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Publication numberUS1927617 A
Publication typeGrant
Publication dateSep 19, 1933
Filing dateJan 6, 1931
Priority dateJan 15, 1930
Publication numberUS 1927617 A, US 1927617A, US-A-1927617, US1927617 A, US1927617A
InventorsRudolf Schmidt
Original AssigneeRudolf Schmidt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Piston engine or piston pump
US 1927617 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Sept, 19,1933, RSCHMIDT 1,927,617

PISTON ENGINE OR PISTON PUMP Filed Jan. 6, 1951 I" a I v a r (\V I y v .ANvEn/fO/Q 7 ?uooLF Scrlw/zor A-r'r DRIVE f3 Patented Sept. 19, 1933 I v I I UNITED STATES PATENT. OFFlCE PISTON ENGINE OR PISTON PUMP Rudolf Schmidt, Vienna, Austria Application January s, 1931, Serial No. 506,926, and in Austria January 15,. 1930 9 Claims. (01. 103-150) I have filed an application in Austria on Janface and from a radial bending stress produced uary 15,1930. by deformation and pressure, and further by This invention relates to piston engines (piston stretching of the base of the corrugations and pumps) having a casing, provided with an inlet inclining the latter. From these strains can be 5 valve and an outlet valve and a piston reciprofound by theory the shape of the corrugations 6 cating within the said casing. The object of for the smallest tension and at the greatest bendthe invention is the arrangement of an annular ing of the lamination. Annular laminations elastic diaphragm of undulated sheet metal, constructed in this way allow comparatively long clamped at its inner circumference to the outer strokes from A to 1 centimetre even in case'ot wall of the piston and at its outer circumfera. very small width of the annulus (in a prac- 6 ence to the inner wall of the casing. tical construction for instance 40 millimetres).

One mode of carrying out the invention is Figs. 4a-4g show various forms of the diaillustrated by way of example on the accomphragm. panying sheet of drawing in which Figs. 1 and 2 The diaphragm illustrated by Fig. 4a is formed.

' 1 are two vertical sectional views, the sections bewith ring shaped corrugations and with a wavy 7 ing taken at planes which are vertically disposed line as cross section, with amplitudes, having to each other. Fig. 3 is a detail view and Figs. the maximum M between the inner diameter d:- 4a to 4g show some constructions of the diaand'the middle diameter dm nearer to the latter phragm. and gradually decreasing to zero towards the The piston 1 reciprocating in. the casing inner diameter d; and towards the outer diam- 7 2, of the engine forms a working chamber 3 eter do. of the diaphragm ring. which is provided with an inlet valve 3 and an The diaphragm illustrated by Fig. 4b is formed outlet valve 3. The piston is packed by a with ring shaped corrugations and with a wavy diaphragm 4 with respect to the parts 2 and 5 line as cross section, with amplitudes, having the of the casing. A crank mechanism, comprismaximum M between the inner and the middle 3 ing a piston rod 6, a springy connecting rod '7 diameter nearer to the latter and decreasing little provided at its end with the crank-pin hearing or not towards the outer diameter. 8, serves for driving the reciprocating piston 1. .The diagram illustrated by Fig. 4c is formed- 30 The flywheel 10 is fixed to the crank-shaft 9 with ring shaped corrugations and with a wavy and carries a rubber-ring 11, which co-operates line as cross section, with amplitudes, having the 8 as a friction wheel with a friction roller 12, maximum in the middle diameter and gradually mounted on the shaft of a driving motor 13, decreasing to zero towards the inner and tohinged at 14 to the casing, and pressed down wards the outer diameter of the diaphragm ring.

by its weight or by suitable auxiliary weights G. The diaphragm illustrated by Fig. 4d is formed The common diaphragm pumps are adapted with ring shaped corrugations and with'a wavy 9 for very little pressures having very small'strokes. line as cross section, with amplitudes, having the According to the present invention diaphragms maximum in the middle diameter and decreasing are used, which are adapted for great differences little or not towards the outer diameter but de- 6 of pressures. For this purpose the annular dia-v creasing to zero towards the inner diameter.

phragm 4 is provided with ring shaped corru- A plurality of superposed diaphragms are em- 9 gations and is of such size that, in view of the ployed if it is desired to further reduce the thickdetormation, corresponding to the piston-stroke, ness or the several sheets and .to increase the the bending stress does not amount to more but stroke. In case of compression, one diaphragm 46 also not to much less than. the halt of the stress sheet rests on the other, so that the strain is disto which the material is subjected. The ,deeper tributed to all diaphragms. Either all diacorrugations are forced from the clamping zones, phragms are fixed to the casing and piston and where the greatest bending moments of presprevented from rubbing on one another by insure and deformation are present, towards the terposed lubricants, or only the first diaphragm 50 middle where no bending moment is present, beis fully clamped in order to close the working cause the radial stresses additionally subject to chamber, while the other diaphragmsare gradu- 1 bending the base of the corrugations. The ex: ally shortened towards the zone or the greatest act shape of the corrugations results from the bending stress by reducing their outer diameter,

fact that, incase of an even plate, the tension similarly to the several plates of a plate-spring,

, results at every point from a circumferential 'used for instance as a vehicle-spring (Fig. 3).

bendingstressproducedbythecwvature otthe Inordertoattainthe rreatestpossiblestroke of the diaphragm at a given thickness of the sheet metal, according to Figs. 4c, 4f and 49 the diaphragm is formed with ring shaped corrugations a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the outerwall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations' and with a wavy line as cross section, with amplitudes, having the maximum between the inner and the middle diameter nearer to the latter and gradually decreasing to zero towards the inner and towards the outer diameter of the diaphragm ring.

- 2. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its' inner circumference to the outer wall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations and with a wavy line as cross section, with amplitudes having the maximum between the inner and the middle diameter nearer to the latter and decreasing little or not towards the outer diameter.

3. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an an nular elastic diaphragm clamped in a fluidtight manner at its inner circumference to the outer wall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations and with a wavy line as cross section, with amplitudes, having the maximum in the middle, diameter and gradually decreasing to 'zero towards the inner and towards the outer diameter of the diaphragm ring.

4. In a pump comprising a casing having an inlet valve and an outlet valve and provided with apiston reciprocating within the casing, anannular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the .outer wall of the piston and at its outer circumference to the inner wall of' the casing, said diaphragm being formed withring shaped corrugations and I "with a wavy line as cross section with amplitudes, having the maximum in the middle dimeter and decreasing little or not towards the manner at its inner circumference to the outerwall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations and with a wavy line as cross section, the corrugations having a curved or wavy middle line. I

6. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the outer wall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations and with a wavy line as cross section, the corrugations having a curved or wavy middle line and being arranged symmetrically with respect to this middle. line.

7. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the outer wall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations, and with a wavy line as cross section, and composed o a plurality of superposed plates.

8. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the outer wall of the piston and at its outer circumference to the inner wall of the casing, the said diaphragm being formed with ring shaped corrugations, and

with a wavy line as cross section, and composed of a plurality of superposed .plates, becoming gradually'shorter in the manner of a plate spring.

9. In a pump comprising a casing having an inlet valve and an outlet valve and provided with a piston reciprocating within the casing, an annular elastic diaphragm clamped in a fluid tight manner at its inner circumference to the outer sec wall of the piston and at its outer circumference

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2567637 *Jan 21, 1948Sep 11, 1951Hartford Nat Bank & Trust CoHot gas piston apparatus with flexible crank coupling
US2607322 *Apr 26, 1946Aug 19, 1952Little Inc AExpansion engine
US2751935 *Dec 13, 1954Jun 26, 1956Cutler Hammer IncDiaphragm elements
US3262335 *Feb 27, 1964Jul 26, 1966Bosch Gmbh RobertConnecting rod transmissions for compressors and the like
US4632082 *Dec 2, 1985Dec 30, 1986Toyota Jidosha Kabushiki KaishaDevice for driving a rotary valve
US4753578 *Nov 26, 1986Jun 28, 1988Morrison Donald RAbrasive fluid pumping apparatus
US5607292 *Jul 19, 1995Mar 4, 1997Rao; Dantam K.Electromagnetic disk pump
US6327960Jan 19, 2000Dec 11, 2001Lewa Herbert Ott Gmbh & Co.Diaphragm pump with a hydraulically driven diaphragm
DE2916847C2 *Apr 26, 1979Dec 16, 1982Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen, DeTitle not available
EP1022465A2 *Jan 18, 2000Jul 26, 2000LEWA Herbert Ott GmbH + Co.Hydraulically driven diaphragm pump
WO2006058801A1 *Sep 16, 2005Jun 8, 2006Bosch Gmbh RobertDiaphragm pump and diaphragm for a diaphragm pump
Classifications
U.S. Classification417/571, 92/84, 92/100, 92/153, 92/104, 74/581, 92/103.00M, 74/18.2, 417/413.1
International ClassificationF16J3/02, F04B43/02, F04B43/00, F04B9/02, F16J3/00
Cooperative ClassificationF04B43/02, F04B9/02, F04B43/0054, F16J3/02
European ClassificationF04B9/02, F16J3/02, F04B43/00D8, F04B43/02