EP1126170B1 - Pump with tapered bore - Google Patents
Pump with tapered bore Download PDFInfo
- Publication number
- EP1126170B1 EP1126170B1 EP00301134A EP00301134A EP1126170B1 EP 1126170 B1 EP1126170 B1 EP 1126170B1 EP 00301134 A EP00301134 A EP 00301134A EP 00301134 A EP00301134 A EP 00301134A EP 1126170 B1 EP1126170 B1 EP 1126170B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- gas
- pump according
- bore
- vapour
- 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
- F04B39/126—Cylinder liners
-
- 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
- F04B33/00—Pumps actuated by muscle power, e.g. for inflating
- F04B33/005—Pumps actuated by muscle power, e.g. for inflating specially adapted for inflating tyres of non-motorised vehicles, e.g. cycles, tricycles
-
- 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
- F04B39/0005—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 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/02—Rubber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Details Of Reciprocating Pumps (AREA)
- Compressor (AREA)
Abstract
Description
Thus in use, the cross section of the cylinder remains constant throughout its length.
Ratio of initial piston area to final piston area | Final piston force as fraction of parallel bore pump of radius =1 | Final area of piston (sq cm) | Final radius of piston (cm) | Initial area of piston (cm) | Initial radius of piston (cm) | Semi-angle of taper (deg) | Fig | Ratio of initial to final diameters |
1 | 1 | 3.142 | 1 | 3.142 | 1 | 0 | 1 | |
1.906 | 0.7 | 2.199 | 0.837 | 4.192 | 1.155 | 0.521 | 1.38 | |
2.437 | 0.6 | 1.885 | 0.775 | 4.593 | 1.209 | 0.71 | 1.56 | |
3.211 | 0.5 | 1.571 | 0.707 | 5.044 | 1.267 | 0.917 | 1 | 1.792 |
4.402 | 0.4 | 1.257 | 0.633 | 5.533 | 1.327 | 1.136 | 4a | 2.096 |
6.456 | 0.3 | 0.943 | 0.548 | 6.088 | 1.392 | 1.381 | 4b | 2.54 |
10.737 | 0.2 | 0.628 | 0.447 | 6.743 | 1.465 | 1.666 | 4c | 3.277 |
24.102 | 0.1 | 0.314 | 0.316 | 7.568 | 1.552 | 2.023 | 4d | 4.911 |
Claims (20)
- A gas or vapour pump comprising a piston (4) slideably accommodated in a bore (2) in a housing (1) characterised in that the piston is compressible and the cross sectional area of the bore (2) decreases towards an outlet (3) of the pump, the piston (4) being arranged to remain in sealing contact with the surface of the bore (2) throughout the piston stroke.
- A gas or vapour pump according to claim 1 wherein the ratio of the cross sectional area of the bore (2) at the outlet region of the housing to the cross sectional area at the opposed end of the housing is in the range of from 1:1.2 - 1:25.
- A gas or vapour pump according to claim 2 wherein the said ratio is in the range of from 1:2.5 - 1:5.
- A gas or vapour pump according to claim 3 wherein the said ratio is about 1:3.
- A gas or vapour pump according to any one of the preceding claims wherein the bore (2) of the housing (1) is circular.
- A gas or vapour pump according to claim 5 wherein the bore (2) of the housing (1) has a substantially frustro-cone shape.
- A gas or vapour pump according to any one of the preceding claims wherein the compressible piston (4) comprises an elastomer or rubber material.
- A gas or vapour pump according to claim 7 wherein the compressible piston (4) comprises an elastomer which is a synthetic foam.
- A gas or vapour pump according to any one of the preceding claims wherein the piston (4) is shaped so as to facilitate compression thereof within the housing (1).
- A gas or vapour pump according to claim 9 wherein the piston (4) has a cup shape where the rim of the cup is in sealing contact with the internal surface of the bore (2).
- A gas or vapour pump according to any one of claims 1 to 8 wherein the piston (4) comprises a fluid filled sac.
- A gas or vapour pump according to any one of the preceding claims which further comprises means (9) to ensure that the piston (4) remains axially centred within the housing (1) throughout its stroke.
- A gas or vapour pump according to claim 12 wherein the said means comprises a guide (9) supported on a rod (7) of the piston (4) and arranged to contact the internal surface of the bore throughout the piston stroke.
- A gas or vapour pump according to claim 13 wherein the guide (9) comprises a plurality of rigid elements (10) which project outwardly from the region of the piston rod (7).
- A gas or vapour pump according to claim 14 which comprises from 2 to 8 of said elements (10).
- A gas or vapour pump according to claim 14 or claim 15 wherein the elements (10) are spaced equidistantly around the piston rod (7).
- A gas or vapour pump according to claim 12 wherein said means comprises a rigid axial sleeve (12), arranged to slideably accommodate the piston rod along a portion of its length.
- A pump according to any one of the preceding claims which is a bicycle pump.
- A pump according to any one of claims 1 to 17 which is driven mechanically.
- A method of supplying a gas or vapour under pressure, said method comprising the use of a pump according to any one of the preceding claims.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00301134A EP1126170B1 (en) | 2000-02-15 | 2000-02-15 | Pump with tapered bore |
DE60023264T DE60023264T2 (en) | 2000-02-15 | 2000-02-15 | Pump with a conical bore for the piston |
ES00301134T ES2246807T3 (en) | 2000-02-15 | 2000-02-15 | PUMP WITH CONICAL HOLE. |
AT00301134T ATE307291T1 (en) | 2000-02-15 | 2000-02-15 | PUMP WITH A CONICAL BORE FOR THE PISTON |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00301134A EP1126170B1 (en) | 2000-02-15 | 2000-02-15 | Pump with tapered bore |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1126170A1 EP1126170A1 (en) | 2001-08-22 |
EP1126170B1 true EP1126170B1 (en) | 2005-10-19 |
Family
ID=8172703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00301134A Expired - Lifetime EP1126170B1 (en) | 2000-02-15 | 2000-02-15 | Pump with tapered bore |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1126170B1 (en) |
AT (1) | ATE307291T1 (en) |
DE (1) | DE60023264T2 (en) |
ES (1) | ES2246807T3 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1031227A (en) * | 1951-01-20 | 1953-06-22 | Marcel Gaupillat Ets | Improvements to pumps of the bicycle pump type |
GB997662A (en) * | 1961-01-16 | 1965-07-07 | Bluemel Brothers Ltd | Improvements in or relating to inflators |
US3878767A (en) | 1973-12-17 | 1975-04-22 | Caterpillar Tractor Co | High pressure radial piston fluid translating device and cylinder construction therefor |
GB2070731B (en) * | 1980-02-19 | 1983-01-19 | Wall & Leigh Thermoplastics | Beer pump |
US4524877A (en) * | 1984-01-09 | 1985-06-25 | Saxby Willard A | Pressurizing and closure apparatus for carbonated beverage containers |
US4997420A (en) | 1989-12-28 | 1991-03-05 | Lefevre Robert J | Portable drug delivery device including pump with tapered barrel |
GB2341898B (en) * | 1998-06-26 | 2001-10-10 | David John Kay Shaw | Pump |
-
2000
- 2000-02-15 ES ES00301134T patent/ES2246807T3/en not_active Expired - Lifetime
- 2000-02-15 EP EP00301134A patent/EP1126170B1/en not_active Expired - Lifetime
- 2000-02-15 AT AT00301134T patent/ATE307291T1/en not_active IP Right Cessation
- 2000-02-15 DE DE60023264T patent/DE60023264T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1126170A1 (en) | 2001-08-22 |
ES2246807T3 (en) | 2006-03-01 |
ATE307291T1 (en) | 2005-11-15 |
DE60023264T2 (en) | 2006-07-13 |
DE60023264D1 (en) | 2006-03-02 |
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