US595745A - Rotary pump - Google Patents

Description

"'(Ne Model.)

K 2 Sheets-r-S'hP-et 1. B. P. TABPR. y

- ROTARY PUMP.

155.595,745. I' Patented Dee. 2,1, v159;?.

UNITED STATES PATENT OFFICE.

BENJAMIN F. TABER, OF BUFFALO, NEW YORK.

ROTARY PU M P.

SPECIFICATION forming part of Letters Patent No. 595,745, dated December 21, 1897.

Application filed December 10, 1895. Serial No. 571,637. (No model.)

To all whom it may concern.'

Beit known that I, BENJAMIN F. TABER, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Rotary Pumps, of which the following is a specification.

This invention relates to that class of rotary pumps which comprise, essentially, a hemispherical case or shell having an oblique head, a conical diaphragm mounted on the horizontal driving-shaft of the pump and running with its conical face in contact with the plane inner surface of the oblique head, and a semicircular piston oscillating in a diametrical slot of the conical diaphragm and bearing with its plane edge against the oblique head of the case.

One of the objects of my invention is to provide the pump with efcient means for constantly keeping the oscillating piston and the conical diaphragm in snug contact with the oblique head of the case, so as to take up the wear of these parts automatically and prevent leakage of the liquid past the same.

The invention has the additional objects to so construct the pump that its head can be removed for obtaining access to the interior thereof without disturbing other parts of the lpump and to render the piston readily removable from the conical head or diaphragm.

In the accompanying drawings, consisting of two sheets, Figure l is a longitudinal sectional elevation of a rotary pump embodying. Fig. 2 is a sectional topl my improvements. plan view of the pump,l the plane of the sectional portion being in line 2 2, Fig; l. Fig.

3 is a transverse section 'in line 3 3, Fig. 1.

Fig.. 4 is a detached perspective view of the conical diaphragm and the driving-shaft. Fig. 5 is a similar view of the coupling-sleeve.

Fig. 6 is a transverse section in line 6 6, Fig.

1, on an enlarged scale.

Like letters of reference refer to like parts in the several figures.

A represents the stationary frame of the pump, having standards A A2 at opposite ends thereof, and B is the hemispherical case 0r shell supported on the front standard A' and preferably cast in one piece therewith. The open front side of the case is formed with the usual inclined face or Iiange b, towhich is secured the oblique head C.

D D represent the inlet and discharge ports or passages arranged in the upper portion of the shell, on opposite sides thereof, and separated by a partition D2. These passages are preferably formed wholly in the case, and the branches or hollow enlargements D3, which form the same, are provided with the usual flanges for the attachment of the pipes or conduits, which latter do not appear in the drawings.

E is the rotary conical head or diaphragm arranged within the hemispherical case and bearing with its conical face against the abutment formed by the upper portion of the 0blique head O in a well-known manner.

F is the horizontal driving-shaft upon which the conical diaphragm is mounted and which is supported at its front end in a bearing G, arranged on the outer side of the oblique head O, while its rear portion passes through a stufling-box I-I, arranged on the rear side of the case. The shaft extends rearwardly7 beyond this stufngbox,and its rear end is supported in a bearing I, arranged at the upper end of the frame-standard A2.

J J are tight and loose pulleys mounted side by side on the rear portion of the drivingshaft. The shaft is free to slide lengthwise in its bearings to a limited extent.

' K is a spring arranged in the rear shaft-bearing I and exerting a constant pressure against the rear end of the driving-shaft, thereby holding the conical diaphragm in yielding contact with the plane inner face of the oblique head O and insuring at all times a tight joint between these parts. The spring K is preferably interposed between washers or followers la' k2, which bear, respectively, against the rear end of thedriving-shaft and the inner end of an adjusting-screw k3, arranged in a screw-threaded opening formed in the closed rear end of the bearing I. By means of this set-screw the tension of the spring may be properly regulated. This spring serves not only to maintain a close joint between the conical diaphragm and the oblique head 'and to compensate for the wear of the diaphragm, but also permits the diaphragm to yield in case a hard object, such as a nail, enters be- IOO tween it and the oblique head, thereby preventing injury to the parts.

L is the oscillating piston or valve, which is arranged in a diametrical slot formed in the conical diaphragm in the customary manner. This piston is of the usual semicircular form and is pivoted at the middle of its plane or straight edge upon a transverse pivot-pin Z, which is carried by a longitudinally-sliding sleeve M, surrounding the front portion of the driving-shaft, as shown iu Figs. l, 2, and 3. The pivot-pin Z is preferably provided with a thimble or bushing Z. The adjacent portion of the shaft is formed with a longitudinal slot Z2, through which the pivot-pin Z and its bushing pass.

n is a longitudinally-movable rod or bolt arranged in a socket or cavity n', formed in the outerportion of the driving-shaft and sliding in an opening` formed in the inner end of said socket. This bolt is secured at its inner end to a sliding block o, which moves in a longitudinal slot o', formed in the adjacent portion of the shaft and with which the sliding sleeve M is connected by a transverse pin o2, passing through the block and the sleeve, as shown in Fig. l, whereby the sliding movement of the bolt is transmitted to the sleeve.

p is a spring surrounding the sliding bolt n, between the head of the latter and the bottom of the socket n', and tending constantly to draw said bolt outwardly. This outward movement of the sliding bolt is transmitted through the block o to the coupling-sleeve M and through the latter to the pivot Z of the oseillatin g piston, thereby drawing the straight edge of the piston against the opposing plane face of the oblique head C and holding the piston in close contact with said head. The spring p thus compensates for any wear of the piston, wherebya tight joint is always insured between the same and the oblique head and at the same time permits the piston to yield in the event of any hard substance entering between it and the oblique head, thus avoiding injury to these parts. This construction also allows the diaphragm to recede from the head ofthe ease for clearing obstructions without withdrawing the piston from contact with the head, thereby preventing interruption of the suction of the pump.

The coupling-sleeve M is provided in its inner portion with longitudinal slots m, as shown in Figs. l and 5, which permit the requisite play of the oscillating piston. The outer end of the front bearing G is closed by a stuffing-box or gland Q.

By arranging the spring of the piston on the outer side of the head of the pump-case and providing the bearing carried by the head with a gland or stuffing-box access can be conveniently had to the spring for renewing it when worn out by simply removing the gland, thus avoiding the necessity of removing the head of the case for this purpose.

R is a packing-block arranged in the lon gitudinal slot o' ot' the driving-shaft and having a concave face r, which bears against a convex or semicircular knuckle fr', formed on the oscillating piston adjacent to its pivot-pin Z and projecting beyond the straight edge of the piston. This packing-block is held in yielding contact with the knuckle of the piston by springs s, interposed between its rear side and the opposing front side of the slidingnblock o. The packing-block forms a tight joint with the knuckle of the piston, which prevents leakage of the pumped liquid from the delivery to the receiving side of the case and from the case into the outer or front shaftbearing.

In the operation of the pump the piston is oscillated in the conical diaphragm by the rotation of the latter and the contact of the straight edge of the piston with the oblique head of the case, which causes the wings of the piston to be alternately projected and retracted in a well-known manner.

By arranging the main portion of the driving-shaft F and the tight and loose pulleys J J on the rear side of the pump-case and forming the inlet and outlet branches of the pump wholly in th e case, as shown, the oblique head of the ease can be readily removed without disturbing the shaft and pulleys and the pipes connected with said bran ches. This construction also permits the removal of the piston from the conical diaphragm without removing the latter from the case, it being only necessary for this purpose to drive the pivot-pin Z of the piston out of the couplingsleeve M after removing the oblique head from the case, when the piston can be withdrawn from the slot of the diaphragm for repairing or renewing it.

The interior of the casing is preferably cut away from the lower ends of the inlet and outlet passages to the partition D2, as shown in Fig. 3, so as to aford an ample discharge for the liquid. The casing is cut away in this manner adjacent to both passages, as these passages are used interchangeably-- that is, either as the inlet or the outlet of the pump.

I claim as my inventionl. In a rotary pump, the combination with a hemispherical case having an oblique head, and a conical diaphragm arranged in the case and carrying an oscillating piston, of a rotary shaft carrying said diaphragm, at its front end and having its rear end journaled in a bearing arranged in rear of said case and a spring arranged in said bearing and operating against the rear end of said shaft, substantially as set forth.

2. In a rotary pump, the combination with the hemispherical case having an oblique head and the rotary conical diaphragm arranged in said case and bearing with its conical surface against said head, of a longitudinally-inevable driving-shaft carrying said diaphragm, a spring tending to force said shaft and diaphragln forwardly, an oscillating piston capable of sliding in said diaphragm toward and TOO lIO

from the oblique head of the case, and a spring which tends to move said piston against said oblique head, substantially as set forth.

3. In a rotary pump, the combination with a hemispherical case, of an oblique head closing the front end of the case and having on its outer side a bearing Which is provided at its outer end With a gland or stuffing-box, a

Irotary conical diaphragm arranged in the case case having an oblique head and the rotary conical diaphragm arranged in the case, of

' an oscillating piston arranged in a slot or re-l cess of the diaphragm and capable of sliding in the diaphragm toward and from the oblique head of the case, a spring arranged in the front side of said oblique head, and a longitudinally-movable coupling connecting the pivot of the oscillating piston with said spring, substantially as set forth.

5. The combination with the hemispherical case having an oblique head and the rotary conical diaphragm arranged in the case, of an oscillating piston arranged in a slot or recess of the diaphragm and capable of sliding in the diaphragm toward and from the oblique head of the case, a sleeve carrying the pivot of said piston and capable of sliding lengthwise on the shaft of the diaphragm, and a spring-bolt sliding on said shaft and connected With said sleeve, substantially as set forth.

6. The combination with the hemispherical 4o.

case having an oblique head and the rotary conical diaphragm arranged in the case, of an oscillating piston arranged in a slot or recess of the diaphragm and capable of sliding in the diaphragm toward and from the oblique head of the case, a sleeve carrying the pivot of said piston at its inner end and capable of sliding on the shaft of the diaphragm, a block attached to the outer end of said sleeve, a sliding bolt arranged in a socket in the outer 5o end of said shaft and connected with the block of said sleeve, and a spring surrounding said sliding bolt between its head and the bottom of said socket, substantially as set forth.

7. The combination With the hemispherical 5 5 case having an oblique head and the rotary conical diaphragm arranged in the case, of a driving-shaft carrying said diaphragm and provided on the front side of the diaphragm with a longitudinal slot, an oscillating piston 6o arranged in a recess of said diaphragm and provided on the front side of its pivot With a convex knuckle, and a yielding packing-block arranged in the slot of the driving-shaft and bearing against said knuckle, substantially as set forth.

Witness myhand this 18th day of November, 1895.

BENJAMIN F. TABER. Witnesses: v

KATHRYN ELMoRE, JNO. J. BONNER.

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