US3628514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tappets
Assignee: Simms Group Research and Development Ltd
•
Filing: 1970-01-14
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Granted: 1971-12-21
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Expires: 1990-01-14
Abstract
Abstract A tappet assembly including a hollow cylindrical tappet housing a roller assembly carried by a pin, the pin having extending portions beyond the side faces of the roller and the tappet assembly including a bridge piece having leg portions, which bear upon the pin. The force is transmitted from a cam acting upon the roller assembly to the bridge piece by way of the roller assembly, the extending portions of the pin and the leg portions of the bridge piece. The tappet housing serving only to locate the bridge piece and roller and to guide the movement of same under the action of the cam.
Inventors
- 👤 Ronald Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/06; F01; F01L; F01L1/00; F01L1/12; F01L1/14; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A tappet assembly for use in a high-speed reciprocating mechanism, the assembly comprising a hollow tappet housing the periphery of which defines a bearing surface for cooperation with a complementary bearing surface defined in a body mounting the mechanism, a roller mounted on the tappet housing for cooperation with a rotary cam to effect reciprocation of the housing, a pin about which the roller is mounted, extending end portions on the pin, opposed apertures formed in the tappet housing into which said extending end portions of the pin extend, flats formed on said extending end portions of the pins, a bridgepiece located within the tappet housing, said bridgepiece defining a surface for abutment with a member required to be reciprocated by the cam, and leg portions on the bridgepiece, said leg portions engaging with the flats on the extending end portions of the pin, whereby the force is transmitted from the roller to the surface on the bridgepiece by way of the extending portions of the pin and said leg portions.
Claim 2
Dependent Claim
171 words
A tappet assembly for use in a high-speed reciprocating mechanism, the assembly comprising a hollow tappet housing the periphery of which defines a bearing surface for cooperation with a complementary bearing surface defined in a body mounting the mechanism, a roller mounted on the tappet housing for cooperation with a rotary cam to effect reciprocation of the housing, a pin about which the roller is mounted, extending end portions on the pin, opposed apertures formed in the tappet housing into which said extending end portions of the pin extend, flats formed on said extending end portions of the pins, a bridgepiece located within the tappet housing, said bridgepiece defining a surface for abutment with a member required to be reciprocated by the cam, and leg portions on the bridgepiece, said leg portions engaging with the flats on the extending end portions of the pin, whereby the force is transmitted from the roller to the surface on the bridgepiece by way of the extending portions of the pin and said leg portions.
Claim 3
Dependent Claim
29 words
A tappet assembly as claimed in claim 1 in which the extending portions of said pin are provided with flats against which said leg portion of the bridgepiece bear.
Claim 4
Dependent Claim
28 words
A tappet assembly as claimed in claim 2 in which the end portions of said extending portions of the pin extend within apertures formed in said tappet housing.
Claim 5
Dependent Claim
49 words
A tappet assembly as claimed in claim 1 in which said housing is of hollow cylindrical form, an inwardly extending flange at the end of the housing adjacent the roller, said flange bearing against the end faces of the roller to provide location of the roller within the housing.
Claim 6
Dependent Claim
28 words
A tappet assembly as claimed in claim 4 in which the end faces of the bridgepiece are shaped for cooperation with the internal surface of the tappet housing.
Claim 7
Dependent Claim
34 words
A tappet assembly as claimed in claim 5 including a circlip engaged within a groove formed in the internal surface of a tappet housing, said circlip acting to retain the bridgepiece within the housing.
Claim 8
Dependent Claim
25 words
A tappet assembly as claimed in claim 6 in which the roller comprises an annular member rotatably mounted about a sleeve carried by the pin.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |