US1236651A - Pneumatic pump. - Google Patents

Description

E. L. & J. S. ARNOTT.

PNEUMATIC PUMP. APPLICATION HLED OCT. 22, 1915- Patented A11 14 ,'1917.

' taken on the line 2 2 of Fig. 1

lower member may be extended laterally to EUGENE I. ARNOTT AND JOHN S.

ARNOTT, OF GREENFIELD, OHIO.

PNEUMATIC PUMP.

Application filed October 22 To all whom it may concern:

Be it known that we, EUGENE L. ARNoTr aIlCl'JOHN S. ARNo'rT, citizens of the United States, residing at Greenfield, in the county of Highland and State of Ohio, have invented certain new and useful Improvements in Pneumatic Pumps; and we hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention relates to oil cans of the type in which air pressure is used to force out the liquid through a discharge tube.

The objects of the invention are to provide an air pump of improved construction with means for holding the cloth or dia phragm in position and to prevent the edges thereof which are clamped between metal parts from slipping out, and at the same time to prevent the tin or other metal parts between which the diaphragm is secured from being punctured so as to permit the air to escape.

The invention will first be hereinafter more particularly described, with reference to the accompanying drawings, which are to be taken as a part of thisspecification, and then pointed out in the claims at the end of the description.

In said drawings, Figure 1 is a plan view of a broken-away portion of a pneumatic pump or air compressor adapted to be mounted upon a can or vessel containing the' oil, and by manipulation of the diaphragm to force the oil from the can by atmospheric pressure;

Fig. 2 is a vertical sectional elavation,

Fig. 3 is a detail sectional view illustrating our improved method of securing the edges of the diaphragm between the top and bottom members of the pump chamber.

Referring to said drawings, in which the same reference letters are used to denote corresponding parts in different views, the letters A and B may denote the upper and lower members of the pump chamber, of I dish-like form made of tin or other suitable} metal, and placed one upon the other with their concave sides facing and the marginal portion or "flange of one resting upon a similar marginal portion or flange of the other member. If desired the margin of the :c'orm the top or cover or an oil can, as indi- Specification of Letters Patent.

Patented Aug. 14, 1917. 1915. Serial No. 57,304.

cated in the drawings; or the pump may be secured upon the body' of a can or other vessel of any convenient size or shape, in the manner indicated in our Patent No. 864,284, dated August 27, 1907, for a pneumatic oil can. With the pump chamber, between the members A and B is placed a flexible diaphragm C, in which is fitted a check valve D, adapted to permit the introduction of air on the upward movement of the diaphragm and to force the air into the can through a similar check valve E in the lower member, or top of the can; the pump being provided with an operating lever F, pivotally supported thereon at one end and connected by a rod f with the diaphragm through an opening in the top member A or cover of the pump. The diaphragm C may consist of cloth or other suitable flexible material and is secured in position by having the marginal portions or edges thereof clamped between the edges of the top and bottom members of the pump, as shown more clearly in Figs. 2 and 3; said edges being soldered or otherwise secured together, whereupon a series of indentations a are formed in one marginal flange preferably the margin of the upper member so as to aid in holding the cloth or diaphragm firmly in place and prevent the edges thereof from slipping out. These indentations do not pierce or perforate the tin or material of which the members A and B are formed, for if punctured the air might escape. A series of protuberances are thus formed on one of the clamping members, which will take into without piercing the edges of the cloth and thus firmly bind said edges between the clamping members in such manner as to prevent the escape of air by puncturing the tin or material of which the clamping members are formed.

Having thus described our invention, {what we claim as new and desire to secure by Letters Patent of the United, States is:

1. In a diaphragm pump, a lower casing member of dish-like form having a check valve therein and an integral annular marginal flange, in combination with an upper casing member of like form having a similar annular flange and a central opening,

and a flexible diaphragm placed between and separating said casing members having its marginal portion clamped between the marginal flanges of said casmg members; one of said flanges having impressed thereina series of imperforate indentations which press upon without piercing the material of said diaphragm, whereby the diaphragm is prevented from slipping out from between the flanges while an air-tight connection is formed therebetween; said diaphragm having a check valve therein and an operating lever connected therewith.

2. A diaphragm pump comprisingupper and lower casing members consisting of metallic plates of dish like form having an nular marginal flanges and placed one upon the other with their concave sides facing, the lower member having a check valve therein, a flexible diaphragm placed be tween said plates and having its marginal portion clamped between said flanges; said diaphragm having a check valvetherein and one of said flanges having impressed therein a series of protuberances which press upon without piercing the material of said diaphragm, whereby the latter is prevented from slipping out from between said flanges while an air-tight connection is formed therebetween, an operating lever pivotally mounted on the upper casing member, and a rod conne'ctingsaid lever and said diaphragm through an opening in the upper casing member, substantially as described.

Intestimony that we claim the foregoing as our own, we aflix our signatures in presence of two witnesses.

' EUGENE L. ARNOTT.

JOHN S. ARNOTT. Witnesses:

GHAs. MoAL'r; PEARL BORDENL Copies of this patent may be obtained for five cents each, by addressing the Commissioner of'latents,

Washington; D. G.

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