may similarly be sized.</p> |
