US4292719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine valve lifter service tool
Assignee: Individual
•
Filing: 1979-12-26
•
Granted: 1981-10-06
•
Expires: 1999-12-26
Abstract
Abstract An engine service tool assembly (10) for removing defective hydraulic valve lifters (15) from an engine (16) and installing new lifters includes an actuating portion (11), a lifter engaging portion (12) and an intermediate elongated flexible housing portion (13). Present methods of removing defective hydraulic valve lifters consist of disassembly of several major engine components. The subject tool assembly (10) provides for easy removal and installation of hydraulic valve lifters with removal of minimal engine components.
Inventors
- 👤 Francis D. Britton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:03
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/24; B25B27/0035; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49233; Y10T29/53; Y10T29/53552; Y10T29/53909; Y10T29/53943; Y10T29/53952
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A tool assembly (10) for removing an hydraulic valve lifter (15) from an engine (16) and installing an hydraulic valve lifter (15) in said engine (16) comprising: an actuating portion (11) including a housing member (29) and a piston member (30) adapted to move into and out of said housing member (29); a valve lifter engaging portion (12); a flexible portion (13) intermediate said actuating portion (11) and said engaging portion (12); biasing means (14) enclosed within said housing member (29) for urging said engaging portion (12) into engagement with said valve lifter (15); and said piston member (30) containing a travel slot (32) and a detent (33), said travel slot (32) limiting the travel of said piston (30) and said detent (33) locking said piston (30) to said housing member (29).
Claim 2
Dependent Claim
132 words
A tool assembly (10) for removing an hydraulic valve lifter (15) from an engine (16) and installing an hydraulic valve lifter (15) in said engine (16) comprising: an actuating portion (11) including a housing member (29) and a piston member (30) adapted to move into and out of said housing member (29); a valve lifter engaging portion (12); a flexible portion (13) intermediate said actuating portion (11) and said engaging portion (12); biasing means (14) enclosed within said housing member (29) for urging said engaging portion (12) into engagement with said valve lifter (15); and said piston member (30) containing a travel slot (32) and a detent (33), said travel slot (32) limiting the travel of said piston (30) and said detent (33) locking said piston (30) to said housing member (29).
Claim 3
Dependent Claim
46 words
A tool assembly (10), as claimed in claim 1, wherein said valve lifter engaging portion (12) includes an elongated member (38) having a first end and a second end, said first end (40) having a stop (39) and said second end (12) forming a loop (12).
Claim 4
Dependent Claim
38 words
A tool assembly (10), as claimed in claim 1, including an elongated leader member (21) having a first end (22) and a second end (23), said first end (22) being engaged with said valve lifter engaging portion (12).
Claim 5
Dependent Claim
34 words
A tool assembly (10), as claimed in claim 1, including a guide pin (42) associated with said housing member (29) for guiding said movement of said piston member (30) within said housing member (29).
Claim 6
Dependent Claim
39 words
A tool assembly (10), as claimed in claim 1, wherein said piston member (30) includes means (35) for engaging said biasing means (14) and compressing said biasing means (14) as said piston (30) moves into said housing member (29).
Claim 7
Dependent Claim
34 words
A tool assembly (10), as claimed in claim 1, including a hook member (24) having a first end (25) having a handle portion (26) and a second end (27) having a hook portion (28).
Claim 8
Dependent Claim
27 words
A tool assembly (10), as claimed in claim 2, wherein said elongated member (38) includes an intermediate portion and said flexible portion (13) enclosed said intermediate portion.
Claim 9
Dependent Claim
24 words
A tool assembly (10), as claimed in claim 3, wherein said leader member (21) is slideably engaged with said valve lifter engaging portion (12).
Claim 10
Independent Claim
173 words
A method of removing a defective hydraulic valve lifter (15) from an engine (16) and installing a new lifter (15) in said engine (16) comprising the steps of: providing a valve lifter service tool (10) having a valve lifter engaging portion (12) and an actuating portion (11); inserting said service tool (10) into the distributor opening (20) of said engine (16); encircling said defective lifter (15) with said engaging portion (12); actuating said actuating portion (11) to engage said defective lifter (15) with said engaging portion (12); removing said service tool (10) and said defective lifter (15) from said engine (16) through said opening (20); removing said defective lifter (15) from said engaging portion (12); installing a new lifter (15) in said engaging portion (12); inserting said service tool (10) and said new lifter (15) into said opening (20); p1 installing said new lifter (15) into position within said engine (16) using said tool (10); releasing said new lifter (15) from said tool (10); and removing said tool (10) from said opening (20).
Claim 11
Independent Claim
173 words
A method of removing a defective hydraulic valve lifter (15) from an engine (16) and installing a new lifter (15) in said engine (16) comprising the steps of: providing a valve lifter service tool (10) having a valve lifter engaging portion (12) and an actuating portion (11); inserting said service tool (10) into the distributor opening (20) of said engine (16); encircling said defective lifter (15) with said engaging portion (12); actuating said actuating portion (11) to engage said defective lifter (15) with said engaging portion (12); removing said service tool (10) and said defective lifter (15) from said engine (16) through said opening (20); removing said defective lifter (15) from said engaging portion (12); installing a new lifter (15) in said engaging portion (12); inserting said service tool (10) and said new lifter (15) into said opening (20); p1 installing said new lifter (15) into position within said engine (16) using said tool (10); releasing said new lifter (15) from said tool (10); and removing said tool (10) from said opening (20).
References Cited (Backward Citations)
US643673A
Cited
US1724435A
Cited
US2072391A
Cited
US2207888A
Cited
US3145463A
Cited
US3174216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |