US3650639A - Air pumps - Google Patents
Air pumps Download PDFInfo
- Publication number
- US3650639A US3650639A US4615A US3650639DA US3650639A US 3650639 A US3650639 A US 3650639A US 4615 A US4615 A US 4615A US 3650639D A US3650639D A US 3650639DA US 3650639 A US3650639 A US 3650639A
- Authority
- US
- United States
- Prior art keywords
- air
- pump
- chamber
- motor
- pumping chamber
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/066—Cooling by ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/045—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like pumping flexible members
Definitions
- a dampening or mufflmg arrangement 15 provided 417/368 413 415 479 480 which substantially reduces the air borne operational noise of the pumps.
- AIR PUMPS This invention relates in general to air pumps and in particular to new and improved air cooled vacuum pumps and compressors.
- a common type of pump for pumping a compressible gas such as air to a captive system is a diaphragm and piston pump.
- a reciprocating diaphragm and piston positively displace the gas from a cylinder'during the discharge stroke of the piston.
- these pumps are of small capacity and are generally single acting and air cooled.
- the diaphragms and pistons are usually moved reciprocatingly by a cam, crankshaft and cam follower connecting rod mechanism, or the equivalent, deriving motion from a driving source such as an electric motor. On being compressed, the gas is expelled through valves which open readily upon slight differential pressures.
- the term air pump is used generically hereinafter to describe these and other gas compressors, vacuum pumps, and the like.
- air-cooled fluid pumps have employed heatradiating fins cast integral with the pump body to furnish additional radiating surface to carry off the heat of compression.
- the use of these cooling fins has been successful only to a degree in providing a solution to the heat disposal problem.
- these fins have not provided sufficient cooling of the units to adequately extend the cycle life of the diaphragms in the pumps. Consequently, the diaphragms have worn out too quickly resulting in costly maintenance problems and substantially reduced efficiency of the pump unit.
- an object of the present invention is to provide new and improved air pumps.
- an object is to provide air cooled vacuum pumps and compressors which overcome the problem of disposal of the heat of compression.
- a related object is to provide air cooled air pumps of the diaphragm type which are more efficient in operation, require less time consuming and costly maintenance and wherein the diaphragm component thereof has a substantially extended cycle life.
- Another object is to provide air compressors which are substantially quieter in operation. More specifically, an object is to provide air compressors having noise dampening or muffler means to reduce the air borne noise level of the unit.
- a motor operated, air cooled pump having a movable pump member comprising a piston and diaphragm assembly.
- the pump member is arranged to move in an undulating reciprocal motion within a pumping chamber to produce compressed air.
- Ducts are provided to allow cool air to enter the pump body and cool the pumping chamber. After cooling the pumping chamber and, correspondingly, the piston and diaphragm therein, this air is drawn, by a fan operatively connected to the motor, through channels in the pump body over the motor, thus providing a cooling effect for the motor. The air is then expelled from the pump through outlet vents provided in the pump body.
- FIG. 1 is a pictorial representation of the inventive air pump in the form of an air compressor
- FIG. 2 is a cross-sectional side view of the air compressor taken along line 2 2 of FIG. 1;
- FIG. 3 is a sectional view of the piston and connector rod assembly in the air compressor of FIG. 1 showing the cavity in the body of the piston with the cellular material therein;
- FIG. 4 is a schematic stop action representation showing the operation of the air compressor of FIG. 1 during the suction stroke and discharge stroke of the pumping member;
- FIG. 5 is a sectional view of a vacuum pump head assembly replacing the air compressor cylinder head assembly shown in the encircled area 5 of FIG. 3;
- FIG. 6 is a schematic stop action representation showing the operation of a vacuum pump, employing the vacuum pump head assembly of FIG. 5, during the suction stroke and discharge stroke of the pumping member.
- FIG. 1 pictorial representation of a preferred embodiment of the invention, an air compressor assembly 10 is shown.
- the assembly includes a housing or casing 12, a front cover plate 14, a rear rotor housing 16 and a cylinder head 18. These constituent parts are securably fastened together to form the assembly 10 by any suitable arrangement such as screws, bolts and the like.
- the assembly 10 of the present embodiment is constructed for use as a portable unit.
- a mounting position 20 is provided for an adjustable handle (not shown) so that the assembly 10 can be easily transported.
- the assembly 10 can also be mounted in a stationary positioned, if desired.
- Fins 21 are provided about the outer surface of the assembly 10.
- Means are provided for cooling a cylinder or pumping chamber 22 in the housing 12 by providing a flow of cool air about the outer surface thereof whereby the heat of compression generated within the cylinder 22 is effectively and efficiently dissipated.
- a plurality of ducts or ports such as duct 24, are positioned about the surface of the head 18 to provide inlets for entry of cool air into the housing 12.
- the ducts 24 in head 18 communicate with channels or passageways 26 in housing 12 and form continuous paths with these channels or passageways 26.
- air flows into the assembly 10 through ducts 24.
- the cool air then circulates about the outer surface of the cylinder 22 in the housing 12 through the channels or passageways 26.
- Corresponding paths are further provided through the fan scroll cavity 17 in the motor end cover plate 16 so that a continuous flow path is provided from the inlet ducts 24 through the entire pump body including housing 12 and rotor housing 16 to outlet vents 28.
- Means are further provided for cooling a motor 30 in the assembly 10 by the passage of cooling air thereover. More particularly, additional cool air inlet ports 32 are provided through the base of the housing 12. These ports 32 connect with channels 26 in the housing 12. The air entering these ports 32 combines with the air flowing in channels 26 which entered through ducts 24. This combined air flow enhances cooling of the motor bearings and windings of the motor 30 as the air passes over the motor 30 and through the motor end cover plate 16 before being expelled through outlet vents 28. This cooling of the motor 30 and the motor bearings promotes extended bearing life and substantially increases the motor ef-.
- the fan 34 is operatively connected to the motor 30 and acts to draw air into the assembly through ducts 24 and ports 32 and causes this air to circulate through the channels or passageways 26 provided in the assembly 10. Additionally, the fan 34 forces the air out of the assembly 10 through outlet vents 28 after the air has completed its flow path through the pump body.
- the air compressor 10 is operated by a motor 30 such as an electrically driven motor mounted in a space provided in the housing 12 and motor end cover plate 16.
- the motor 30 is operatively attached to the fan 34 in the motor end cover plate 16 by a shaft 36 and bearings 38.
- a shaft 40 extends from the opposite end of the motor 30 and is connected to a connecting rod assembly 42 which extends in a vertical plane perpendicular to the axis of the shaft 40.
- This connection is made in any suitable manner such as by bearings 43 and 44 and a cam or eccentric 46 to impart motion to the rod 42.
- the motion thus attained can be characterized generally as reciprocal motion in a plane parallel to the axis of the shaft 40 and as a slight rocking or undulating motion in a plane perpendicular to this axis.
- the upper end of the rod 42 is flared outwardly to form a piston-like member 48 which is disposed within a pump cylinder or chamber 50 in the housing 12.
- a cavity or chamber 52 defined by shell 54 is provided within the piston body 48 as shown in FIG. 3.
- the cavity 52 is open at the top and is covered by a cover plate 56.
- the cover plate 56 is attached to piston 48 by cover plate screws 55.
- An outlet opening or port 57 is provided in cover plate 56 and is positioned to correspond with the central area of cavity 52.
- the port 57 is enclosed at its upper end by a suitable valve mechanism 58, such as a feather valve, a reed valve and the like.
- Holes 60 are provided through the base of the shell 54 to allow air to enter therein.
- Means such as cellular material 62 are provided for reducing the noise caused by the operation of the valves during the compression and exhaust cycles of the compressor 10. More specifically, the cavity 52 contains a cellular material or substance 62 which has a characteristic property, a high loss of energy due to its internal working responsive to mechanical vibrations. Exemplary of suitable cellular materials having these properties are certain soft plastics, elastomers, cellulose, expanded rubber and the like. In operation, air enters cavity 52 through holes 60 and then passes through the cellular material 62 having the high internal loss properties before it is expelled from the cavity 52 through outlet opening 57 and valve 58.
- the sound waves are damped or muffled to a high degree due to the acoustical impedance by the cellular material 62 having inefficient vibration transmission characteristics.
- This dampening or muffiing effect on the sound waves results in substantially reduced air borne noise level and, thus, quieter valve operation.
- the cavity 52 with material 62 forms a noise dampening chamber or muffler which reduces the air borne valve noise and thus provides a quieter operating pump.
- An annular shaped flexible diaphragm 64 is secured to the upper face of the piston 48 by the cover plate or retainer 56 and screws 55.
- the outer periphery of the diaphragm 64 is clamped in sealing engagement between the outer end of the cylinder 50 and the cylinder head 18.
- the cylinder head 18 is bolted to the outer end of the cylinder 50.
- the cylinder head 18 includes an inverted cuplike body 68 closed on the inner end by an exhaust or valve plate 70.
- a compression chamber 72 is thus formed between the cover plate 56 and the exhaust plate 70.
- a central outlet opening or port 74 extends through exhaust plate 70 and terminates in communication with the compression chamber 72.
- the outlet opening 74 is enclosed at the top by a suitable valve mechanism 76 such as a feather valve, a reed valve and the like to interconnect chamber 72 with a high pressure chamber 78.
- a discharge port 80 interconnects the high pressure chamber 78 to a suitable outlet conduit 82 for transfer of the compressed air directly to a compressed air load.
- the front cover plate 14 is provided with an inlet port 84 to allow air to enter the compressor assembly 10.
- the port 84 is abutted by a removable filter material 85 such as porous felt and the like.
- the perforated metal plate 86 retains filter material 85.
- This filter material 85 filters the air entering the unit through port 84 to eliminate any undesirable contaminants before the air enters the cavity 52 of the piston 48 through the holes 60 in the shell 54 and, subsequently, the compression chamber 72.
- FIGS. 4(a), 4(b), 4(c), and 4(d) The operation of the compressor 10 is depicted in the schematic stop action illustrations, FIGS. 4(a), 4(b), 4(c), and 4(d).
- the piston 48 continues its upward discharge stroke (FIG. 40) and the pressure of the air trapped in the compression chamber 72 increases due to the compressive action of piston 48 thereon.
- the pressure of the air in chamber 72 continues to mount until a point is reached at which the pressure differential between the compression chamber 72 and the high pressure chamber 78 is such that the valve 76 opens. Then the compressed air passes through outlet opening 74 from the compression chamber 72 into the high pressure chamber 78 and hence through discharge port 80 into the outlet conduit 82.
- the inventive air pumps are vacuum pumps.
- the structure and operation of the vacuum pumps generally is similar to that heretofore described with reference to air compressors in FIGS. 1-4.
- the housing 12, the front cover plate 14 and the rear rotor housing 16 and the constituent elements therein are the same as above described.
- the encircled area 5 in FIG. 2 comprising cylinder head 18 of compressor 10 is replaced by a vacuum pump head 88 shown in FIG. 5.
- the vacuum pump head 88 includes an inverted cuplike body 90 with a centrally positioned ridge 92.
- the body 90 is closed on the inner end by a valve plate 94.
- the bottom end of ridge 92 is sealed with plate 94 forming two discrete chambers 96 and 98 in body 90.
- Chamber 96 is an inlet chamber and chamber 98 is a discharge chamber.
- a compression chamber similar to chamber 72 of compressor 10 is formed between the valve plate 94 and a cover plate such as cover plate 56 in housing 12 shown in FIGS. 23.
- An inlet opening or port 100 and an exhaust opening or port 102 are provided in plate 94.
- the inlet opening 100 interconnects inlet chamber 96 with compression chamber 72 and, likewise, exhaust opening 102 interconnects compression chamber 72 with discharge chamber 98.
- Inlet opening 100 is enclosed at the bottom within chamber 72 by a suitable valve mechanism 104 and exhaust opening 102 is enclosed at the top within discharge chamber 98 by a similar type valve mechanism 106.
- Suitable valve mechanisms 104 and 106 include feather valves, reed valves and the like.
- the valves 104 and 106 are held in position by valve screws 108 and valve keepers 1 10.
- An inlet port 112 interconnects a suitable inlet conduit 1 14 to the inlet chamber 96 for introduction of air into the head 88. This air subsequently passes through opening 100 in plate 94 into compression chamber 72. After compression, the compressed air is expelled from the pump head 88 through opening 102 in plate 94 and discharge chamber 98 into a discharge port 116.
- the discharge port 116 interconnects the dischargechamber 98 to a suitable outlet conduit 1 l8 and the compressed air is thereby transferred directly to a compressed air load.
- FIGS. 6(a), 6(b), 6(0), and 6(d) The operation of the vacuum pump is depicted in the schematic stop action illustrations, FIGS. 6(a), 6(b), 6(0), and 6(d).
- FIGS. 6(a), 6(b), 6(0), and 6(d) During the suction stroke (FIG. 6a) of the piston 48, when the piston 48 and diaphragm 64 move downwardly, air from inlet conduit 114 enters inlet chamber 96 through inlet port 112.
- the valve 104 enclosing opening 100 in valve plate 94 opens due to the differential pressure between inlet chamber 96 and compression chamber 72. This allows the air to flow into compression chamber 72.
- the piston 48 continues its upward discharge stroke (FIG. 60) and the pressure of the air trapped in the compression chamber 72 increases due to the compressive action of piston 48 thereon.
- the pressure of the air in chamber 72 continues to mount until a point is reached at which the pressure differential between the compression chamber 72 and the discharge chamber 98 is such that the valve 106 opens. Then the compressed air passes through exhaust opening 102 from the compression chamber 72 into the discharge chamber 98 and hence through discharge port 116 into outlet conduit 118.
- valve 106 closes thus returning the unit to its approximate starting condition wherein valves 104 and 106 are closed.
- a motor operated air cooled pump including a pump body having disposed therein a pumping chamber, said pumping chamber having a movable pump member disposed therein, said pump member operating with a suction stroke to draw air from a first air inlet means through a first air duct channel means into said pumping chamber and a discharge stroke to compress said air and to expel the compressed air from said pump chamber through a first air outlet means, second air inlet and outlet means separate from said first air inlet and outlet means, said second air inlet and outlet means being positioned about the surface of said pump body, said second air inlet means being connected to said second air outlet means by second air duct channel means separate from said first air duct channel means, said second air duct channel means extending through said pump body in a manner such that said second channel means extend in sequence from said second air inlet means around the outer surface of said pumping chamber over the surface of said motor and then to said second air outlet means, means for drawing cool air into said pump body through said second air inlet means and for drawing said air through said second channel means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US461570A | 1970-01-21 | 1970-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3650639A true US3650639A (en) | 1972-03-21 |
Family
ID=21711629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US4615A Expired - Lifetime US3650639A (en) | 1970-01-21 | 1970-01-21 | Air pumps |
Country Status (2)
Country | Link |
---|---|
US (1) | US3650639A (en) |
FR (1) | FR2075793A5 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3776666A (en) * | 1972-02-18 | 1973-12-04 | Deknatel Inc | Portable pump |
US3877842A (en) * | 1970-01-21 | 1975-04-15 | Itt | Air pumps |
US3981631A (en) * | 1974-01-16 | 1976-09-21 | Gast Manufacturing Corporation | Compressor head construction |
US4070133A (en) * | 1976-02-09 | 1978-01-24 | Mccormick Homer | Pump compressor unit for use with pumping draft beer |
US20030024956A1 (en) * | 2001-08-02 | 2003-02-06 | Gary Crawford | Confetti, theatrical snow, and fog launching mechanism and system |
US6629827B2 (en) * | 2001-08-24 | 2003-10-07 | John Chou | Small size air compressor |
US20060039813A1 (en) * | 2004-08-19 | 2006-02-23 | Thomas Paul J | Domed cover for pump head |
US20070005336A1 (en) * | 2005-03-16 | 2007-01-04 | Pathiyal Krishna K | Handheld electronic device with reduced keyboard and associated method of providing improved disambiguation |
US20090285697A1 (en) * | 2008-05-19 | 2009-11-19 | Sorensen Duane A | High Pressure Air Pump |
US8167591B1 (en) * | 2008-05-19 | 2012-05-01 | Sorensen Duane A | High pressure air pump with reciprocating drive |
US20130108423A1 (en) * | 2011-11-02 | 2013-05-02 | Yamabiko Corporation | Air-blow working machine |
US20130199526A1 (en) * | 2010-06-25 | 2013-08-08 | Davide Fraccaroli | Aerosol therapy device |
US20180066638A1 (en) * | 2015-02-18 | 2018-03-08 | Carlisle Fluid Technologies, Inc. | High pressure pump |
US20220018343A1 (en) * | 2020-07-15 | 2022-01-20 | Wen-San Chou | Air inflator device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1183129A (en) * | 1910-04-07 | 1916-05-16 | James H Bell | Portable pneumatic pumping apparatus. |
US1187031A (en) * | 1915-06-04 | 1916-06-13 | Samuel D Black | Air-compressor. |
US2042510A (en) * | 1933-12-01 | 1936-06-02 | Richard T Cornelius | Motor pump unit |
US2285215A (en) * | 1939-06-08 | 1942-06-02 | Binks Mfg Co | Fluid compressor |
-
1970
- 1970-01-21 US US4615A patent/US3650639A/en not_active Expired - Lifetime
-
1971
- 1971-01-21 FR FR7101927A patent/FR2075793A5/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1183129A (en) * | 1910-04-07 | 1916-05-16 | James H Bell | Portable pneumatic pumping apparatus. |
US1187031A (en) * | 1915-06-04 | 1916-06-13 | Samuel D Black | Air-compressor. |
US2042510A (en) * | 1933-12-01 | 1936-06-02 | Richard T Cornelius | Motor pump unit |
US2285215A (en) * | 1939-06-08 | 1942-06-02 | Binks Mfg Co | Fluid compressor |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877842A (en) * | 1970-01-21 | 1975-04-15 | Itt | Air pumps |
US3776666A (en) * | 1972-02-18 | 1973-12-04 | Deknatel Inc | Portable pump |
US3981631A (en) * | 1974-01-16 | 1976-09-21 | Gast Manufacturing Corporation | Compressor head construction |
US4070133A (en) * | 1976-02-09 | 1978-01-24 | Mccormick Homer | Pump compressor unit for use with pumping draft beer |
US20030024956A1 (en) * | 2001-08-02 | 2003-02-06 | Gary Crawford | Confetti, theatrical snow, and fog launching mechanism and system |
US6629827B2 (en) * | 2001-08-24 | 2003-10-07 | John Chou | Small size air compressor |
US20060039813A1 (en) * | 2004-08-19 | 2006-02-23 | Thomas Paul J | Domed cover for pump head |
US20070005336A1 (en) * | 2005-03-16 | 2007-01-04 | Pathiyal Krishna K | Handheld electronic device with reduced keyboard and associated method of providing improved disambiguation |
US20090285697A1 (en) * | 2008-05-19 | 2009-11-19 | Sorensen Duane A | High Pressure Air Pump |
US8047818B2 (en) * | 2008-05-19 | 2011-11-01 | Sorensen Duane A | High pressure, multiple-stage air pump with valve body inlet port arrangement |
US8167591B1 (en) * | 2008-05-19 | 2012-05-01 | Sorensen Duane A | High pressure air pump with reciprocating drive |
US20130199526A1 (en) * | 2010-06-25 | 2013-08-08 | Davide Fraccaroli | Aerosol therapy device |
US20130108423A1 (en) * | 2011-11-02 | 2013-05-02 | Yamabiko Corporation | Air-blow working machine |
US9206567B2 (en) * | 2011-11-02 | 2015-12-08 | Yamabiko Corporation | Air-blow working machine |
US20180066638A1 (en) * | 2015-02-18 | 2018-03-08 | Carlisle Fluid Technologies, Inc. | High pressure pump |
US10968900B2 (en) * | 2015-02-18 | 2021-04-06 | Carlisle Fluid Technologies, Inc. | High pressure pump |
US20220018343A1 (en) * | 2020-07-15 | 2022-01-20 | Wen-San Chou | Air inflator device |
Also Published As
Publication number | Publication date |
---|---|
FR2075793A5 (en) | 1971-10-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ITT CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606 Effective date: 19831122 |
|
AS | Assignment |
Owner name: TI PNEUMOTIVE, INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FL INDUSTRIES, INC.;REEL/FRAME:004909/0224 Effective date: 19880623 Owner name: FL INDUSTRIES, INC.,NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ITT CORPORATION;REEL/FRAME:004909/0222 Effective date: 19880616 Owner name: TI PNEUMOTIVE, INC., A CORP. OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FL INDUSTRIES, INC.;REEL/FRAME:004909/0224 Effective date: 19880623 Owner name: FL INDUSTRIES, INC., 220 SOUTH ORANGE AVENUE, LIVI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ITT CORPORATION;REEL/FRAME:004909/0222 Effective date: 19880616 |