Patent US4481913A successfully refreshed from Google Patents.
US4481913A
Expired / Lapsed
US
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Hydraulic lash adjuster oil metering ball valve
Assignee: Motors Liquidation Co
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Filing: 1982-12-20
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Granted: 1984-11-13
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Expires: 2002-12-20
Abstract
Abstract A hydraulic lash adjuster has a cylindrical body and a hollow plunger slidably received within the body, with the upper portion of the plunger extending beyond the body and it is provided with a semi-spherical thrust end for sliding engagement with a complementary shaped thrust receiving member. The plunger has an internal oil reservoir supplied with oil at a predetermined pressure and the thrust end is provided with a through bore for the flow of oil therethrough to effect lubrication of the thrust surfaces. A metering valve assembly is positioned in the bore and includes a ball valve operatively received in a cup-shaped valve retainer having a clover-shaped aperture in the base, the ball valve cooperating with this aperture to control oil from the reservoir.
Inventors
- 👤 Rick C. Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:05
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/2405
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
In a hydraulic lash adjuster including a cylindrical outer dashpot body, a hollow plunger telescopically received in said dashpot body with a free end thereof extending axially outward from said dashpot body, said free end having a semispherical reaction surface with a central axial passage extending therethrough, the improvement including a cup-shaped retainer fixed in said passage, said retainer having a base portion next adjacent to said reaction surface with a clover-leaf shaped aperture therein; and, a ball valve operatively supported in said retainer, said clover-leaf aperture including a generally circular portion of a mean diameter less than the outside diameter of said ball valve so as to define a seat for said ball valve and, a plurality of circumferentially spaced apart flutes extending radially outward of said circular portion said flutes being a predetermined cross-sectional area for the predetermined restricted flow of lubricant from said plunger when said ball valve is seated against said seat.
Claim 2
Dependent Claim
156 words
In a hydraulic lash adjuster including a cylindrical outer dashpot body, a hollow plunger telescopically received in said dashpot body with a free end thereof extending axially outward from said dashpot body, said free end having a semispherical reaction surface with a central axial passage extending therethrough, the improvement including a cup-shaped retainer fixed in said passage, said retainer having a base portion next adjacent to said reaction surface with a clover-leaf shaped aperture therein; and, a ball valve operatively supported in said retainer, said clover-leaf aperture including a generally circular portion of a mean diameter less than the outside diameter of said ball valve so as to define a seat for said ball valve and, a plurality of circumferentially spaced apart flutes extending radially outward of said circular portion said flutes being a predetermined cross-sectional area for the predetermined restricted flow of lubricant from said plunger when said ball valve is seated against said seat.
Claim 3
Dependent Claim
192 words
In a hydraulic lash adjuster including a cylindrical outer dashpot body, a hollow plunger telescopically received in said dashpot body with a free end thereof extending axially outward from said dashpot body, said free end having a semi-spherical reaction surface with a central axial passage extending therethrough, the improvement including a ball valve operatively supported in a retainer axially fixed in said passage to control oil flow therethrough, said retainer including a base portion next adjacent to said reaction surface, a cylindrical collar depending from said base portion and a retainer flange extending radially inward from the free end of said collar whereby said ball valve is operatively supported in said retainer, said base portion having a central clover-leaf shaped aperture therein defined by generally circular portions of a mean diameter less than the outside diameter of said ball valve so as to define a seat for said ball valve and, a plurality of circumferentially spaced apart flutes extending radially outward of said circular portions said flutes being of a preselected cross-sectional area for the predetermined restricted flow of lubricant from said plunger when said ball valve is seated against said seat.
Claim 4
Dependent Claim
192 words
In a hydraulic lash adjuster including a cylindrical outer dashpot body, a hollow plunger telescopically received in said dashpot body with a free end thereof extending axially outward from said dashpot body, said free end having a semi-spherical reaction surface with a central axial passage extending therethrough, the improvement including a ball valve operatively supported in a retainer axially fixed in said passage to control oil flow therethrough, said retainer including a base portion next adjacent to said reaction surface, a cylindrical collar depending from said base portion and a retainer flange extending radially inward from the free end of said collar whereby said ball valve is operatively supported in said retainer, said base portion having a central clover-leaf shaped aperture therein defined by generally circular portions of a mean diameter less than the outside diameter of said ball valve so as to define a seat for said ball valve and, a plurality of circumferentially spaced apart flutes extending radially outward of said circular portions said flutes being of a preselected cross-sectional area for the predetermined restricted flow of lubricant from said plunger when said ball valve is seated against said seat.
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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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |