Patent US4517936A successfully refreshed from Google Patents.
US4517936A
Expired / Lapsed
US
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Tappet for internal combustion engines with variable profile camshafts
Assignee: Fiat Auto SpA
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Filing: 1983-10-12
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Granted: 1985-05-21
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Expires: 2003-10-12
Abstract
Abstract A tappet for use in internal combustion engines having variable-profile camshafts comprises an oscillating sliding block with a flat surface for contact with a cam, a bearing saddle for the block having anti-rotation guides, and a cup with shoulders for retaining the bearing saddle.
Inventors
- 👤 Antonio Burgio di Aragona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:42
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/143; F01L13/00; F01L13/0015; F01L13/0036; F01L13/0042; F01L2307/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A tappet for engines with variable-profile cam shafts comprising: a substantially rectangular sliding block having a flat surface for contact with a cam and a projection of part-circular section on the surface thereof opposite to said flat surface which extends parallel to the major axis of said block; a bearing saddle for said sliding block comprising an elongated central portion having a major axis parallel to the major axis of said block with an elongated groove in the upper surface of said central portion parallel to the major axis thereof receiving said projection of said sliding block and having two semi-cylindrical guides disposed on opposite sides of said saddle portion fo engagement with complementary seats in an engine head to prevent rotation of said saddle about a valve axis; a cylindrical cup having an upper surface with two spaced apart tabs protruding axially therefrom to define a seat for receiving said bearing saddle for withstanding the thrust generated by the sliding of the cam on said sliding block and a cylindrical seat disposed between said tabs; and tappet adjustment means engageable in said cylindrical seat of said cup.
Claim 2
Dependent Claim
188 words
A tappet for engines with variable-profile cam shafts comprising: a substantially rectangular sliding block having a flat surface for contact with a cam and a projection of part-circular section on the surface thereof opposite to said flat surface which extends parallel to the major axis of said block; a bearing saddle for said sliding block comprising an elongated central portion having a major axis parallel to the major axis of said block with an elongated groove in the upper surface of said central portion parallel to the major axis thereof receiving said projection of said sliding block and having two semi-cylindrical guides disposed on opposite sides of said saddle portion fo engagement with complementary seats in an engine head to prevent rotation of said saddle about a valve axis; a cylindrical cup having an upper surface with two spaced apart tabs protruding axially therefrom to define a seat for receiving said bearing saddle for withstanding the thrust generated by the sliding of the cam on said sliding block and a cylindrical seat disposed between said tabs; and tappet adjustment means engageable in said cylindrical seat of said cup.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |