US3927956A - Fluid actuated motor - Google Patents
Fluid actuated motor Download PDFInfo
- Publication number
- US3927956A US3927956A US474624A US47462474A US3927956A US 3927956 A US3927956 A US 3927956A US 474624 A US474624 A US 474624A US 47462474 A US47462474 A US 47462474A US 3927956 A US3927956 A US 3927956A
- Authority
- US
- United States
- Prior art keywords
- casing
- fluid
- cylindrical bore
- bearings
- end caps
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/04—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
- F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F01C1/3442—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
Definitions
- Each of the end plates is formed with a passage extending radially from the axis of the rotor against the face of the -bearing mounted in the recess and outwardly through the periphery of the end plate for the discharge of pressurized fluid into an axially extending passage formed in the side wall of the motor casing.
- the bore of the motor casing, in which the cylinder is mounted is formedwith an annular groove having communication with the axially extending passage. The groove also communicates with an exhaust port formed in the cylinder, and with an exhaust passage formed in the casing.
- This invention relates, in general, to elastic fluid powered motors and more specifically to the construction and lubrication of pneumatic motors.
- Conventional pneumatic motors are constructed with a rotor mounted eccentrically in a circular bore. Movable vanes mounted radially in the rotor extend outward in contact with the inner surface of the bore and provide sealing for the driving fluid. Inlet and exhaust passages are normally provided in the casing containing the bore to allow the driving fluid to enter, drive the rotor, and exhaust from the motor.
- the rotor is usually mounted concentrically in a pair of end plates and end caps and the bore is normally constructed eccentrically of the center line of the main body of the motor.
- One aspect of the present invention eliminates the need for an eccentric bore by providing a motor body with a concentric bore and end caps with bearings mounted eccentrically so that a rotor mounted in the bearings would be in close proximity to one side of the bore.
- FIG. 1 is a lengthwise sectional view of a fluid operated rotary motor embodying my invention, the view being sectioned on line 11, FIG. 2;
- FIG. 3 is a view taken on line 3-3, FIG. 1;
- FIG. 4 is a bottom plan view of the housing looking upwardly in FIGS. 1, 2 and 6;
- FIG. 5 is a side elevational view of the cylinder shell
- FIG. 6 is a sectional view similar to FIG. 2 but taken on a line indicated at line 6-6, FIG. 5;
- FIG. 7 is an enlarged view of the end member and end cap.
- the motor consists of an outer casing 10, substantially rectangular in cross section.
- the side of the casing appearing at the bottom in views 1, 2 and 6 is flat.
- the casing is formed with a pair of inlet passages 11, 12 and an exhaust passage 13 opening through the bottom wall.
- the inlet passages and the exhaust passage are arranged in a straight line in the bottom wall of the casmg..
- the casing isformed with a passage 17 extending from one end of the casing in a direction axially of the casing in the bottom portion thereof.
- the passage 17 communicates with the exhaust passage 13.
- the casing is also formed in its upper side wall with a passage 18 extending inwardly from the right end of the casing and terminating short of the opposite end thereof, see FIG. 1.
- the passages 17, 18 have communication with a circumferentially extending groove 20 formed in the bore of the casing.
- a tubular cylinder shell 23 is positioned in the bore of the casing and has a snug fit therewith and has a length comparable to the length of the casing as shown in the-lower portion of FIG. 1.
- the cylinder shell 23 is shown separated from the housing in FIG. 5.
- the cylinder shell 23 is formed with a pair of circumferentially extending axially spaced apart inlet ports 27 and a similar pair of inlet ports 28.
- the inlet ports 27 have communication with the inlet passage 11, and the inlet ports 28 have communication with the inletpassage 12.
- the cylinder shell 23 is also formed with one or more exhaust ports 30 which have communication with the circumferentially extending groove 20 formed in the bore of the casing.
- Like ends of the inlet ports 27, 28 are circumferentially spaced apart. to provide an intermediate area 35.
- Theopposite ends of the ports 27, 28 are spaced apart, forming an intermediate area 37.
- the intermediate area 35 is somewhat less than while the area 37 extends through an arc of about
- the outlet port 30 is located diametrically opposite to the intermediate cylinder portion 35. i
- a rotor 40 is positioned in the cylinder 23, the diameter of the rotor .being less than the internal diameter of the cylinder shell.
- the rotor is formed with slots 47 disposed radially in the rotor and being spaced equally circumferentially about the rotor.
- a vane 48 is positioned in each of the slots 47. There are five of the vanes 48 movable radially in the slots 47 by centrifugal force so that the outer edges of the vanes engage with the bore 25 of the cylinder 23.
- the rotor 40 is formed at its ends with trunnions 41, 42 journaled in bearings 43, 45.
- the bearings are mounted in bores formed in end caps 50, 51.
- the end caps have circular peripheries 52.
- the bearing bores are offset eccentrically from the peripheries of the end caps, see FIGS. 1 and 7. His results in the rotor 40 running in close proximity to the intermediate portion 35 6f the cylinder shell as 3 shown in the views 2 and 6.
- the end caps 50, 51 are formed with passages 59 in which are mounted dowel or locating pins 54. These pins extend outwardly from the peripheries 52 of the end caps into the notches 33 formed in the ends of the cylinder. These locating pins serve to maintain the end caps properly oriented in the cylinder to effect the close running fit between the rotor and the intermediate portion 35 of the cylinder.
- the end caps 50, 51 are formed with annular flanges 70 concentric with the bores in which the bearings 43, 45 are mounted.
- the bearing bores in the end caps terminate at annular shoulders 57 and these annular shoulders 57 are formed with radial slots 58 communicating with passages 59.
- a spacer ring 60 is mounted on each rotor journal 41, 42. The outer diameter of the spacer ring 60 is less than a bore formed in the inner wall of each end caps so that there isan annular space between the spacer rings and the bore in the end caps.
- the casing is formed with passages 66 which incline outwardly from the ends of the passage 18 and communicate with the area above the outer ends of the pins 54. Accordingly, the leakage fluid passes 'into the passageway 18 into exhaust connecting groove into the passage 17 and out the exhaust passage 13.
- the bearings 43, 45 are provided lubrication and are cooled by the flow of fluid.
- end plates 75, 76 formed with bosses 77 having bores to receivethe annular portion 70 of the end caps 50, 51.
- the end plates 75-76 are attached to the ends of the casing 10 by bolts 85 provided with nuts 86 on the ends thereof as shown in FIG. 1.
- end caps 50, 51 are mounted with a snug fit directly in the ends of the cylinder 23 which effects greater precision in the mounting of the rotor in the cylinder 23.
- the other feature is the passage of operating fluid in contact with the bearings and delivery to the exhaust system of the motor.
- a rotor having radially slidable vanes is eccentrically mounted in a cylindrical bore of a casing, end caps having eccentrically located recesses mounted in each end of the cylindrical bore, bearings mounted in the recesses of the end caps and supporting the rotor, end plates mounted on each end pf the casing, fluid supply ports through the casing in communication with the interior of the cylindrical bore and an exhaust port 4 also communicating with the insides of the cylindrical bore, the improvement comprising:
- a fluid operated rotary motor of the type having a casing and a cylindrical bore within the casing, a rotor having radially slidable vanes is eccentrically mounted in the cylindrical bore of the casing, end caps having eccentrically located recesses are mounted in each end of the cylindrical bore, bearings are mounted in the recesses of the end caps rotatably supporting the rotor, end plates are mounted on each end of the casing, fluid supply ports through the casing are in communication with the interior of the cylindrical bore, and an exhaust port also communicates with the inside of the cylindrical bore, the improvement comprising:
- third fluid passages formed in the casing and communicating with the second fluid passages and the exhaust port, to thereby allow passage of fluid in the cylindrical bore to pass through the bearings to the exhaust port.
- a rotor having radially slidable vanes is eccentrically mounted in a cylindrical bore of a casing, end caps having eccentrically located recesses mounted in each end of the cylindrical bore, bearings mounted in the recesses of the end caps and supporting the rotor, end plates mounted on each end of the casing, fluid supply ports through the casing in communication with the interior of the cylindrical bore, and an exhaust port also communicating with the insides of the cylindrical bore, the improvement comprising:
- end caps means in said end caps to allow passage of fluid containing lubricant from the cylindrical bore to the nieans to allow passage of the fluid from the bearings to the exhaust port whereby lubricant in the fluid supply is deposited on the bearings and the pressure is equalized on both sides of the end caps; and said end caps being positioned relative to the cylindrical bore by means of a locating pin and said means to allow passage of the fluid from the bearings to the exhaust port including a drilled hole in said locating pin for the passage of fluid from the bearing to passages in the casing communicating with the exhaust port.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US474624A US3927956A (en) | 1974-05-30 | 1974-05-30 | Fluid actuated motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US474624A US3927956A (en) | 1974-05-30 | 1974-05-30 | Fluid actuated motor |
Publications (1)
Publication Number | Publication Date |
---|---|
US3927956A true US3927956A (en) | 1975-12-23 |
Family
ID=23884345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US474624A Expired - Lifetime US3927956A (en) | 1974-05-30 | 1974-05-30 | Fluid actuated motor |
Country Status (1)
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US (1) | US3927956A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2489433A1 (en) * | 1980-09-03 | 1982-03-05 | Leybold Heraeus Sogev | ROTARY VACUUM PUMP WITH OIL SEAL |
US4375156A (en) * | 1980-10-03 | 1983-03-01 | Dunham-Bush, Inc. | Closed loop compressed gas system with oil mist lubricated screw compressor |
EP0159968A2 (en) * | 1984-04-24 | 1985-10-30 | CORINT S.r.l. | Pneumatic vane pump with body of stamped sheet-metal |
EP0198247A2 (en) * | 1985-04-15 | 1986-10-22 | Rotorcomp Verdichter GmbH | Rotary compressor |
US5383771A (en) * | 1993-12-20 | 1995-01-24 | Snap-On Incorporated | Air motor with offset front and rear exhausts |
USD408243S (en) * | 1998-02-23 | 1999-04-20 | S.P. Air Kabusiki Kaisha | Pneumatic hand tool |
US6126410A (en) * | 1998-02-12 | 2000-10-03 | Gast Manufacturing Corporation | Head cover assembly for reciprocating compressor |
US6431845B1 (en) | 2000-06-09 | 2002-08-13 | Gast Manufacturing, Inc. | Head cover assembly with monolithic valve plate |
USD499119S1 (en) | 2003-11-05 | 2004-11-30 | Gast Manufacturing Corporation | Compressor |
US20050118050A1 (en) * | 2003-11-28 | 2005-06-02 | Gison Machinery Co., Ltd. | Pneumatic cylinder of pneumatic tool capable of avoiding failure of bearings |
US20070217940A1 (en) * | 2006-02-15 | 2007-09-20 | Pneutech Manufactuer Co., Ltd. | Pneumatic tool with pressure-stabilizing cylinder |
US7354260B1 (en) * | 2007-01-17 | 2008-04-08 | Hsin-Ho Chang | Pneumatic motor including a rotor in a cylinder between two covers in a shell from which air travels into the cylinder through the covers |
US11092011B2 (en) * | 2018-12-03 | 2021-08-17 | Kai Jie Pneumatic Industry Co., Ltd. | Pneumatic motor for pneumatic tools |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US994401A (en) * | 1909-11-15 | 1911-06-06 | Lagonda Mfg Co | Motor. |
US2575524A (en) * | 1946-10-10 | 1951-11-20 | Independent Pneumatic Tool Co | Rotary tool |
US2764941A (en) * | 1953-08-21 | 1956-10-02 | Racine Hydraulics And Machiner | Multiple pump |
US3272138A (en) * | 1964-02-17 | 1966-09-13 | Continental Machines | Variable volume pump with protection against overheating |
US3429230A (en) * | 1966-11-28 | 1969-02-25 | Robert C Quackenbush | Fluid driven motor |
US3826597A (en) * | 1972-10-19 | 1974-07-30 | Drum Eng Co Ltd | Compressor with cartridge assembly |
-
1974
- 1974-05-30 US US474624A patent/US3927956A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US994401A (en) * | 1909-11-15 | 1911-06-06 | Lagonda Mfg Co | Motor. |
US2575524A (en) * | 1946-10-10 | 1951-11-20 | Independent Pneumatic Tool Co | Rotary tool |
US2764941A (en) * | 1953-08-21 | 1956-10-02 | Racine Hydraulics And Machiner | Multiple pump |
US3272138A (en) * | 1964-02-17 | 1966-09-13 | Continental Machines | Variable volume pump with protection against overheating |
US3429230A (en) * | 1966-11-28 | 1969-02-25 | Robert C Quackenbush | Fluid driven motor |
US3826597A (en) * | 1972-10-19 | 1974-07-30 | Drum Eng Co Ltd | Compressor with cartridge assembly |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2489433A1 (en) * | 1980-09-03 | 1982-03-05 | Leybold Heraeus Sogev | ROTARY VACUUM PUMP WITH OIL SEAL |
US4375156A (en) * | 1980-10-03 | 1983-03-01 | Dunham-Bush, Inc. | Closed loop compressed gas system with oil mist lubricated screw compressor |
EP0159968A2 (en) * | 1984-04-24 | 1985-10-30 | CORINT S.r.l. | Pneumatic vane pump with body of stamped sheet-metal |
EP0159968A3 (en) * | 1984-04-24 | 1987-05-13 | CORINT S.r.l. | Pneumatic vane pump with body of stamped sheet-metal |
EP0198247A2 (en) * | 1985-04-15 | 1986-10-22 | Rotorcomp Verdichter GmbH | Rotary compressor |
EP0198247A3 (en) * | 1985-04-15 | 1988-07-13 | Rotorcomp Verdichter GmbH | Rotary compressor |
US5383771A (en) * | 1993-12-20 | 1995-01-24 | Snap-On Incorporated | Air motor with offset front and rear exhausts |
US6126410A (en) * | 1998-02-12 | 2000-10-03 | Gast Manufacturing Corporation | Head cover assembly for reciprocating compressor |
USD408243S (en) * | 1998-02-23 | 1999-04-20 | S.P. Air Kabusiki Kaisha | Pneumatic hand tool |
US6431845B1 (en) | 2000-06-09 | 2002-08-13 | Gast Manufacturing, Inc. | Head cover assembly with monolithic valve plate |
USD499119S1 (en) | 2003-11-05 | 2004-11-30 | Gast Manufacturing Corporation | Compressor |
US20050118050A1 (en) * | 2003-11-28 | 2005-06-02 | Gison Machinery Co., Ltd. | Pneumatic cylinder of pneumatic tool capable of avoiding failure of bearings |
US7029253B2 (en) * | 2003-11-28 | 2006-04-18 | Gison Machinery Co., Ltd. | Pneumatic tool having a pneumatic cylinder for avoiding failure of bearings |
US20070217940A1 (en) * | 2006-02-15 | 2007-09-20 | Pneutech Manufactuer Co., Ltd. | Pneumatic tool with pressure-stabilizing cylinder |
US7354260B1 (en) * | 2007-01-17 | 2008-04-08 | Hsin-Ho Chang | Pneumatic motor including a rotor in a cylinder between two covers in a shell from which air travels into the cylinder through the covers |
US11092011B2 (en) * | 2018-12-03 | 2021-08-17 | Kai Jie Pneumatic Industry Co., Ltd. | Pneumatic motor for pneumatic tools |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: ELLIOTT TURBOMACHINERY CO., INC., A CORP OF DELAWA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO LICENSE RECITED.;ASSIGNOR:CARRIER CORPORATION, A CORP OF DEL.;REEL/FRAME:004499/0922 Effective date: 19851220 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ONE FIRST NAT Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562 Effective date: 19871109 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562 Effective date: 19871109 |
|
AS | Assignment |
Owner name: CONTINENTAL BANK N.A. Free format text: SECURITY INTEREST;ASSIGNOR:ELLIOTT TURBOMACHINERY CO., INC.;REEL/FRAME:005258/0092 Effective date: 19891212 |
|
AS | Assignment |
Owner name: BANK OF NEW YORK, THE, NEW YORK Free format text: ASSIGNMENT OF SECURITY AGREEMENT;ASSIGNOR:BANK OF AMERICA ILLINOIS (F/K/A CONTINENTAL BANK N.A.);REEL/FRAME:008246/0539 Effective date: 19961016 |
|
AS | Assignment |
Owner name: ELLIOTT TURBOMACHINERY COMPANY, INC., PENNSYLVANIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA ILLINOIS (F/K/A CONTINENTAL BANK,N.A.) AS AGENT;REEL/FRAME:008430/0913 Effective date: 19961121 |