US3886808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine valve lifter guide
Assignee: Caterpillar Inc
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Filing: 1973-09-26
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Granted: 1975-06-03
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Expires: 1993-09-26
Abstract
Abstract A roller-type valve lifter is mounted in an internal combustion engine to reciprocate a push rod in response to rotation of an engine driven cam shaft. A guide and anti-rotation device for the valve lifter comprises a vertically-disposed leg which seats in a slot formed on the valve lifter and a pair of cylindrically shaped arms, extending horizontally from opposite edges of the leg, which seat in a circumferential groove also formed on the valve lifter. A hook, connected to an upper end of the leg by a reverse bend, seats in a bore formed in the cylinder block.
Inventors
- 👤 Robert L Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:37
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/06; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L2307/00; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A one-piece guide in combination with a spool member reciprocally mounted in a support member, said spool member having a first vertically disposed groove and a second circumferentially disposed groove formed thereon, said guide comprising a vertically disposed first guide portion disposed in said first groove, a pair of arcuately shaped second guide portions extending horizontally from opposite edges of said first guide portion and disposed in said second groove, and anti-rotation means for preventing rotation of said spool member relative to said support member.
Claim 2
Dependent Claim
85 words
A one-piece guide in combination with a spool member reciprocally mounted in a support member, said spool member having a first vertically disposed groove and a second circumferentially disposed groove formed thereon, said guide comprising a vertically disposed first guide portion disposed in said first groove, a pair of arcuately shaped second guide portions extending horizontally from opposite edges of said first guide portion and disposed in said second groove, and anti-rotation means for preventing rotation of said spool member relative to said support member.
Claim 3
Dependent Claim
33 words
The combination of claim 1 wherein said anti-rotation means comprises a third guide portion, connected to an upper end of said first guide portion, seated in a bore formed in said support member.
Claim 4
Dependent Claim
47 words
The combination of claim 1 wherein said third guide portion is connected to an upper end of said first guide portion at a reverse bend in said guide to position said second guide portions and said third guide portion on opposite sides of said first guide portion.
Claim 5
Dependent Claim
62 words
The combination of claim 3 wherein said first guide portion constitutes a single leg, said second guide portions constitute a pair of semicylindrically shaped arms having their ends spaced apart and said third guide portion constitutes a hook connected to the upper end of said leg at a reverse bend to position said arms and hook on opposite sides of said leg.
Claim 6
Dependent Claim
82 words
A one-piece guide in combination with a spool member reciprocally mounted in a support member, said spool member having a longitudinally disposed first guide means and a circumferentially disposed second guide means thereon, said guide comprising a first guide portion disposed in said first guide means, a pair of arcuately shaped second guidE portions extending from said first guide portion and disposed in said second guide means, and anti-rotation means for preventing rotation of said spool member relative to said support member.
Claim 7
Dependent Claim
82 words
A one-piece guide in combination with a spool member reciprocally mounted in a support member, said spool member having a longitudinally disposed first guide means and a circumferentially disposed second guide means thereon, said guide comprising a first guide portion disposed in said first guide means, a pair of arcuately shaped second guidE portions extending from said first guide portion and disposed in said second guide means, and anti-rotation means for preventing rotation of said spool member relative to said support member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |