US3782345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metered mechanical tappet with slotted push rod seat
Assignee: Sealed Power Technologies LP
•
Filing: 1971-06-03
•
Granted: 1974-01-01
•
Expires: 1991-06-03
Abstract
Abstract A metered mechanical tappet utilizing a push rod seat permanently retained by a separate retainer or by a press-fit within the cavity of the tappet upon an annular shoulder of t he latter. Oil flow is obtained by a slot in the surface of the seat supported by said shoulder, the slot at least extending radially from the oil reservoir directly below the seat to the outer wall of the seat, from whence it passes to the interior of the seat and to the push rod by means of an annular path between the outer seat wall and the cavity along at least a portion of the axial extension of the seat. The actual metering is accomplished by either the slot, in which case the annular path has a substantial radial thickness; or by the annular path, in which case its thickness is considerably less than any of the dimensions of the slot.
Inventors
- 👤 R Erickson
- 👤 R Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F01M; F01M9/00; F01M9/10; F01M9/104; F16; F16H; F16H53/00; F16H53/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
In a mechanical tappet operatively connected to a push rod and comprising a tappet body having an oil reservoir, a push rod seat positioned within a cavity of said tappet and movable into and out of engagement with an annular shoulder of said tappet body, said seat having an opening communicating with said push rod, and means located between said reservoir and said opening for metering oil from said reservoir into said rod; the improvement comprising a passageway for said oil between said reservoir and metering means including a slot means in one of the engaging surfaces of said seat and said tappet body, said slot means extending at least to the reservoir and providing a means for permitting oil to flow continuously from said reservoir to said metering means and into said push rod regardless of whether said rod seat is bearing against said annular shoulder.
Claim 2
Dependent Claim
147 words
In a mechanical tappet operatively connected to a push rod and comprising a tappet body having an oil reservoir, a push rod seat positioned within a cavity of said tappet and movable into and out of engagement with an annular shoulder of said tappet body, said seat having an opening communicating with said push rod, and means located between said reservoir and said opening for metering oil from said reservoir into said rod; the improvement comprising a passageway for said oil between said reservoir and metering means including a slot means in one of the engaging surfaces of said seat and said tappet body, said slot means extending at least to the reservoir and providing a means for permitting oil to flow continuously from said reservoir to said metering means and into said push rod regardless of whether said rod seat is bearing against said annular shoulder.
Claim 3
Dependent Claim
56 words
The improvement as defined in claim 1 wherein said passageway includes an annular path between at least a portion of the outer wall of said seat and the concentric wall of said tappet body, and said slot extends from the outer diameter of said seat wall at least to a point in communication with said reservoir.
Claim 4
Dependent Claim
36 words
The improvement as defined in claim 2 wherein said annular path has a predetermined radial thickness which is substantially less than any of the dimensions of said slot, whereby said annular path defines the metering fuNction.
Claim 5
Dependent Claim
19 words
The improvement as defined in claim 2 wherein said slot extends across the entire supported surface of said seat.
References Cited (Backward Citations)
US2874685A
Cited
US3280807A
Cited
US3448730A
Cited
US3477416A
Cited
US3476093A
Cited
US3437080A
Cited
US3598095A
Cited
US3630179A
Cited
US3636932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |