US1849802A - Cock - Google Patents

Description

Mlch 15, 19.32. J. L.. L. A. A. MoULET 1,849,802

COCK

Filed July 18. 1950 Mhul Patented Mar. 15, 1932 UNITED kSTATES ASSIGNOR T MARTIN, MOULET @cl CIE., OF OULLINS, FRANCE COCK Application led J'uly 18, 1930, Serial No. 463,882, and in France February 28, 1930.

The invention relates to cocks of the type in which throttling of the liquid inlet and outlet ports is effected by means of shutters, consisting of spring-pressed plates operated by a handle. i

. ln all the cocks of this type, the springpressed shutters are made of metal or possess a hard surface, and, in order to secure efficient` fluidtightness, the joint surfaces should be accurately tted, thus requiring an accurate machining, and hence a delicate and costlyy Y feature resides in that each shutter is made` of a mass of yielding or plastic material, such as cork, preferably held in a cup-shaped metal member adapted to protect said yielding material and in s ome cases to improve the fluid tightness. l Y j j According to another feature of the invention, the shutter thus formed is arranged in a bush integral with the key, the length 0f which is such that the plastic material is well protected laterally and cannot be damaged or torn when the cock is being operated.

Such improved cock, in which the shutters may be adapted to perform a rotary, a translatory, a spiral or any other motion, en-

joy the following important advantage:

thorough and durable liuid tightness, soundness, cheap manufacture, possibility of use with such liquids as benzene which dissolve the lubricantsv and cause metal Contact surfaces to seize together, etc.

In the accompanying drawings, selected solely by way of example:

Fig. l is diagrammatic cross-section of an improved cock according to the invention.

Fig. 2 is a longitudinal section of a constructural form of the invention.

Fig. 3 is a sectional side view of the same.

According to the diagrammatic showing of Fig. l, l denotes the body of the cock, having a cylindrical, conical or otherwise shaped chamber la; two bores 2 and 3 open into chamber la, their outer ends being adapted to be fitted with couplings (not shown) forsecuring impervious joints with suitable pipes. Nithin cavity l2L is arranged a' shutter, which comprises a member 4 of yielding or plastic material, held in a metal cup 5. The shutter is'pressed against port 2a wnichis to be throttled, by a spiral spring 6 Vor the like, bearing against a thrust-piece l engaging the opposite face of cavity l?, said thrust-piece` may form another shutter, preferably similar to that above described. u, 'i

The shutter may be imparted a rotary, tianslatoryor spiral inotiomby means of a key or stem y(notv shown) having a tubular transverse extension 8' adapted to receive shutter el, spring 6 and thrust member. Said extension of the operating stem encases shutter 4 upon almost its whole length, the outer end thereof being so 'machined thateXtension 8 moves within chamber 1a with a very slight clearance.

Due to this arrangement the shutter may be applied against the port to be throttled with enough pressure to secure the proper sealing, while the plastic.v material is prevented from escaping or slipping between eX- tension 8 and the wallof chamber la.

It will be readily understood that sufficient seating surface will have to be provided for the shutter` on the portion of the wall of chamber'liFL which surrounds port 2a, inorder to prevent the material of the'shutter from penetrating to an appreciable extent into said port. Y n l The above described disposition has many advantages-` It `willbe understood that the body l s only requires normal machining, whereby special accuracy is not indispensable, and yet imperviousness is .perfect on account ofthe yieldingness of shutter 4.` Frictionof the plastic material cannotcause any seizing, scratching or wear, likely to damage the joint seatings of the shutter. AsV a consequence, light metals maybe used for the manufacture of body l, such as aluminium alloys which would seize and get rapidly damaged under the effect of friction from metal shutters. The shutters are not ,subjected totorion in the case of cork suchI crevices or ducts are f sealed by the cup member a, and no leakage is to be feared. Finally, the manufacture-of such shutters is very simple and cheap. The

plastic material may be cork, in its natural state, or treated with a substance which does not impair its plasticity, rubber, fiber, etc.

The cock may comprise one or a plurality of shutters, said shutters being arranged, either around the same circumference or steplike, and capable of eifectingv any rotary, translatory, spiral orv other motion. In the same way, may be manufactured two-way or many-way cocks, distributors, etc.` without getting out of the scope of the present invention.

Figs. 2 and3 illustrate, solely by Way of example, an improved cock according to the invention; f

` According t0 this construction, the body 1 of the cock has two bosses 2 and 3, wherein are arranged couplings 9 and 10 provided for the purpose of impervious connection between the cock and two pipe sections 11 and 12. The body of the cock has a cylindrical bore 1, into which open the ports 2a and 3a corresponding tothe liquid inlet and outlet pipes.

Said ports may be covered or uncovered simultaneously by two shuttersconstructed on the principle above described.

' Each shutter i`s formedy with a cylindrical piece of cork or yielding material L -la, contained in a metal cup na. Pieces of` cork or yielding material 4-9 have a flat end bearing against the bottom of the cup, and an opposite `cylindrical end adapted to fit the inner shape of the body. Said cork or yielding material is held in the cap with certain pressure. f

SaidV shuttersv are arranged in a b-ush 8, a spring 6 being interposed between the cups 5, 5a. Brush 8 is integral with the stem 13 of the cock, to which is secured an operating handle 14, in any suitable manner, as for instance by means of clamp fitting with two clamping screws 15 and 16. The body of the cock is sealed by a threaded stopper 17, which may be used as a sole for fixing saidcock in place and also provides a thrust-piece 18 for the stem of the cock.

Moreover, the stem 13 of the cock extends through a stuling-box arranged in the head of the cockfor the purpose of securing an impervious joint. Said stuiiing-box may consist for instance of a bush 20, a plastic joint 21, a j oint-pressing ring 22 and a joint squeezing-nut 2 f f The stem of the cock is formed with` a lug 24' (Fig. 8) movable between two shoulders ports, the cock is open .and the liquid is allowed to flow.

It is to be noted that the passage provided for the liquid has a large area and the loss of head due to the cock is therefore very slight.

lhe cock maybe provided either with an imperative controlin both directions, or with a one way control and a'return spring,`such an arrangement being advantageous inthe case of distance control-.fv Gwing to the shuttersbeing held fast bya spring,vibrations do not affect the setting of the cock, an automatic braking action being obtained in all lpositions. ff v Having now described my lnvention, what I claim as new andl desireto secure by Letters Patent is:y

A cockcomprising in combination a cock bodyl having at least two diametrically opposite ports, a rotary plug embodying an integral sleeve coaxial with said ports in the closed position of the plug,'two shutter Vmembers slidable in said sleeve, each comprising a cup shaped metal member and an outwardly projecting insert of yieldingfmaterial held therein and a helical spring engagingthe rear faces of said cups tourge said shuttersV outwardly, said sleeve extending close to the inner wall of said body tosurround-said yielding inserts adjacentV saidV inner wall while leaving a clearance between the plug and cock body. Y

In testimony whereof I have signed my name to this specification. Y

v 'JEAN LOUIS LON ALEXANDRE ALBERTl MOULET,

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