Patent US3681838A successfully refreshed from Google Patents.
US3681838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve lifter tool
Assignee: Individual
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Filing: 1970-03-09
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Granted: 1972-08-08
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Expires: 1990-03-09
Abstract
Abstract A hydraulic valve lifter tool, for removing a hydraulic valve lifter from an automobile engine block, having a cylindrical hollow two-prong expander head with a pair of semi-circular grasping lips formed at the prong edges for insertion within the inner-face circumferential edge of the hydraulic valve lifter and wherein is located an internal expander cam plunger having a tapered cam surface which is pulled against the inner edge of the grasping lips of said expander head by an elongated rod handle for expanding its prong edge grasping lips radially outwardly within the inner face circumferential groove of the hydraulic valve lifter. The rod handle threadedly engaged to the cam plunger and including a locking collar having a hexagonal inner bore slidably coupled with the outer hexagonal configuration of the rod handle and which includes two opposed locking index keys longitudinally extending on each side of the rod for inseration within two of four key slots of the expander head. The rod includes a circular reduced diameter portion for rotation of the collar on the rod in aligning the index keys in the key slots. The tool includes an additional elongated hollow circular bore tube wrench sleeve that is interposed between the collar and the expander head and which sleeve has on one end two opposed locking index keys for insertion within two of the four expander head key slots and, on the other end, four key slots for receiving the index keys of the locking collar for extracting the hydraulic valve lifter from a fully enclosed automobile engine block.
Inventors
- 👤 Dominick J Tutino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:18
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/24; B25B27/02; B25B27/023; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53552; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53878
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
271 words
A hydraulic valve lifter tool for extracting a hydraulic valve lifter from an automobile engine block wherein said hydraulic valve lifter includes an inner-face circumferential edge, said tool comprising an expander head means, grasping lips formed at the edge of said expander head means for insertion within the inner-face circumferential edge of said hydraulic valve lifter, and attaching means operable for expanding the grasping lips of said expander head means radially outwardly within the inner-face circumferential edge of the hydraulic valve lifter in securely holding said valve lifter in an assembled state in the operation of extracting the valve lifter from the automobile engine block, wherein said attaching means is an internally expandable cam plunger having tapered camming surface and said tool further comprises an elongated rod handle threadedly engagable with said cam plunger whereby said rod handle is rotated to draw the camming surface of said cam plunger within said expander head for expanding the grasping lips of said expander head radially outwardly in grasping said valve lifter and whereby said rod handle is pulled to remove the hydraulic valve lifter from the engine block and wherein said rod handle is of an elongated hexagonal exterior configuration and said tool further comprises a locking collar having hexagonal interior bore for longitudinal engagement with said rod, locking index key means integral to said locking collar and key slots formed in said expander head engagable for locking said rod relative to said expander head through the hexagonal configuration of said rod and said collar in protecting the threadable engagement of said rod with said cam plunger, when said rod handle is pulled.
Claim 2
Dependent Claim
271 words
A hydraulic valve lifter tool for extracting a hydraulic valve lifter from an automobile engine block wherein said hydraulic valve lifter includes an inner-face circumferential edge, said tool comprising an expander head means, grasping lips formed at the edge of said expander head means for insertion within the inner-face circumferential edge of said hydraulic valve lifter, and attaching means operable for expanding the grasping lips of said expander head means radially outwardly within the inner-face circumferential edge of the hydraulic valve lifter in securely holding said valve lifter in an assembled state in the operation of extracting the valve lifter from the automobile engine block, wherein said attaching means is an internally expandable cam plunger having tapered camming surface and said tool further comprises an elongated rod handle threadedly engagable with said cam plunger whereby said rod handle is rotated to draw the camming surface of said cam plunger within said expander head for expanding the grasping lips of said expander head radially outwardly in grasping said valve lifter and whereby said rod handle is pulled to remove the hydraulic valve lifter from the engine block and wherein said rod handle is of an elongated hexagonal exterior configuration and said tool further comprises a locking collar having hexagonal interior bore for longitudinal engagement with said rod, locking index key means integral to said locking collar and key slots formed in said expander head engagable for locking said rod relative to said expander head through the hexagonal configuration of said rod and said collar in protecting the threadable engagement of said rod with said cam plunger, when said rod handle is pulled.
Claim 3
Dependent Claim
233 words
A hydraulic valve lifter tool for extracting a hydraulic valve lifter from an automobile engine block wherein said hydraulic valve lifter includes an inner-face circumferential edge said tool comprising an expander head means, grasping lips formed at the edge of said expander head means for insertion within the inner-face circumferential edge of said hydraulic valve lifter, and attaching means operable for expanding the grasping lips of said expander head means radially outwardly within the inner-face circumferential edge of the hydraulic valve lifter in securely holding said valve lifter in an assembled state in the operation of extracting the valve lifter from the automobile engine block, wherein said attaching means is an internally expandable cam plunger having tapered camming surface and said tool further comprises an elongated rod handle threadedly engagable with said cam plunger whereby said rod handle is rotated to draw the camming surface of said cam plunger within said expander head for expanding the grasping lips of said expander head radially outwardly in grasping said valve lifter and whereby said rod handle is pulled to remove the hydraulic valve lifter from the engine block, and wherein said rod handle includes a circular reduced diameter portion for rotation of said locking collar in aligning the index key means of said locking collar with the key slots of said expander head when said index key means is not aligned with said key slots.
Claim 4
Dependent Claim
233 words
A hydraulic valve lifter tool for extracting a hydraulic valve lifter from an automobile engine block wherein said hydraulic valve lifter includes an inner-face circumferential edge said tool comprising an expander head means, grasping lips formed at the edge of said expander head means for insertion within the inner-face circumferential edge of said hydraulic valve lifter, and attaching means operable for expanding the grasping lips of said expander head means radially outwardly within the inner-face circumferential edge of the hydraulic valve lifter in securely holding said valve lifter in an assembled state in the operation of extracting the valve lifter from the automobile engine block, wherein said attaching means is an internally expandable cam plunger having tapered camming surface and said tool further comprises an elongated rod handle threadedly engagable with said cam plunger whereby said rod handle is rotated to draw the camming surface of said cam plunger within said expander head for expanding the grasping lips of said expander head radially outwardly in grasping said valve lifter and whereby said rod handle is pulled to remove the hydraulic valve lifter from the engine block, and wherein said rod handle includes a circular reduced diameter portion for rotation of said locking collar in aligning the index key means of said locking collar with the key slots of said expander head when said index key means is not aligned with said key slots.
Claim 5
Dependent Claim
59 words
The structure of claim 2, wherein said expander head includes a slot longitudinally to the tool and said cam plunger includes a shear pin transversely to the tool and operable within the slot of said expander head in holding said cam in longitudinal alignment as said Rod handle is rotated in drawing said cam plunger into said expander head.
Claim 6
Dependent Claim
71 words
The structure of claim 3, wherein said expander head includes wrench flats at the circumferential ends of said grasping lips to be held by a wrench tool so as to operably permit the expansion of said lips radially outwardly as said rod handle is rotated to draw the cam plunger within said expander head in the tightening operation of said lips within the inner-face circumferential edge of the hydraulic valve lifter.
Claim 7
Dependent Claim
94 words
The structure of claim 2, further comprising a tube wrench sleeve longitudinally interposed on said rod between said locking collar and said expander head, said tube wrench sleeve including at one end key slots for cooperation with the locking index keys of said locking collar and on its opposite end, locking index keys for cooperation with the key slots of said expander head so as to provide for a longer tool in inserting within a fully enclosed engine block and operable without the engine block for removing the hydraulic valve lifter from said block.
Claim 8
Dependent Claim
70 words
The structure of claim 5, wherein said tube wrench sleeve includes wrench flats at its uppermost end portion to be held by a wrench tool so as to operably permit the expansion of said lips radially outwardly as said rod handle is rotated to draw the cam plunger within said expander head in the tightening operation of said lips within the inner face circumferential edge of the hydraulic valve lifter.
Claim 9
Dependent Claim
52 words
The structure of claim 3, further comprising an O-ring encircling said expander head between the ends of said prongs and said shear pin for contacting said shear pin and holding said cam plunger and said expander head assembled as one unit before the initial engagement of said rod with said cam plunger.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |