US3662449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pliers
Assignee: Individual
•
Filing: 1970-03-30
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Granted: 1972-05-16
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Expires: 1990-03-30
Abstract
Abstract Pliers for contracting or expanding snap rings include pivotally connected handles spring biased apart. The handles are coupled to movable jaws by pivotable cam plates. The jaws are guided to move linearly toward and away from each other by parallel slide members. The cam plates carry slidable pins engaging first notches in the handles for moving the jaws apart when the handles are brought together. The pins can engage second notches in the handles for moving the jaws together when the handles are brought together. Other pins having stepped stem portions for engaging holes in ends of snap rings are carried by the jaws.
Inventors
- 👤 Seiichi Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:59
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/20; B25B27/205; C; C25; C25D; C25D13/00; C25D13/22; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T29/5363
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
Pliers comprising a pair of coplanar relatively movable jaws; first pins carried by the respective jaws and respectively engageable with holes in ends of a snap ring; a pair of parallel slide elements connecting the jaws so that the jaws are movable toward and away from each other linearly in the plane of the jaws, said slide elements being arranged at right angles to the pins and slidable linearly in the plane of the jaws; a pair of handles; pivot means pivotally connecting the handles; spring means interposed between the handles tending to bias the handles apart; a pair of cam plates pivotally secured to said pivot means, one end of each cam plate being coupled to a different one of the jaws; and slidable second pins coupling other ends of the cam plates to selective means on the handles respectively so that the jaws are coupled to the handles by the cam plates, and said jaws being movable toward or away from each other linearly in said plane depending on the positions of the slidable second pins with the selective means on the handles when the handles are moved toward each other.
Claim 2
Dependent Claim
193 words
Pliers comprising a pair of coplanar relatively movable jaws; first pins carried by the respective jaws and respectively engageable with holes in ends of a snap ring; a pair of parallel slide elements connecting the jaws so that the jaws are movable toward and away from each other linearly in the plane of the jaws, said slide elements being arranged at right angles to the pins and slidable linearly in the plane of the jaws; a pair of handles; pivot means pivotally connecting the handles; spring means interposed between the handles tending to bias the handles apart; a pair of cam plates pivotally secured to said pivot means, one end of each cam plate being coupled to a different one of the jaws; and slidable second pins coupling other ends of the cam plates to selective means on the handles respectively so that the jaws are coupled to the handles by the cam plates, and said jaws being movable toward or away from each other linearly in said plane depending on the positions of the slidable second pins with the selective means on the handles when the handles are moved toward each other.
Claim 3
Dependent Claim
85 words
Pliers as defined in claim 1, wherein said selective means includes a first group of spaced notches is formed in the handles for engagement by the sliding second pins so that the jaws move toward each other when the handles are moved toward each other, and a second group of spaced notches formed in the handles for engagement by the sliding second pins, so that the jaws move away from each other when the handles are moved toward each other for expanding the snap ring.
Claim 4
Dependent Claim
44 words
Pliers as defined in claim 1, wherein each of the first pins comprises a plurality of stem portions of different diameters varying stepwise, so that each stem portion will fit snugly in an opening of different diameter in an end of a snap ring.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |