US3859969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping pushrod tube
Assignee: DAVIS GEORGE B JUN
•
Filing: 1973-07-30
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Granted: 1975-01-14
•
Expires: 1993-07-30
Abstract
Abstract A pushrod tube and particularly an improvement in a pushrod tube of the type adapted specifically for use with a horizontal air cooled engine as commonly used in Volkswagens and serves to extend between the block and head to inclose individually each of the pushrods that operate the valves of the engine by rotation of the cam shaft.
Inventors
- 👤 Jr George B Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:40
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/146; F01L1/46; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2147
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A pushrod inclosure of the tubular telescoping type including in combination, a pair of telescoping members, comprising an outer telescoping member and an inner telescoping member movable with respect to each other upon a common longitudinal axis, said telescoping members having a bearing surface bearing against each other as they move longitudinally along said axis, external flanges inwardly spaced from the outer or free ends of said telescoping members, annular gaskets arranged over the free ends of said telescoping members and operative in use to bear against said flanges to provide an oil seal therebetween and the free ends of said telescoping members, said inner telescoping member having a diametrically reduced inner tubular portion to form therebetween and said outer telescoping member on annular recess, gasket means arranged within said recess, spring means interposed between said gasket means and said outer telescoping member and operative in use to compress said gasket means in oil sealing relation between said telescoping members while urging the said telescoping members in opposite directions along said longitudinal axis.
Claim 2
Dependent Claim
173 words
A pushrod inclosure of the tubular telescoping type including in combination, a pair of telescoping members, comprising an outer telescoping member and an inner telescoping member movable with respect to each other upon a common longitudinal axis, said telescoping members having a bearing surface bearing against each other as they move longitudinally along said axis, external flanges inwardly spaced from the outer or free ends of said telescoping members, annular gaskets arranged over the free ends of said telescoping members and operative in use to bear against said flanges to provide an oil seal therebetween and the free ends of said telescoping members, said inner telescoping member having a diametrically reduced inner tubular portion to form therebetween and said outer telescoping member on annular recess, gasket means arranged within said recess, spring means interposed between said gasket means and said outer telescoping member and operative in use to compress said gasket means in oil sealing relation between said telescoping members while urging the said telescoping members in opposite directions along said longitudinal axis.
Claim 3
Dependent Claim
26 words
A pushrod inclosure as claimed in claim 1 wherein the external flanges are disposed in predetermined spaced relation inwardly from the outer ends of said inclosure.
Claim 4
Dependent Claim
22 words
A pushrod inclosure as claimed in claim 2 wherein outwardly from said flanges the ends of the inclosure diminishes gradually in diameter.
Claim 5
Dependent Claim
23 words
A pushrod inclosure as claimed in claim 1 wherein the ends of said inclosure are reduced in diameter to receive thereover annular gaskets.
Claim 6
Dependent Claim
29 words
A pushrod inclosure as claimed in claim 1 wherein the annular gasket retaining recess formed between the two telescoping members exceeding in length the thickness of said gasket means.
References Cited (Backward Citations)
US1977778A
Cited
US2002982A
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US2602662A
Cited
US2956796A
Cited
US2858817A
Cited
US3194370A
Cited
US3752461A
Cited
US3677561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |