US3658038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tappet for overhead camshaft engine
Assignee: Johnson Products Inc
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Filing: 1971-01-04
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Granted: 1972-04-25
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Expires: 1991-01-04
Abstract
Abstract A hydraulic valve lifter assembly is interposed directly between a spring biased valve stem and cam, the valve lifter assembly comprising a plunger slidably mounted within a valve lifter body forming a pressurized chamber the body and plunger movable axially within a cylinder head guide. A tubular shaped intermediate member is secured to the valve lifter body by a spring clip, the sides of the member being in slidable engagement with the guide and fitting over the end portion of the valve stem and associated spring. A constricted portion of the tubular member engages the valve body and is detachably connected thereto by the spring clip.
Inventors
- 👤 Paul F Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F01L1/25
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
106 words
In an engine having an overhead cam valve lifter assembly comprising, in combination: a cam means; a tappet guide means; a spring biased valve stem; a valve lifter body having a closed end engageable with said cam means; a plunger slidably mounted in said lifter body for reciprocating movement therebetween, said plunger engaging said stem; the improvement comprising: said valve lifter body spaced radially from said guide means; an intermediate member connected to said lifter body and slidable within said guide means to provide axial movement of said lifter body within said guide means; and connector means for connecting said intermediate member to said lifter body.
Claim 2
Dependent Claim
106 words
In an engine having an overhead cam valve lifter assembly comprising, in combination: a cam means; a tappet guide means; a spring biased valve stem; a valve lifter body having a closed end engageable with said cam means; a plunger slidably mounted in said lifter body for reciprocating movement therebetween, said plunger engaging said stem; the improvement comprising: said valve lifter body spaced radially from said guide means; an intermediate member connected to said lifter body and slidable within said guide means to provide axial movement of said lifter body within said guide means; and connector means for connecting said intermediate member to said lifter body.
Claim 3
Dependent Claim
19 words
The combination according to claim 1 wherein said connector means detachably mounts said intermediate member to said lifter body.
Claim 4
Dependent Claim
15 words
The combination according to claim 2 wherein said connector is comprised of a spring clip.
Claim 5
Dependent Claim
51 words
The combination according to claim 1 wherein said intermediate member is generally tubular in shape and includes sides in slidable engagement with said guide means and open ends, one of said ends fitting around said valve lifter body, the other end fitting over said spring biased valve stem and associated spring.
Claim 6
Dependent Claim
18 words
The combination according to claim 4 wherein said means detachably mounts said intermediate member to said lifter body.
Claim 7
Dependent Claim
15 words
The combination according to claim 5 wherein said means is comprised of a spring clip.
Claim 8
Dependent Claim
20 words
The combination according to claim 4 wherein said intermediate member includes a constricted portion engaged with said valve lifter body.
Claim 9
Dependent Claim
24 words
The combination according to claim 7 wherein said means is comprised of a spring clip detachably mounting said intermediate mEmber to said lifter body.
Claim 10
Dependent Claim
82 words
The combination according to claim 7 wherein a portion of the sides of said tubular member are depressed inwardly to form said constricted portion, said constricted portion including a pair of apertures therethrough, said valve lifter body including a recessed opening in alignment with said apertures, said means comprising a generally C-shaped spring clip having an inturned ear on each end thereof said ears being inserted into said apertures and openings to detachably join said intermediate member to said valve lifter body.
Claim 11
Dependent Claim
21 words
The combination according to claim 9 wherein said valve lifter body opening comprises a groove around the periphery of said body.
Claim 12
Dependent Claim
38 words
The combination according to claim 9 wherein said one of said open ends of said intermediate member is turned inwardly to provide a flange in snug engagement with said valve lifter body spaced axially from said constricted portion.
Claim 13
Dependent Claim
109 words
An improved hydraulic valve lifter assembly for an overhead cam shaft engine having a cam shaft with cams spaced therealong, and a tappet guide means for guiding a tappet comprising: a valve lifter body having a closed end provided for engagement with a cam of an overhead cam shaft; a plunger body slidably mounted in said lifter body for reciprocal movement and adapted for engagement with a valve stem; a sleeve-like member secured to and extending about the periphery of said lifter body and adapted for sliding movement in a tappet guide means to provide support for and axial movement of said lifter body in said tappet guide means.
Claim 14
Dependent Claim
109 words
An improved hydraulic valve lifter assembly for an overhead cam shaft engine having a cam shaft with cams spaced therealong, and a tappet guide means for guiding a tappet comprising: a valve lifter body having a closed end provided for engagement with a cam of an overhead cam shaft; a plunger body slidably mounted in said lifter body for reciprocal movement and adapted for engagement with a valve stem; a sleeve-like member secured to and extending about the periphery of said lifter body and adapted for sliding movement in a tappet guide means to provide support for and axial movement of said lifter body in said tappet guide means.
Claim 15
Dependent Claim
26 words
The improvement according to claim 12 wherein said sleeve-like member includes sides spaced from said valve lifter body for sliding engagement with said tappet guide means.
Claim 16
Dependent Claim
20 words
The improvement according to claim 13 wherein said sleeve-like member includes a constricted portion engaged with said valve lifter body.
Claim 17
Dependent Claim
23 words
The improvement according to claim 14 wherein said sleeve-like member includes connector mean detachably securing said sleeve-like member to said valve lifter body.
Claim 18
Dependent Claim
83 words
The improvement according to claim 15 wherein a portion of the sides of said sleeve-like member are depressed inwardly to form said constricted portion, said constricted portion including a pair of apertures therethrough said valve lifter body including a recessed opening in alignment with said apertures, said connector means comprising a generally C-shaped spring clip having an inturned ear on each end thereof said ears being inserted into said apertures and openings to detachably join said sleeve-like member to said valve lifter body.
Claim 19
Dependent Claim
62 words
A tappet guiding member comprising a tubular element having a top, bottom and sides; said top having an opening adapted to receive cam engaged self adjusting valve lifter body, said bottom having an opening for receiving a valve stem and valve spring; and means for securing said guiding member to a cam engaged self adjusting valve lifter body received within said opening.
Claim 20
Dependent Claim
62 words
A tappet guiding member comprising a tubular element having a top, bottom and sides; said top having an opening adapted to receive cam engaged self adjusting valve lifter body, said bottom having an opening for receiving a valve stem and valve spring; and means for securing said guiding member to a cam engaged self adjusting valve lifter body received within said opening.
Claim 21
Dependent Claim
82 words
The tappet guiding member according to claim 17 wherein the sides of said tubular element are spaced from said valve lifter body for sliding engaged with a tappet guide means to provide support for and movement of said valve lifter body in said tappet guide. 19 The tappet guiding member according to claim 18 where a portion of the sides of said member intermediate said top and bottom is depressed to form a constricted portion for engagement with said valve lifter body.
Claim 22
Dependent Claim
58 words
The tappet guiding member according to claim 19 wherein the top of said tubular element is turned inwardly to provide a flange in snug engagement with said valve lifter body, said flange being spaced axially with respect to said tubular element and valve lifter body from said constricted portion to provide positive support for said valve lifter body.
Claim 23
Dependent Claim
83 words
The tappet guiding member according to claim 19 wherein said means for securing said guiding member to a valve lifter body is comprised of a generally C-shaped sprIng having an inturned ear on each end thereof; said constricted portion including a pair of apertures therethrough; said valve lifter body including recessed opening in alignment with said apertures; and said inturned ears on said C-shaped spring clip being removably inserted into said apertures to detachably join said tubular member to said valve lifter body.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |