US660799A

US660799A - Rotary engine.

Info

Publication number: US660799A
Application number: US71938699A
Authority: US
Inventors: David Morell
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-06-05
Filing date: 1899-06-05
Publication date: 1900-10-30
Anticipated expiration: 1917-10-30

Description

No. 660,799.. Patentedl Oct. 30,l |900.

D. RELL.

80T ENGINE. `plicaticm filed` June 5, 18

TTOH/VE YS No. 660,799. Patented Oct. 30, |900. D. MDRELL.

ROTARY ENGINE.

Application led June 5, 1899.) (No Model.)

2 Sheets-Sheet 2. [erg/4 MM5@ 'i 9 www@ NITED STATES PATENT OFFICE.

DAvID MoRELL, on cAssEL, GERMANY.

ROTARY ENGINE.

SPECIFICATION fermng part of Letters Patent No. 660,799, dated october 3o, 19oo. Application filed June 5, 1899. Sera] No. 719,386. (No model.)

To @ZZ whom it may con/cern,.-

Be it known that I, DAVID MoRELL, a subject of the Emperor of Germany, and a resident of Cassel, Germany, have invented certain new and useful Improvements in Pistons for Rotary Engines, Pumps, or the Like, of which the following is a specification.

This invention relates to the vanes and pistons of rotary engines, pumps, or blowers of that type in which two rotary pistons are geared together in such a manner that vanes or projections from one fit into corresponding recesses in the other.

The object ot' these improvements is to provide the contact-surfaces of the pistons and vanes with durable and effective packing without the use of leather cups or other similar flexible packing material. By the use of the new or improved packings the contactsurfaces will be kept tight and a high effi-Y ciency will be maintained. The construction of the pistons, vanes, and the like is such that not only is close contact maintained with regard to the walls of the casing of the engine, but also between the opposing surfaces of the intergeaiiing parts of pistons. This close contact is obtained by the employment of spring-controlled brass or other suitable metal plates, which are arranged in sets at certain distances apart and in such a manner that the spring-actuated plates upon one pistonV are in contact with a solid part of the other piston.

In describing the improved packings that part of a piston which projects farthest from its axis will be called a vane and that part of the surface which is nearer to the axis and is contained between two vanes will be called the hun In the accompanying drawings, Figure l shows a piston partially in end elevation and partially in cross-section. Fig. 2 represents a piston in longitudinal section taken along the line E D F, Fig. l. Fig. 3 is a longitudinal section of a piston along the line G D H, Fig. l. Figs. and 5 show the pistons in two of their working positions and illustrate the action of the spring-controlled packingplates.

Each piston is provided with vanes a, the form of which may be seen from the cross-section in Fig. 1. These vanes are preferably held in place in longitudinal grooves formed in the hubs 7l. By adopting this construction the hub may be produced as a cylindrical body, and the vanes may be secured in placewithout the necessity of screws or the like. The spring-actuated plates are represented in Figs. 2 and 3 at f, g, and h. Two sets of the plates f are inserted in every vane and two sets of the plates g and one set of the plates h in each part of the hub with which the vanes come into contact. To prevent 1at eral motion being imparted to the plates, the grooves into which they fit are made deeper or are recessed at the ends, and the plates are formed with corresponding projections to fit into the recesses. lhe plates f, g, and h are constantly forced outward in a radial direction by means of the spring-rings b c d, upon which the ends of the packing-plates rest. The rings h c d are contained within grooves formed within the vanes, the hubs, and the ends of the packing-plates.

The grooves or recesses in the packingplates are at different points provided or formed with small projections which extend toward the outside surfaces of the rings b c d. These projections 'are of the same or of a smaller width than a single ring and are arranged in sucha manner that the projections of three adjoining plates come into contact with diiferent rings. 'Ihe springs, which-are split, act in a more uniform manner. As shown in Fig. 2, the plate f rests upon the ring b, while in Fig. 3 the plate g rests upon the ring c. In this manner the first of three adjoining plates always rests upon the ring b, the second upon the ring c, and the third upon the ring d. In the set of plates h the fourth ring would again rest upon the ring h, the fth upon the ring c, and the sixth upon the ring d. In this way the force of the rings is most effectively utilized and every packing-plate is independently pressed against the opposing surface of the opposite piston.

The ends of the pistons may be square or straight across, if desired; butit ispreferred to form them as shown in the drawings, where a boss or projection extends from the edge of the ring b, as indicated at t. The springcontrolled plates are likewise formed with corresponding extensions e. The projections t" and the extensions e tit within grooves or recesses in the end plates of the IOO casing. The outward radial movement of the spring-controlled plates may thus be limited. The rings b c d also prevent theplates dropping out of the piston before the latter is placed within the casing.

In substitution for the spring-rings already described flat springs may be placed Within the grooves for the plates; but the rings are preferred.

The number and shape of the vanes may be modified, if required, according to the purpose for which the engine, pump, or the like is to be used.

What I claim, and desire to secure by Letters Patent, is-

1. In combination, a casing` with two rotating pistons having vanes and hubs with every here and there solid and elastic surfaces, these solid and elastic places upon the surfaces of the vanes and hubs being distributed in such a manner that intermittently a solid place of the one piston touches an elastic place of thesecond piston, substantially as described,

2. In combination, a casingwith two rotating pistons, having vanes and hubs with every here and there solid and elastic surfaces, for tightening intermittently between both the pistons, the solid and elastic places being of different breadths for obtaining an elastic :tightness in every moment during the rotation of the pistons in spite of the different velocity of the circumference of the vanes and hubs.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

nAvIDL MoRELL. [n s]