Patent US2918160A successfully refreshed from Google Patents.
Patent US4135284A successfully refreshed from Google Patents.
US4135284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for mounting retaining rings on a shaft
Assignee: IWATA ELECTRIC WORKS Ltd
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Filing: 1977-11-22
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Granted: 1979-01-23
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Expires: 1997-11-22
Abstract
Abstract Disclosed is a hand tool for mounting and removing split retaining rings on a shaft consisting of plier-like grip handles pivoted on a base plate, said base plate having a hole therethrough to accommodate the shaft. An abutment means is provided on the end of the base plate adjacent the hole and a moveable camming device faces the abutment means on the opposite side of the hole. The retaining ring is gripped between the abutment means and the camming device, and the ring is expanded to accommodate the shaft by the movement of the camming device into the split of the ring and toward the abutment means.
Inventors
- 👤 Yakayuki Nakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:04
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/20; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T29/5363
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
A tool for mounting and demounting split retaining rings comprising a base plate, a pair of gripping levers pivotally mounted on one end of said base plate, the other end of said base plate being elongated and having a shaft accommodating hole passing therethrough, an abutment means protruding from one side of said elongated end of said base plate between said hole and the end of said elongated end, and a moveable camming means positioned in a slot-like portion of said hole and projecting in the same direction as said abutment member, and means connecting said gripping levers with said camming means so that squeezing said gripping means causes said camming means to be actuated toward said abutment means whereby a split retaining ring held between said camming means and said abutment means may be expanded to be mounted or demounted on a shaft.
Claim 2
Dependent Claim
144 words
A tool for mounting and demounting split retaining rings comprising a base plate, a pair of gripping levers pivotally mounted on one end of said base plate, the other end of said base plate being elongated and having a shaft accommodating hole passing therethrough, an abutment means protruding from one side of said elongated end of said base plate between said hole and the end of said elongated end, and a moveable camming means positioned in a slot-like portion of said hole and projecting in the same direction as said abutment member, and means connecting said gripping levers with said camming means so that squeezing said gripping means causes said camming means to be actuated toward said abutment means whereby a split retaining ring held between said camming means and said abutment means may be expanded to be mounted or demounted on a shaft.
Claim 3
Dependent Claim
29 words
The tool of claim 1, wherein said base plate is angled so that said gripping levers angle away from the side of said base plate having said abutment means.
Claim 4
Dependent Claim
30 words
The tool of claim 1, wherein said elongated end of said base plate is at substantially a right angle to the end of said base plate carrying said gripping levers.
Claim 5
Dependent Claim
26 words
The tool of claim 1, wherein said camming means has a wedge-shped portion to enter the split of said ring and expand the ring upon actuation.
Claim 6
Dependent Claim
28 words
The tool of claim 1, wherein said means connecting said gripping levers with said camming means is a rod carried in a guide formed along said base plate.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |