USRE34301E - Fluid operable engine - Google Patents
Fluid operable engine Download PDFInfo
- Publication number
- USRE34301E USRE34301E US07/756,629 US75662991A USRE34301E US RE34301 E USRE34301 E US RE34301E US 75662991 A US75662991 A US 75662991A US RE34301 E USRE34301 E US RE34301E
- Authority
- US
- United States
- Prior art keywords
- piston
- cylinder
- engine
- opening
- wall
- 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
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
Definitions
- THIS INVENTION relates to a fluid operable engine. More particularly, the engine may be pneumatically or hydraulically operable. Further, the engine is of the type which provides reciprocating motion.
- a fluid operable engine which includes
- a cylinder defining member which has walls to define a cylinder that is closed at opposed first and second ends
- a piston that is within the cylinder and is slidable therein, the piston having opposed first and second ends;
- a first set of orifices comprising a first opening defined in the first end of the piston and a second opening defined in the second end of the piston;
- a second set of orifices comprising a first aperture defined in a wall of the cylinder defining member at its first end and a second aperture defined in a wall of the cylinder defining member at its second end,
- a cyclically operable closure means for alternately closing the orifices of a selected one of the sets of orifices
- a communication means for establishing fluid communication through the piston between the exterior of the cylinder and the first and second openings; and a force and movement transferring means for transferring forces exerted on the piston and movement thereof relative to the cylinder defining member to the exterior of the cylinder.
- the cylinder defining member may have first and second cylinder end walls and the apertures may be in these end walls.
- the cylinder defining member may also have a cylindrical wall and the apertures may be in this wall close to its ends.
- the piston may similarly have end walls in which the openings are defined.
- the engine may be operated in either a positive supply or a negative supply manner.
- the engine in a positive supply manner, the engine may be supplied with a fluid that is at a pressure greater than ambient, and in a negative supply manner, the engine may be connected to a suction device which causes the pressure to be less than ambient.
- a positive or a negative supply device is used to drive the engine, it can be connected to either the exterior of the cylinder defining means or to the communication means.
- the piston divides the cylinder into a first and a second chamber.
- the first end walls of the cylinder defining member and the piston may be adjacent one another so that the first chamber is between these walls, with the second chamber being between the second end walls. It will then be understood that the engine operates by creating a cyclic pressure differential between the two chambers which causes the piston to move back-and-forth in the cylinder.
- the communication means may include a tube which extends from the second end wall of the piston through the second end wall of the cylinder defining member, to be slidable therethrough, in a relatively fluid tight manner.
- a seal may be provided between the tube and the second end wall of the cylinder defining member.
- the piston may be hollow to define an interior chamber which communicates with the interior of the tube and the openings. Instead, the piston may have suitable passages extending between the tube and the openings.
- the force and movement transferring means may be a rigid element which is fast with and extends from the second end wall of the piston through the second end wall of the cylinder defining member to be slidable therein in a relatively fluid tight manner.
- the tube may be sufficiently strong and rigid to perform this function.
- the openings will be smaller than the apertures or vise-versa depending on whether the engine is being operated in a positive or negative supply manner, and whether the source of power is connected to the outside of the cylinder defining member or to the communication means.
- closure means may close the openings from inside the piston or from outside; or close the apertures from within the cylinder or from without.
- closure means may comprise one closure member or two.
- The, or each, closure member may be displaced into and out of closing engagement with an opening or aperture by fluid forces, by a mechanical arrangement or in any other suitable manner.
- a side seal may be provided between the piston and cylinder cylindrical walls.
- An end seal may also be provided between the first piston and cylinder end walls and between the second piston and cylinder end walls. These seals may be flexible and frusto-conical so that a closed space is formed which decreases in volume, as the piston approaches each end of the cylinder, which communicates with the appropriate opening.
- FIG. 1 shows a schematic view of a first embodiment of an engine in accordance with the invention, that operates in a positive supply manner;
- FIG. 2 shows schematically a variation of the closure means of the engine of FIG. 1;
- FIG. 3 shows schematically a further embodiment of an engine in accordance with the invention, that operates in a negative supply manner
- FIG. 4 shows a longitudinally sectioned view of a further embodiment of an engine in accordance with the invention, that is similar to the embodiment of FIG. 1;
- FIG. 5 shows a variation of the engine shown in FIG. 4.
- FIG. 6 shows a schematic sectioned view of a still further embodiment of an engine in accordance with the invention.
- a fluid operable engine in accordance with the invention is designated generally by reference numeral 10.
- the engine 10 has a cylinder defining member 12 which has a circular cylindrical wall 14, a first end wall 16 and a second end wall 18.
- a first aperture 20 is defined in the end wall 16 and a second aperture 22 is defined in the second end wall 18.
- Both the first end wall 16 and the second end wall 18 have a central, circular, inwardly projecting ridge 24.
- the cylindrical wall 14 and the end walls 16 and 18 define a cylinder.
- a hollow piston 26 is located within the cylinder and is slidable therein.
- the piston 26 also comprises a cylindrical wall 28 and first and second end walls 30 and 32 to define an interior chamber 33.
- a first opening 34 is defined in the end wall 30 and a second opening 36 is defined in the end wall 32.
- a ball 38 is within the piston and it closes either the opening 34 or the opening 36, seats 40 and 42 being provided to promote sealing.
- "0"-ring seals 44 which are the same size as the ridges 24, are mounted on the outer surfaces of the end walls 30 and 32, in alignment with the ridges 24, to be engageable therewith. It will be noted that the openings 34 and 36 are surrounded by the seals 44. It will further be noted that the apertures 20 and 22 are substantially smaller than the openings 34 and 36.
- the engine 10 has a rigid tube 46 which is fast at one end with the end wall 32, so that the interior of the tube 46 is in communication with the interior chamber 33 of the piston 26 and is slidable therewith.
- the tube 46 passes through a hole in the end wall 22 with a seal 48 being provided.
- piston 26 divides the interior of the cylinder into two variable volume chambers 50 and 52.
- water under pressure is supplied to the engine 10 from a suitable source, which is connected to the free end of the tube 46.
- the water flows through the tube 46 into the piston 26 and out through one of the apertures 34 or 36.
- the ball 38 will close one of the apertures 34 or 36.
- water will exit through the aperture 34 into the chamber 50.
- Some of the water will exit through the opening 20.
- the pressure of the water in the chamber 50 will be greater than the pressure in the chamber 52 and accordingly the piston 26 will be displaced from left to right.
- FIG. 2 of the drawings a part of a further embodiment 54 of the engine is shown.
- the embodiment 54 is similar to the embodiment 10 shown in FIG. 1, except that a mechanically operable closure means is provided for closing either the opening 34 or the opening 36.
- This embodiment 54 is otherwise numbered in a similar manner to the embodiment 10.
- this embodiment 54 has a valve member 56 which is located within the piston 26.
- the valve member 56 has a stem 58 with spaced stoppers 60 and 62. When the stopper 60 is in engagement about the opening 34 to close it, the stopper 62 is spaced from the opening 36 so that fluid can flow therethrough, and vice versa.
- a first lever arm 64 is pivotally mounted at one end to a post 66 and its other free end 68 is engageable with the stoppers 60 and 62 to displace them into engagement with the end walls 30 and 32 respectively to close the openings 34 and 36 respectively.
- a second lever arm 70 is also pivotally mounted at one end to the post 66. Its other end 72 is located between two rings 74 that are fast with a plunger 76 that projects through both the end walls 30 and 32. The free ends of the lever arms 64 and 72 are connected by means of a spring 78. With the arrangement as shown in FIG. 2, if the piston 26 is moving towards the end wall 16, ie.
- the plunger 76 will engage the end wall 16 and be displaced downwardly, with reference to FIG. 2. This will cause pivoting of the lever arm 70 and, when the spring 78 moves past the pivotal axis of the arms 64 and 70, the arm 64 will be caused to pivot, thereby displacing the valve member 56 so that the opening 36 is closed.
- the plunger 76 will now project from the end wall 32 so that when the end wall 18 (not shown in FIG. 2) is reached the plunger 76 will be displaced in the opposite direction, causing pivoting of the lever arm 64 back to the position shown in FIG. 2 so that the opening 34 is closed.
- FIG. 3 a further embodiment of an engine in accordance with the invention is designated generally by the reference numeral 80.
- This embodiment 80 is similar to the embodiment 10 of FIG. 1 and is similarly referenced. However, this embodiment 80 operates in a negative pressure manner so that it has a valve member 82 with a stem 84 carrying two opposed stoppers 86 and 88 that are outside the piston 26 and the piston has passageways such as passage 87. It will be appreciated, that if the valve member 82 is in the position shown in FIG. 3, and suction is applied to the free end of the tube 46, that the piston 26 will move from left to right as shown by the arrow 90. When the spring 102 reaches the end wall 22 it will begin to compress.
- a further embodiment of an engine in accordance with the invention is designated generally by reference numeral 110.
- This embodiment 110 is similar to the embodiment 10 shown in FIG. 1 and is similarly referenced. Its operation is also similar to that of the embodiment 10 of FIG. 1.
- the piston 26 is formed in two parts that are held together by means of posts 118.
- This embodiment 110 further has two seals, each having a side sealing portion 114 and an end sealing portion 112 with the end sealing portions 112 engaging the ridges 24 on the end walls 16 and 18.
- the two parts that form the piston 26 have sidewall portions 128 which do not meet with the seals being received therein and being held in place by a holding ring 116.
- the cylindrical wall of the piston 26 is defined by the sidewalls 128, the seals and the ring 116.
- FIG. 5 a still further embodiment 120 is shown.
- This embodiment is also similar to the embodiments 10 and 110 of FIGS. 1 and 4 respectively and is similarly referenced.
- This embodiment 120 does not have the ridges 24 and instead has two frusto-conical end seals 122. The wider ends of these seals 122 are held in grooves in the end walls 30 and 32.
- the seals 122 surround the openings 34 and 36. It will be appreciated that as the piston 26 moves into engagement with the end walls 16 and 18 the seals 122 collapse and the auxiliary chambers defined thereby have a fairly large change in volume, as compared with the ridge and seal arrangements shown in FIGS. 1 and 4.
- FIG. 6 a still further embodiment of an engine in accordance with the invention is designated by reference numeral 130.
- This embodiment 130 is also operated in a positive supply manner. However, water under pressure is supplied to the outside of the cylinder 12, rather than to the inside of the piston 26 via the tube 46.
- a casing 132 is provided around a part of the outside of the cylinder defining member 12 so that the apertures 20 and 22 are in communication with a port 134 to which the water under pressure is supplied.
- the apertures 20 and 22 are closed from outside by means of stoppers 140 and 142 on a valve 136.
- the valve 136 has a shaft 138 which extends between the stoppers 140 and 142 and passes through the piston 26 via openings 34 and 36 in the end walls 30 and 32 respectively.
- the valve 136 also has collars 144 and 146 close to the stoppers 140 and 142 respectively which are engaged by the piston 26, to displace the valve 136 back-and-forth.
- the apertures 20 and 22 are greater than the openings 34 and 36.
- the embodiment 130 can be operated in a negative supply manner, with a suction being supplied to the port 134.
- an engine is provided that is cheap to manufacture, is reliable and compact, and which responds automatically to resistive forces.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Catching Or Destruction (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA87/9089 | 1987-12-03 | ||
ZA879089 | 1987-12-03 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/280,232 Reissue US4949622A (en) | 1987-12-03 | 1988-12-05 | Fluid operable engine |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE34301E true USRE34301E (en) | 1993-07-06 |
Family
ID=25579085
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/280,232 Ceased US4949622A (en) | 1987-12-03 | 1988-12-05 | Fluid operable engine |
US07/756,629 Expired - Lifetime USRE34301E (en) | 1987-12-03 | 1991-09-09 | Fluid operable engine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/280,232 Ceased US4949622A (en) | 1987-12-03 | 1988-12-05 | Fluid operable engine |
Country Status (6)
Country | Link |
---|---|
US (2) | US4949622A (en) |
EP (1) | EP0319341B1 (en) |
AT (1) | ATE72877T1 (en) |
AU (1) | AU610303B2 (en) |
CA (1) | CA1335166C (en) |
DE (1) | DE3868597D1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6299413B1 (en) * | 2000-06-14 | 2001-10-09 | Ingersoll-Rand Company | Pump having a bleeding valve |
US6553863B1 (en) | 1999-04-21 | 2003-04-29 | Atoma International Corp. | Accelerator pedal |
US20030116203A1 (en) * | 2001-11-30 | 2003-06-26 | H-Tech, Inc | Swimming pool cleaning apparatus and parts therefor |
US6589027B2 (en) * | 2000-08-21 | 2003-07-08 | Westport Research Inc. | Double acting reciprocating motor with uni-directional fluid flow |
US20050279682A1 (en) * | 2001-11-30 | 2005-12-22 | Davidson Donald R | Debris bag for a swimming pool cleaning apparatus |
US20080155975A1 (en) * | 2006-12-28 | 2008-07-03 | Caterpillar Inc. | Hydraulic system with energy recovery |
US20090089944A1 (en) * | 2001-11-30 | 2009-04-09 | Ronald Griffin | Fluid Distribution System for a Swimming Pool Cleaning Apparatus |
US20090218416A1 (en) * | 2006-03-06 | 2009-09-03 | Takahiro Ohashi | Water Discharger |
US20100059604A1 (en) * | 2006-03-02 | 2010-03-11 | Toto Ltd. | Shower apparatus |
US9745767B2 (en) | 2013-03-15 | 2017-08-29 | Hayward Industries, Inc. | Swimming pool pressure cleaner including automatic timing mechanism |
US9845609B2 (en) | 2013-03-15 | 2017-12-19 | Hayward Industries, Inc. | Swimming pool pressure cleaner including automatic timing mechanism |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH705193A1 (en) * | 2011-06-22 | 2012-12-31 | Medmix Systems Ag | Apparatus for bubble poor mixing and dispensing a product. |
DE102011119371B3 (en) * | 2011-11-25 | 2013-04-04 | Heraeus Medical Gmbh | Device for mixing bone cement |
DE102011119377B3 (en) | 2011-11-25 | 2013-04-04 | Heraeus Medical Gmbh | Storage and mixing device for bone cement |
FR3031134B1 (en) * | 2014-12-26 | 2018-02-16 | Exel Industries | COMPRESSED AIR MOTOR AND PUMP COMPRISING SUCH AN ENGINE |
RU205274U1 (en) * | 2021-04-20 | 2021-07-06 | Михаил Николаевич Баютин | ENGINE PNEUMATIC |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE289758C (en) * | ||||
DE10284C (en) * | H. ZORN in Berlin, Neuenburgerstrafse 16 | .Petroleum steam burner with heat transferring sieves and double bottom to keep the petroleum basin cool | ||
DE118621C (en) * | ||||
US2545506A (en) * | 1945-10-17 | 1951-03-20 | Raymond A Walsh | Pump |
DE879338C (en) * | 1950-06-18 | 1953-06-11 | Toussaint & Hess Gmbh | Flywheelless air motor, especially for driving high pressure pumps for hydraulic systems on trucks and their trailers |
US2727467A (en) * | 1951-04-24 | 1955-12-20 | Russell Carl Dexter | Sub-surface pumping units |
US2780171A (en) * | 1954-05-20 | 1957-02-05 | Edward H Heddy | Pneumatically activated well pump |
US2862478A (en) * | 1956-06-11 | 1958-12-02 | F E Myers And Bro Company | Fluid motor piston |
US3390616A (en) * | 1965-10-19 | 1968-07-02 | William L. Hammer | Fluid pressure cylinders having load responsive piston valves |
GB1144268A (en) * | 1966-09-07 | 1969-03-05 | Paschke Hanns Dieter | Fluid operated apparatus for producing reciprocatory movement |
GB1348800A (en) * | 1970-07-30 | 1974-03-20 | Basf Ag | Production of adipic acid |
US3937241A (en) * | 1973-11-29 | 1976-02-10 | Philippe Cloup | Device for injecting an adjuvant into a liquid |
DE2532712A1 (en) * | 1974-08-08 | 1976-02-19 | Sig Schweiz Industrieges | PNEUMATICALLY ACTUATED IMPACT DEVICE |
US3960058A (en) * | 1973-12-12 | 1976-06-01 | Hans Berkelius | Device at hydraulic motor |
US4127057A (en) * | 1975-11-07 | 1978-11-28 | Paul Stubenruss | Reciprocating fluid stroke motors with automatic control |
US4258609A (en) * | 1977-10-11 | 1981-03-31 | Conway John P | Dual speed hydraulic piston assembly |
FR2508568A1 (en) * | 1981-06-30 | 1982-12-31 | Valiorgue Bernard | Double-acting fluid control and distribution ram - has hollow piston rod and has distribution valves mounted within cylinder |
SU1000617A1 (en) * | 1981-06-30 | 1983-02-28 | Предприятие П/Я Р-6266 | Self-reversing pneumatic-hydraulic drive |
US4807321A (en) * | 1986-12-16 | 1989-02-28 | Giorgio Grasselli | Air cleaning system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191020674A (en) * | 1910-09-05 | 1911-02-16 | George Clenso Kaitting | A New or Improved Water Motor. |
US1348800A (en) * | 1919-02-06 | 1920-08-03 | Jesse N Hipkins | Water-motor |
-
1988
- 1988-12-05 EP EP88311484A patent/EP0319341B1/en not_active Expired - Lifetime
- 1988-12-05 AT AT88311484T patent/ATE72877T1/en not_active IP Right Cessation
- 1988-12-05 AU AU26556/88A patent/AU610303B2/en not_active Expired
- 1988-12-05 US US07/280,232 patent/US4949622A/en not_active Ceased
- 1988-12-05 CA CA000585028A patent/CA1335166C/en not_active Expired - Lifetime
- 1988-12-05 DE DE8888311484T patent/DE3868597D1/en not_active Expired - Lifetime
-
1991
- 1991-09-09 US US07/756,629 patent/USRE34301E/en not_active Expired - Lifetime
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE289758C (en) * | ||||
DE10284C (en) * | H. ZORN in Berlin, Neuenburgerstrafse 16 | .Petroleum steam burner with heat transferring sieves and double bottom to keep the petroleum basin cool | ||
DE118621C (en) * | ||||
US2545506A (en) * | 1945-10-17 | 1951-03-20 | Raymond A Walsh | Pump |
DE879338C (en) * | 1950-06-18 | 1953-06-11 | Toussaint & Hess Gmbh | Flywheelless air motor, especially for driving high pressure pumps for hydraulic systems on trucks and their trailers |
US2727467A (en) * | 1951-04-24 | 1955-12-20 | Russell Carl Dexter | Sub-surface pumping units |
US2780171A (en) * | 1954-05-20 | 1957-02-05 | Edward H Heddy | Pneumatically activated well pump |
US2862478A (en) * | 1956-06-11 | 1958-12-02 | F E Myers And Bro Company | Fluid motor piston |
US3390616A (en) * | 1965-10-19 | 1968-07-02 | William L. Hammer | Fluid pressure cylinders having load responsive piston valves |
GB1144268A (en) * | 1966-09-07 | 1969-03-05 | Paschke Hanns Dieter | Fluid operated apparatus for producing reciprocatory movement |
GB1348800A (en) * | 1970-07-30 | 1974-03-20 | Basf Ag | Production of adipic acid |
US3937241A (en) * | 1973-11-29 | 1976-02-10 | Philippe Cloup | Device for injecting an adjuvant into a liquid |
US3960058A (en) * | 1973-12-12 | 1976-06-01 | Hans Berkelius | Device at hydraulic motor |
DE2532712A1 (en) * | 1974-08-08 | 1976-02-19 | Sig Schweiz Industrieges | PNEUMATICALLY ACTUATED IMPACT DEVICE |
US4127057A (en) * | 1975-11-07 | 1978-11-28 | Paul Stubenruss | Reciprocating fluid stroke motors with automatic control |
US4258609A (en) * | 1977-10-11 | 1981-03-31 | Conway John P | Dual speed hydraulic piston assembly |
FR2508568A1 (en) * | 1981-06-30 | 1982-12-31 | Valiorgue Bernard | Double-acting fluid control and distribution ram - has hollow piston rod and has distribution valves mounted within cylinder |
SU1000617A1 (en) * | 1981-06-30 | 1983-02-28 | Предприятие П/Я Р-6266 | Self-reversing pneumatic-hydraulic drive |
US4807321A (en) * | 1986-12-16 | 1989-02-28 | Giorgio Grasselli | Air cleaning system |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6553863B1 (en) | 1999-04-21 | 2003-04-29 | Atoma International Corp. | Accelerator pedal |
US6299413B1 (en) * | 2000-06-14 | 2001-10-09 | Ingersoll-Rand Company | Pump having a bleeding valve |
US6589027B2 (en) * | 2000-08-21 | 2003-07-08 | Westport Research Inc. | Double acting reciprocating motor with uni-directional fluid flow |
US20030116203A1 (en) * | 2001-11-30 | 2003-06-26 | H-Tech, Inc | Swimming pool cleaning apparatus and parts therefor |
US20050279682A1 (en) * | 2001-11-30 | 2005-12-22 | Davidson Donald R | Debris bag for a swimming pool cleaning apparatus |
US7318448B2 (en) | 2001-11-30 | 2008-01-15 | H-Tech, Inc. | Swimming pool cleaning apparatus and parts therefor |
US7677268B2 (en) | 2001-11-30 | 2010-03-16 | Hayward Industries, Inc. | Fluid distribution system for a swimming pool cleaning apparatus |
US20080202997A1 (en) * | 2001-11-30 | 2008-08-28 | Davidson Donald R | Debris bag for a swimming pool cleaning apparatus |
US20090089944A1 (en) * | 2001-11-30 | 2009-04-09 | Ronald Griffin | Fluid Distribution System for a Swimming Pool Cleaning Apparatus |
US20100059604A1 (en) * | 2006-03-02 | 2010-03-11 | Toto Ltd. | Shower apparatus |
US20090218416A1 (en) * | 2006-03-06 | 2009-09-03 | Takahiro Ohashi | Water Discharger |
US20080155975A1 (en) * | 2006-12-28 | 2008-07-03 | Caterpillar Inc. | Hydraulic system with energy recovery |
US9745767B2 (en) | 2013-03-15 | 2017-08-29 | Hayward Industries, Inc. | Swimming pool pressure cleaner including automatic timing mechanism |
US9845609B2 (en) | 2013-03-15 | 2017-12-19 | Hayward Industries, Inc. | Swimming pool pressure cleaner including automatic timing mechanism |
US10407932B2 (en) * | 2013-03-15 | 2019-09-10 | Hayward Industries, Inc. | Swimming pool pressure cleaner including automatic timing mechanism |
Also Published As
Publication number | Publication date |
---|---|
EP0319341A2 (en) | 1989-06-07 |
CA1335166C (en) | 1995-04-11 |
DE3868597D1 (en) | 1992-04-02 |
EP0319341A3 (en) | 1989-11-29 |
EP0319341B1 (en) | 1992-02-26 |
US4949622A (en) | 1990-08-21 |
AU610303B2 (en) | 1991-05-16 |
AU2655688A (en) | 1989-06-08 |
ATE72877T1 (en) | 1992-03-15 |
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Legal Events
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FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO SMALL (ORIGINAL EVENT CODE: SMAL); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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Owner name: GARMAR INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BROOKS, DAVID A.;REEL/FRAME:006359/0369 Effective date: 19921123 |
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Year of fee payment: 4 |
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AS | Assignment |
Owner name: HELLER FINANCIAL INC., AS AGENT Free format text: SECURITY INTEREST;ASSIGNOR:POLARIS POOL SYSTEMS, INC.;REEL/FRAME:007156/0366 Effective date: 19940930 |
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Year of fee payment: 8 |
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REMI | Maintenance fee reminder mailed | ||
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Year of fee payment: 12 |
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AS | Assignment |
Owner name: ING BANK N.V.,UNITED KINGDOM Free format text: SECURITY AGREEMENT;ASSIGNOR:ZODIAC POOL CARE, INC.;REEL/FRAME:019910/0327 Effective date: 20070927 Owner name: ING BANK N.V., UNITED KINGDOM Free format text: SECURITY AGREEMENT;ASSIGNOR:ZODIAC POOL CARE, INC.;REEL/FRAME:019910/0327 Effective date: 20070927 |
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Owner name: ZODIAC POOL SYSTEMS, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:ING BANK N.V., LONDON BRANCH;REEL/FRAME:041318/0263 Effective date: 20161220 |