US20070253838A1 - Air compressor unloader system - Google Patents
Air compressor unloader system Download PDFInfo
- Publication number
- US20070253838A1 US20070253838A1 US11/414,014 US41401406A US2007253838A1 US 20070253838 A1 US20070253838 A1 US 20070253838A1 US 41401406 A US41401406 A US 41401406A US 2007253838 A1 US2007253838 A1 US 2007253838A1
- Authority
- US
- United States
- Prior art keywords
- unloading
- compressor
- unloader
- head
- cylinder
- 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.)
- Abandoned
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
- F04B39/125—Cylinder heads
-
- 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
- F04B39/08—Actuation of distribution members
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/03—Stopping, starting, unloading or idling control by means of valves
- F04B49/035—Bypassing
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
- F04B49/243—Bypassing by keeping open the inlet valve
Abstract
An air compressor unloader assembly for unloading the compression chamber of an air compressor during a compressor unloading cycle. The unloader assembly includes an unloader piston slidable within an unloader cylinder in the head of the compressor for slidably engaging the intake valve of the compressor and to hold the intake valve open for unloading of the compression chamber of the compressor pump. The unloading cylinder is accessible from an exterior surface of the head via a removable threaded plug in a gas tight arrangement. The plug is dimensioned whereby the unloader piston may be readily accessed for lubrication and/or removed for repair or replacement without having to remove the head from the air compressor cylinder.
Description
- I. Field of the Invention
- The present invention relates generally to air supply systems using reciprocating type air compressors, and more particularly, to compressor unloading systems which cause a pressure regulating mechanism or governor to displace an unloader piston to engage and hold the intake valve open during a compressor unloading cycle.
- II. Description of the Prior Art
- Piston type reciprocating air compressors are used to supply air under pressure for many purposes. The compressor pump is conventionally driven by either an electric or internal combustion engine. Each compressor pump incorporates a compression chamber closed off with a head and an intake valve and an exhaust valve in the head for regulated gas inlet to and gas outlet from the compression chamber. A compressor unloading assembly is provided for unloading the compression chamber during a compressor unloading cycle to reduce load on the motor when there is no demand on the compressor pump to provide compressed air, or to otherwise regulate the air pressure, particularly in continuous running type compressor pumps.
- Normally the unloader system or assembly includes a pressure regulator, which is also known as a governor, located in the pressure line. The pneumatic control outlet of the governor is connected to an unloader piston which is thereby induced to slidably engage the intake valve and hold the same open to establish the unloading phase of the compressor.
- The problem encountered with the unloader systems or assemblies of the prior art is that this unloader piston is not easily accessible for maintenance or replacement, and in deed, in some prior art compressor pumps the entire head must be removed to gain access to the unloader piston.
- It is therefore a primary object of the present invention to provide an unloading assembly which is easily accessible for maintenance and repair.
- The compressor unloading assembly of the present invention for unloading the compression chamber of the compression pump during a compressor unloading cycle is comprised of an unloader piston slidable with an unloader cylinder in the compressor pump head for engaging the intake valve of the compressor pump and to hold the intake valve open for unloading the compression chamber. This unloading cylinder is accessible from an exterior surface of the pump head via a removable plug which seals the unloading cylinder gas tihhy. For example, with a threaded plug. The plug is dimensioned whereby the unloader piston may be easily accessed for lubrication and/or removed for repair without having to remove the head from the compressor cylinder or having to remove difficult housing assemblies.
- A pressure governor is provided and its inlet is connected to receive gas outlet under pressure from the compressor pump. Its outlet is connected to the unloader cylinder for moving the unloader piston to open the intake valve of the compressor pump with gas under pressure when a predetermined gas outlet pressure from the compressor pump has been attained. The unloader assembly is designed whereby the unloader piston slides downwardly toward the compression chamber to engage and hold open the intake valve.
- Other objects and advantages appear hereinafter in the following description and claims. The accompanying drawings show, for the purpose of exemplification, without limiting the invention or appended claims, certain practical embodiments of the present invention wherein:
-
FIG. 1 is an exploded isometric view of an air compressor incorporating the unloading assembly of the present invention; and -
FIG. 2 is an enlarged exploded isometric view of the head of the air compressor shown inFIG. 1 illustrating some of the details of the unloader assembly of the present invention. - The basic air compressor illustrated is of conventional type, except for the unloading assembly of the present invention, and is a two cylinder single stage air compressor pump 10. Of course the unloading assembly of the present invention is also applicable to all types of gas or air compressors, including two stage compressors.
- The compressor 10 includes generally a crankcase housing 11 enclosing the crankcase/
piston assembly 12 with the pistons thereof reciprocally received withindual cylinder 13. On top ofcylinder 13 is securedvalve plate 14 which retains steeldisc intake valves 15 and identical typesteel exhaust valves 16.Head 17 is secured to the top ofvalve plate 14. -
Air intake filter 18 is secured to inlet 19 forhead 17 to filter intake air. -
Typical fly wheel 20 with an internal cooling fan is provided on the end of the crank shaft/piston assembly 12. - The single stage compressor pump thus far described operates in a conventional manner well known by the prior art, with the exception of the unloading assembly provided in
head 17, to be later described in detail. Accordingly, specific operation of the compressor pump need not and will not be described as this basic pump assembly has been readily available for purchase on the open market from Jenny Products, Inc. of Somerset, Pa. - The specifics of the unloading assembly of the present invention is incorporated into
head 17. - The
unloader assembly 30 of the present invention is comprised ofunloader pistons 31 which are slidable withinunloader cylinders 32 inhead 17. Pistons 31 are slidable downward withincylinders 32 for engaging steeldisc intake valves 15 and to hold them open for unloadingcompression chambers 21. Theunloading cylinders 32 are accessible fromexterior surface 33 ofhead 17 via removable threadedplugs 34. Plugs 34seal cylinders 32 gas tight with O-rings 35. - The
upper surfaces 36 ofunloader pistons 31 are exposed to gas under pressure entering throughinlet 37 in head 17 (seeFIG. 2 ). Gas under pressure is fed to inlet 17 viaconventional pressure governor 38 having aninlet 39 connected to receive gas outlet under pressure from compressor 10 viaoutlet 25 inhead 17.Outlet 40 of governor 38 is connected tounloader cylinders 32 viainlet passage 37 for moving theunloader pistons 31 downwardly to openintake valves 15 with gas under pressure, as regulated byregulator 38, from compressor 10 when the pressure has attained a predetermined maximum. - The
unloader pistons 31 are seated withinunloader cylinders 32 by means of O-rings 41 andcompression springs 42 serve to disengageunloader pistons 31 when the governor 38 is no longer applying gas under pressure topistons 31.
Claims (4)
1. In a reciprocating gas compressor having a compression chamber closed off with a head and an intake valve and an exhaust valve in said head for regulated gas inlet to and gas outlet from said chamber, and a compressor unloading assembly for unloading said chamber during a compressor unloading cycle, said unloading assembly comprising:
an unloader piston slidable within an unloader cylinder in said head for engaging said intake valve to hold said intake valve open for unloading said compression chamber, said unloading cylinder accessible from an exterior surface of said head via a removable plug sealing said unloading cylinder gas tight, said plug dimensioned whereby said unloader piston may be readily accessed and removed for repair without having to remove said head from said compressor cylinder.
2. The unloading assembly set forth in claim 1 , including a pressure governor having an inlet connected to receive gas outlet under pressure from said compressor and having an outlet connected to said unloader cylinder for moving said unloader piston to open said intake valve with gas under pressure when a predetermined gas outlet pressure from said compressor has been attained.
3. The unloading assembly set forth in claim 2 , wherein said plug is threadably received in said head.
4. The unloading assembly set forth in claim 2 , wherein said unloader piston slides toward said compression chamber to engage and hold open said intake valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/414,014 US20070253838A1 (en) | 2006-04-28 | 2006-04-28 | Air compressor unloader system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/414,014 US20070253838A1 (en) | 2006-04-28 | 2006-04-28 | Air compressor unloader system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070253838A1 true US20070253838A1 (en) | 2007-11-01 |
Family
ID=38648491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/414,014 Abandoned US20070253838A1 (en) | 2006-04-28 | 2006-04-28 | Air compressor unloader system |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070253838A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130071260A1 (en) * | 2011-09-15 | 2013-03-21 | Bret Dwayne Worden | System and method for diagnosing a reciprocating compressor |
US20130294935A1 (en) * | 2012-04-20 | 2013-11-07 | General Electric Company | System and method for a compressor |
US9651040B2 (en) | 2014-04-28 | 2017-05-16 | Bendix Commercial Vehicle Systems Llc | Unloader valve apparatus for an air compressor |
US9897082B2 (en) | 2011-09-15 | 2018-02-20 | General Electric Company | Air compressor prognostic system |
US10338580B2 (en) | 2014-10-22 | 2019-07-02 | Ge Global Sourcing Llc | System and method for determining vehicle orientation in a vehicle consist |
US10464579B2 (en) | 2006-04-17 | 2019-11-05 | Ge Global Sourcing Llc | System and method for automated establishment of a vehicle consist |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1421309A (en) * | 1921-01-17 | 1922-06-27 | Ingersoll Rand Co | Compressor unloader |
US3518032A (en) * | 1968-05-24 | 1970-06-30 | Dresser Ind | Compressor cylinder unloader |
US3936236A (en) * | 1972-10-10 | 1976-02-03 | Midland-Ross Corporation | Compressor intake valve and control means |
US4472112A (en) * | 1979-05-08 | 1984-09-18 | Wabco Fahrzeugbremsen Gmbh | Pressure control arrangements for an air compression system |
US4505648A (en) * | 1981-09-17 | 1985-03-19 | Wabco Fahrzeugbremsen Gmbh | Unloading mechanisms for air compressors |
US4536132A (en) * | 1981-02-25 | 1985-08-20 | London Fog, Inc. | Gas compressor |
US5605449A (en) * | 1996-01-25 | 1997-02-25 | Wendy Buskop | Suction and discharge valve arrangement for a high pressure piston pump |
US5700137A (en) * | 1995-07-28 | 1997-12-23 | Gp Companies, Inc. | Low profile positive displacement pump system |
US6053713A (en) * | 1997-07-26 | 2000-04-25 | Knorr-Bremse Systems For Commercial Vehicles Limited | Gas compressors |
US6309186B1 (en) * | 2000-01-12 | 2001-10-30 | General Motors Corporation | Air conditioning pressure relief valve assembly |
US20020146328A1 (en) * | 2001-03-06 | 2002-10-10 | Naoya Yokomachi | Compressor provided with pressure relief valve |
US7270145B2 (en) * | 2002-08-30 | 2007-09-18 | Haldex Brake Corporation | unloading/venting valve having integrated therewith a high-pressure protection valve |
-
2006
- 2006-04-28 US US11/414,014 patent/US20070253838A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1421309A (en) * | 1921-01-17 | 1922-06-27 | Ingersoll Rand Co | Compressor unloader |
US3518032A (en) * | 1968-05-24 | 1970-06-30 | Dresser Ind | Compressor cylinder unloader |
US3936236A (en) * | 1972-10-10 | 1976-02-03 | Midland-Ross Corporation | Compressor intake valve and control means |
US4472112A (en) * | 1979-05-08 | 1984-09-18 | Wabco Fahrzeugbremsen Gmbh | Pressure control arrangements for an air compression system |
US4536132A (en) * | 1981-02-25 | 1985-08-20 | London Fog, Inc. | Gas compressor |
US4505648A (en) * | 1981-09-17 | 1985-03-19 | Wabco Fahrzeugbremsen Gmbh | Unloading mechanisms for air compressors |
US5700137A (en) * | 1995-07-28 | 1997-12-23 | Gp Companies, Inc. | Low profile positive displacement pump system |
US5605449A (en) * | 1996-01-25 | 1997-02-25 | Wendy Buskop | Suction and discharge valve arrangement for a high pressure piston pump |
US6053713A (en) * | 1997-07-26 | 2000-04-25 | Knorr-Bremse Systems For Commercial Vehicles Limited | Gas compressors |
US6309186B1 (en) * | 2000-01-12 | 2001-10-30 | General Motors Corporation | Air conditioning pressure relief valve assembly |
US20020146328A1 (en) * | 2001-03-06 | 2002-10-10 | Naoya Yokomachi | Compressor provided with pressure relief valve |
US7270145B2 (en) * | 2002-08-30 | 2007-09-18 | Haldex Brake Corporation | unloading/venting valve having integrated therewith a high-pressure protection valve |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10464579B2 (en) | 2006-04-17 | 2019-11-05 | Ge Global Sourcing Llc | System and method for automated establishment of a vehicle consist |
US20130071260A1 (en) * | 2011-09-15 | 2013-03-21 | Bret Dwayne Worden | System and method for diagnosing a reciprocating compressor |
US8984930B2 (en) * | 2011-09-15 | 2015-03-24 | General Electric Company | System and method for diagnosing a reciprocating compressor |
US9897082B2 (en) | 2011-09-15 | 2018-02-20 | General Electric Company | Air compressor prognostic system |
US20130294935A1 (en) * | 2012-04-20 | 2013-11-07 | General Electric Company | System and method for a compressor |
US9677556B2 (en) | 2012-04-20 | 2017-06-13 | General Electric Company | System and method for a compressor |
US9771933B2 (en) * | 2012-04-20 | 2017-09-26 | General Electric Company | System and method for a compressor |
US10233920B2 (en) | 2012-04-20 | 2019-03-19 | Ge Global Sourcing Llc | System and method for a compressor |
US9651040B2 (en) | 2014-04-28 | 2017-05-16 | Bendix Commercial Vehicle Systems Llc | Unloader valve apparatus for an air compressor |
US10338580B2 (en) | 2014-10-22 | 2019-07-02 | Ge Global Sourcing Llc | System and method for determining vehicle orientation in a vehicle consist |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JENNY PRODUCTS, INCORPORATED, PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEISS, DANIEL;REEL/FRAME:017848/0578 Effective date: 20060425 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |