US1292905A

US1292905A - Air-pump.

Info

Publication number: US1292905A
Application number: US20675617A
Authority: US
Inventors: Samuel A Snell
Original assignee: MOON BROTHERS Manufacturing Co
Current assignee: MOON BROTHERS Manufacturing Co
Priority date: 1917-12-12
Filing date: 1917-12-12
Publication date: 1919-01-28
Anticipated expiration: 1936-01-28

Description

sl. iA. SNELL. 'AIB PUMP.

APPLICATION FILEI) DEC.I2| 19H.

Patented Jan. 28, 1919.

UNTTED STATES PATENT FFTCE.

SAMUEL A. SNELL, OF MINERAL RIDGE, OHIO, ASSIGNOR TO THE MOON BROTHERS MANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MIS- SOURI.

AIR-PUMP.

Specification of Letters Patent.

Patented Jan. 28, 1919.

To all whom t may concern:

Be it known that I, SAMUEL A. SNELL, a citizen of the United States, and a resident of Mineral Ridge, in the county of Trumbull and State of Ohio, have invented a certain new and useful Air-Pump; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it -appertains to make and use the same,'ref erence being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this speciication.

My invention has for its object to produce an eiiicient pump that may be made at a low cost ofproduction.

Tire pumps have heretofore been made by` uniting the cylinders with a cast iron base by forming a thread on the two parts and threading the cylinders into the castings. By my invention is provided aA pump wherein the base and fparts may be made from sheet metal parts whereby the pump may be made largely by die stamping and thus pumps containing my invention may be rapidly constructed and consequently at a low cost. My invention not onlyv relates to forming an efficient pump of die stampings, but also to forming one that is durable and which will stand the strains of long continuous and rough usage. Other advantages and features of the invention will appear from the following description of a pump containing the invention and from the drawings in which the pump is illustrated.

Figure 1 of the drawings illustrates a vertical sectional view of the pump, Fig. 2 is a larger sectional view of the lower end of the pump showing the manner in which the cylinders are placed in the base before they are inally secured in their relative positions. Fig. 3 is a view similar to that shown in Fig. 2 showing the cylinders finally secured in the base. Fig. 4 is a top view of a base, and Fig. 5 is a view of part of the base. Fig. 6 is a view of part of one of the piston rods and Fig. 7 is a sectional view taken on the line 7-7 indicated in Fig. 6 showing the means used for securing the handle and the piston in position.

1 is the low pressure cylinder and 2 is the high pressure cylinder of the pump. They are provided with piston rods 3 and 4 to.

which are secured the pistons 5 and 6. The pistons 5 and 6 arem provided with leather cups 7 and 8 of the type well knownin the art. The edge of the leather cup 7 is turned. downward, while the edge of 'the leather cup 8 is turned upward.

The cylinders 1 and 2 are' secured in a base 9. The base 9 is formed 0f two parts, the upper part 10 being an oblong member formed of sheet material having stepped up portions 11 and 12. The portion 12 is provided with openings 13 and 14 surrounded by depending flanges 15 and 1G. The cylinders 1 and 2 are provided with iiattened beads 17 'and 1S near the lower ends. The cylinders 1 and 2 are inserted in the openings 13 and 14. The under curve portion between the undersides of the

beads

17 and 18 and the lower ends of the cylinders 1 and 2 fit the curved portions formed by forcing the

flanges

15 and 16 downward in the formation of the upper part 10 of the base 9 when the said upper part 10 is stamped by means of a press. As shown in Fig. 2, the ends of the cylinders are inserted into the upper part 10 of the base 9 until the

flattened beads

17 and 18 rest against the p0rtion 12 of the part 10. The wide annular area of the undersides of the beads resting against the upper side of the portion 12 of the base forms a sealing area when the cylinders are secured in the openings 13 and 14.

After the cylinders are inserted in position, the lower edges are forced outward and so as to clench over the corners of the lower edges of the

flanges

15 and 16 and thus draw the

beads

17 and 18 against the surface of the portion 12 of the base. The metal of the cylinders being placed against the corners of the lower edges of the

flanges

15 and 16, tightly seals the cylinders in the base 9 and at the same time securely holds the cylinders in their positions notwithstanding the rough usage to which the pump may be submitted. The wide area of the beads and the cleuch of the lower edge of the cylinders around the corners of the ianges not only tightly seals the cylinder, but also keeps the cylinders in their parallel relation to each other and in right angular positions relative to the base.

Vhen the edges of the cylinders are turned while the ends of the cylinders below the beads are also flared to the same eXtent whereby the surfaces of the cylinders below the beads and the surfaces of the flanges are brought into close sealing contact and also to a certain extent the connection between the cylinders and the base is strengthened. The

flanges

15 and 16 being turned down ward the corners formed between the inner surfaces of the flanges and the portion 12 of the base will be rounded which permits the cylinders to be inserted in the flanges although the diameters of the flanges may be small enough to form an exceedingly tight fit between the cylinders and the flanges, while if the

flanges

15 and 16 were raised, the cylinders could not be inserted in the flanges without a great deal of diliiculty owing to the fact that the corners of the lower ends of the cylinders would engage with the corners of the flanges. The curve of the upper corner of the flanges not only fits the curve of the beads of the cylinders, but the corners of the flanges form means whereby the lower ends of the cylinders grip the flanges, the metal of the cylinders being forced with great pressure against the square corners of the flanges and consequently are more or less penetrated by the square corners which tightly hold the cylinders. The ends of the cylinders being turned over the corners of the flanges, the pistons 5 and 6 may pass the lower end or edges of the cylinders without causing the cups 7 and 8 to be damaged. Ordinarily, if the cups 7 and 8 pass the lower edges of the cylinders, the rough edges will soon destroy the cups. In the construction shown, the rounded edges of the lower ends of the cylinder prevents any injury to the cups. rThe cup 7 which is turned downward may thus pass to the very extremity of the cylinder 1 without being destroyed. In constructions of this type,

. the cylinders are usually threaded into the base. rlhe cylinders are made of thin metal .and consequently when the threads are cut into the metal they weaken it. By my invention threading, welding and brazing are entirely done away with, and the pump is so constructed that it may be made largely by die pressing.

The base 9 is closed by the part 19 which is provided with two embossed portions 20 that rise to the inner surface of the part 10 of the base. Ihe oblong member 19 is sealed and clenched by the inturned edge or flanges 21 of the part 10 of the base. The central portion of the part 19 is located close to the ends of the cylinders 1 and 2 and yet at a distance sufficient to allow the air to pass from the cylinder 1 to the cylinder 2. The

embossed portions 20 are located at opposite ends of the oblong base 9 and beneath the points where the feet of the operator are usually placed in operating the pump. This arrangement strengthens the base to a great extent.

rllhe rods 3 and 4: are provided with means for securing the pistons and the handle in position. The rods are provided with channels 22 semi-circular in form near the upper and lower ends of the rods. The channels are formed in the lower ends just above the pistons, while in the upper ends they are formed at points about equal to the diameter of the handle from the upper ends. Wire rings 23 are placed in the channels 22. The pistons 5 and 6 are clamped against the wire rings by suitable nuts 24;. The handle 25 is also secured between the rings 23 and washers 26 by the nuts 27. The upper rings 23 on the rod 4 coperates with the packing nut 28 to form a limiting stop in the downward movements of the pistons. The channel and rings form a means in conjunction with the nuts for holding the parts together. This arrangement is an efficient means for that purpose and may be made at a low cost of production.

1 claim:

1. In an air pump, the combination of a cylinder and a base, the base having a depending flange, the cylinder having a flattened bead and a flaring edge, the flange gripped between the bead and the flaring edge, the surface of the bead and the end of the cylinder fitting the top surface of the base and the flange for sealing the connection between the base of the cylinder.

2. In an air pump, the combination of a pair of cylinders and a base, the base formed of two sheet metal parts sealed together, the edge of one overlapping the edge of the other, one of the sheet metal parts having openings and depending flanges surrounding the openings, the cylinders having Hattened beads located near the lower ends and flaring edges located at the ends, the flaring edges of the cylinders gripping the corners of the flanges to clench the edges of the flange and to press the flattened beads against the top of the sheet metal part, the cylindrical surfaces below the beads fitting the interior of the flanges, `the other of the sheet metal parts located in proximity to the lower ends of the cylinder to permit air to pass from one cylinder to the other.

1n testimony whereof, 1 have hereunto signed my name to this specification.

SAMUEL A. SNELL.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.