US3766619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor valve assembly and method of producing the same
Assignee: SHARON MF CO
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Filing: 1971-11-17
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Granted: 1973-10-23
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Expires: 1991-11-17
Abstract
Abstract A laminated valve plate assembly for a reciprocable piston compressor said plate being of the type formed substantially by stamping processes and characterized by being only two laminations thick and having at least some of the port defining surfaces which are smooth and have compound curvatures that are inclined with respect to the plane of the plate to provide a less turbulent flow through the ports and to reduce the required thickness of the finished valve plate. The outlet end portions of both the intake and exhaust means comprise continuous slots formed by stamping processes and stamped parts while the inlet end portions of these port means comprise a plurality of discontinuous slots. Perhipheral recesses are formed around the top and bottom surfaces of the plate by shearingly depressing the edges thereof to eliminate burrs and to protect the edges of the lapped top and bottom surfaces from damage due to rough handling prior to the installation of the valve assembly between the cylinder head and cylinder block of the compressor. The disclosure also includes novel methods for forming the above mentioned structures.
Inventors
- 👤 S Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:03
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; F04B39/108; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/494; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49421; Y10T29/49423
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
290 words
A method of producing a laminated valve plate assembly comprising the steps of stamping an annular groove in the surface of a first planar plate member, subsequently removing portions of said plate underlying said groove by means of a segmented annular die having a slightly narrower width than the width of said groove to produce a first port means having a continuous annular opening extending partially through said plate and communicating with a segmented annular opening extending through the remaining thickness of said first member, piercing a concentrically disposed series of elongated arcuate ports in said first plate member around the outside of said first port means such that their port defining surfaces are perpendicular to the plane of the plate member, said series of ports having their innermost surfaces disposed along a common first circumference and their outermost surfaces disposed along a second circumference spaced outwardly from said first circumference, striking only the inner circumferential edge portions of the ports of said series on the side of said plate member opposite the said annularly grooved side with a coining die having the desired inclined surface configuration so as to produce a work-hardened port defining surface that is inclined with respect to the plane of said first plate member while leaving the outermost circumferential surfaces of said ports of said series perpendicular to the plane of said first plate member, forming port means in a second plate member, said port means having a port defining surface inclined correspondingly with the inclined port defining surfaces of said first plate member, superimposing one plate member upon the other with their inclined surfaces facing each other, bonding said members together and abrasively finishing the outer surfaces of the laminated plate assembly formed thereby.
Claim 2
Independent Claim
290 words
A method of producing a laminated valve plate assembly comprising the steps of stamping an annular groove in the surface of a first planar plate member, subsequently removing portions of said plate underlying said groove by means of a segmented annular die having a slightly narrower width than the width of said groove to produce a first port means having a continuous annular opening extending partially through said plate and communicating with a segmented annular opening extending through the remaining thickness of said first member, piercing a concentrically disposed series of elongated arcuate ports in said first plate member around the outside of said first port means such that their port defining surfaces are perpendicular to the plane of the plate member, said series of ports having their innermost surfaces disposed along a common first circumference and their outermost surfaces disposed along a second circumference spaced outwardly from said first circumference, striking only the inner circumferential edge portions of the ports of said series on the side of said plate member opposite the said annularly grooved side with a coining die having the desired inclined surface configuration so as to produce a work-hardened port defining surface that is inclined with respect to the plane of said first plate member while leaving the outermost circumferential surfaces of said ports of said series perpendicular to the plane of said first plate member, forming port means in a second plate member, said port means having a port defining surface inclined correspondingly with the inclined port defining surfaces of said first plate member, superimposing one plate member upon the other with their inclined surfaces facing each other, bonding said members together and abrasively finishing the outer surfaces of the laminated plate assembly formed thereby.
Claim 3
Dependent Claim
36 words
A stamping process according to claim 1 wherein the inclined surface of said coining die is curved in the direction of incline and the coined port surface produced thereby has a surface roughness between 50-150 microinches.
Claim 4
Dependent Claim
82 words
A stamping process for producing a ported valve plate, said process including the steps of stamping an annular groove in one of the planar surfaces of said plate and subsequently removing portions of said plate underlying said groove by means of a segmented annular die having a slightly narrower width than said groove to produce a port means having a continuous annular opening extending partially through said plate and communicating with a segmented annular opening extending through the balance of said plate.
Claim 5
Dependent Claim
82 words
A stamping process for producing a ported valve plate, said process including the steps of stamping an annular groove in one of the planar surfaces of said plate and subsequently removing portions of said plate underlying said groove by means of a segmented annular die having a slightly narrower width than said groove to produce a port means having a continuous annular opening extending partially through said plate and communicating with a segmented annular opening extending through the balance of said plate.
Claim 6
Dependent Claim
41 words
A process according to claim 1 including the step of shearingly depressing the peripheral edges of the bonded plate so as to remove burrs therefrom and protect the finished planar outer surfaces thereof from damage prioR to installation in a compressor.
Claim 7
Independent Claim
129 words
A method of producing a valve plate having a series of elongated arcuate ports with the innermost port defining surfaces of each port of the series disposed along a common first circumference and with the outermost port defining surfaces disposed along a common second circumference spaced from said first circumference, said method comprising the steps of: piercing the ports such that their port defining surfaces are perpendicular to the plane of the plate and subsequently striking only the inner circumferential edge portions of said ports with a coining die having the desired incline and surface configuration so as to produce a work-hardened port defining surface that is inclined with respect to the plane of the plate while leaving the outermost circumferential surfaces perpendicular to the plane of the plate.
Claim 8
Independent Claim
129 words
A method of producing a valve plate having a series of elongated arcuate ports with the innermost port defining surfaces of each port of the series disposed along a common first circumference and with the outermost port defining surfaces disposed along a common second circumference spaced from said first circumference, said method comprising the steps of: piercing the ports such that their port defining surfaces are perpendicular to the plane of the plate and subsequently striking only the inner circumferential edge portions of said ports with a coining die having the desired incline and surface configuration so as to produce a work-hardened port defining surface that is inclined with respect to the plane of the plate while leaving the outermost circumferential surfaces perpendicular to the plane of the plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |