US587907A - Piston for rotary pumps - Google Patents

Piston for rotary pumps Download PDF

Info

Publication number
US587907A
US587907A US587907DA US587907A US 587907 A US587907 A US 587907A US 587907D A US587907D A US 587907DA US 587907 A US587907 A US 587907A
Authority
US
United States
Prior art keywords
piston
section
rotary pumps
outline
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US587907A publication Critical patent/US587907A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084Toothed wheels

Description

(No Model.)

W L AMES & T GRAY PISTON FOR ROTARY PUMPS, BLOWERS, &c.

No. 587,907. Patented Aug. 10,1897.

71 12172656 5. J/ZMM 7 UNITED STATES PATENT OFFICE.

WILLIAM L. AMES AND THOMAS GRAY, OF TERRE HAUTE, INDIANA.

PISTON FOR ROTARY PUMPS, BLOWERS, 800.

SPECIFICATION forming part of Letters Patent No. 587,907, dated August 10, 1897. Application filed July 8, 1893. Serial No. 479,976. on model.)

T0 ail whom it may concern:

Be it known that we, WILLIAM L. AMES, a citizen of the United States, and THOMAS GRAY, a subject of the Queen of Great Britain, residing at Terre Haute, in the county of Vigo and State of Indiana, have invented certain new and useful Forms of Pistons or Revolvers for Rotary Pumps, Blowers, Gas-Exhausters, Meters, and the Like, of which the following is a specification. p

The object of our invention is to provide pistons of the class mentioned which have such an outline of cross-section, taken at right angles to the axis of rotation, that they may either be made with greater accuracy or with less labor than the pistons now in use for such purposes, or that the form of cross-section may be adapted to specific purposes, or that either one or all these advantages may be obtained. We accomplish these results by making use of odontoidal surfaces, so arranged as to form a working surface for a rotary piston, which'under proper conditions is coacting with another piston the working surface of which has a like form.

By odontoidal surfaces we wish to be understood as meaning surfaces of such contour that when they have their axes of rotation in proper position and are rotated about these axes with proper and uniform angular velocities they will keep in perfect contact continuously throughout the extent of the coacting pairs of surfaces.v Our method of arrangement and construction of these surfaces is illustrated in the accompanying drawing,

which represents the cross-section of a pair of pistons, the section-outline being generated by rolling outside and inside the pitchcircle a closed curve of unequal diameters.

Describing our invention more fully by aid of the drawing, the outline of the piston-section is generated in like manner to that of the continuous epicycloidal outline generated by alternately rolling a'circle on the inside and outside of the pitch-line, but differs therefrom in that the rolling or generating curve is not a circle, but has unequal diameters.

As a particular case the drawing represents a section-outline 35 36, generated by rolling on the pitch-circle an ellipse Z, having its perimeter equal to one-fourth that of the pitch-circle and (in this case) having the describing point at the end of the major axis. When a piston of this outline is used in conjunction with a piston of like outline, perfect contact is kept up throughout a complete revolution.

By properly selecting the describing point (which may be any point of the rolling curve) the outline of the section may be varied to suit certain particular applications. For example, by taking the describing point at the end of the major axis of the ellipsealong and relatively thin section is obtained,thus adapting the pump to a larger capacity for low pressures. By taking the describing point at the endof the minor axis ashort and broad section is obtained which may be made to swell around the shaft, thus permitting the use of a large shaft and adapting the pump to high pressures.

Although we have used the ellipse as a particular case of rolling or generating curve for describing our invention, we do not confine ourselves to the use of the ellipse, but may use any other suitable closed curve excepting the circle.

Having fully described our invention, what we claim, and desire to secure by Letters iatent, is

Rotary pistons having as section-outlines odontoidal curves generated by rolling outside and inside the pitch-circle-a closed curve having unequal diameters-and having a periphery equal to one-fourth that of the pitchcircle, substantially as described.

WM. L. AMES. THOMAS GRAY;

Witnesses:

' P. NIELSEN,

EDWIN FAUST.

US587907D Piston for rotary pumps Expired - Lifetime US587907A (en)

Publications (1)

Publication Number Publication Date
US587907A true US587907A (en) 1897-08-10

Family

ID=2656574

Family Applications (1)

Application Number Title Priority Date Filing Date
US587907D Expired - Lifetime US587907A (en) Piston for rotary pumps

Country Status (1)

Country Link
US (1) US587907A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050011A (en) * 1959-05-20 1962-08-21 Karl Martin Rotary pump
US3089638A (en) * 1958-12-01 1963-05-14 Dresser Ind Impellers for fluid handling apparatus of the rotary positive displacement type
US4975032A (en) * 1987-07-07 1990-12-04 Fuji Jukogyo Kabushiki Kaisha Roots type blower having reduced gap between rotors for increasing efficiency
US20050051168A1 (en) * 2003-08-04 2005-03-10 Devries Douglas F. Portable ventilator system
US20050112013A1 (en) * 2003-08-04 2005-05-26 Pulmonetic Systems, Inc. Method and apparatus for reducing noise in a roots-type blower
US20060249153A1 (en) * 2003-08-04 2006-11-09 Pulmonetic Systems, Inc. Mechanical ventilation system utilizing bias valve
US7527053B2 (en) 2003-08-04 2009-05-05 Cardinal Health 203, Inc. Method and apparatus for attenuating compressor noise
US7607437B2 (en) 2003-08-04 2009-10-27 Cardinal Health 203, Inc. Compressor control system and method for a portable ventilator
US7997885B2 (en) 2007-12-03 2011-08-16 Carefusion 303, Inc. Roots-type blower reduced acoustic signature method and apparatus
US8156937B2 (en) 2003-08-04 2012-04-17 Carefusion 203, Inc. Portable ventilator system
US8888711B2 (en) 2008-04-08 2014-11-18 Carefusion 203, Inc. Flow sensor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089638A (en) * 1958-12-01 1963-05-14 Dresser Ind Impellers for fluid handling apparatus of the rotary positive displacement type
US3050011A (en) * 1959-05-20 1962-08-21 Karl Martin Rotary pump
US4975032A (en) * 1987-07-07 1990-12-04 Fuji Jukogyo Kabushiki Kaisha Roots type blower having reduced gap between rotors for increasing efficiency
US8677995B2 (en) 2003-08-04 2014-03-25 Carefusion 203, Inc. Compressor control system for a portable ventilator
US20050112013A1 (en) * 2003-08-04 2005-05-26 Pulmonetic Systems, Inc. Method and apparatus for reducing noise in a roots-type blower
US20060249153A1 (en) * 2003-08-04 2006-11-09 Pulmonetic Systems, Inc. Mechanical ventilation system utilizing bias valve
US7188621B2 (en) 2003-08-04 2007-03-13 Pulmonetic Systems, Inc. Portable ventilator system
US7527053B2 (en) 2003-08-04 2009-05-05 Cardinal Health 203, Inc. Method and apparatus for attenuating compressor noise
US7607437B2 (en) 2003-08-04 2009-10-27 Cardinal Health 203, Inc. Compressor control system and method for a portable ventilator
US9126002B2 (en) 2003-08-04 2015-09-08 Carefusion 203, Inc. Mechanical ventilation system utilizing bias valve
US8118024B2 (en) 2003-08-04 2012-02-21 Carefusion 203, Inc. Mechanical ventilation system utilizing bias valve
US20050051168A1 (en) * 2003-08-04 2005-03-10 Devries Douglas F. Portable ventilator system
US8297279B2 (en) 2003-08-04 2012-10-30 Carefusion 203, Inc. Portable ventilator system
US8683997B2 (en) 2003-08-04 2014-04-01 Carefusion 203, Inc. Portable ventilator system
US8627819B2 (en) 2003-08-04 2014-01-14 Carefusion 203, Inc. Portable ventilator system
US8156937B2 (en) 2003-08-04 2012-04-17 Carefusion 203, Inc. Portable ventilator system
US10118011B2 (en) 2003-08-04 2018-11-06 Carefusion 203, Inc. Mechanical ventilation system utilizing bias valve
US8522780B2 (en) 2004-05-18 2013-09-03 Carefusion 203, Inc. Portable ventilator system
US7997885B2 (en) 2007-12-03 2011-08-16 Carefusion 303, Inc. Roots-type blower reduced acoustic signature method and apparatus
US8888711B2 (en) 2008-04-08 2014-11-18 Carefusion 203, Inc. Flow sensor
US9375166B2 (en) 2008-04-08 2016-06-28 Carefusion 203, Inc. Flow sensor
US9713438B2 (en) 2008-04-08 2017-07-25 Carefusion 203, Inc. Flow sensor

Similar Documents

Publication Publication Date Title
Shir et al. Lubrication of a porous bearing—Reynolds’ solution
US2733854A (en) chang
US5368451A (en) Metering pump
US2527536A (en) Rotary screw pump
US1495526A (en) Rotary prime mover, motor, compressor, pump, and the like
GB1244797A (en) Improvements in gear pumps or motors
US207871A (en) Improvement in elastic packings for pistons
US2764101A (en) Helical pump
US1069408A (en) Method and apparatus for producing high vacuums.
US1789842A (en) Pump or compressor
US3822972A (en) Multistart helical rotor mechanism
US852033A (en) Motor.
US618272A (en) johnson
US405559A (en) For shafts
US1736822A (en) Piston mechanism for engines and pumps
US1287026A (en) Hydraulic pump.
US2988003A (en) Pump construction
US139499A (en) Improvement in mechanical movements
US2428181A (en) Rotary gear pump
US922049A (en) Hub construction for grindstones.
US3286642A (en) Hydraulic balancing device in screw pumps
US1352107A (en) Pump or compressor
US171651A (en) Improvement in rotary pumps
US593248A (en) Carriage or cycle motor
US771864A (en) Mechanical movement.