US3602074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable, self-aligning joint for pliers, shears and the like
Assignee: Rocky Mountain Dental Products Co
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Filing: 1968-06-05
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Granted: 1971-08-31
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Expires: 1988-06-05
Abstract
Abstract A tool including a pair of members mounted for relative rotation with respect to each other about a pivot column in which said pivot column is nonfrictionally, rigidly mounted with respect to one of said members and rotatably mounted with respect to the other of said members and in which said pivot column and said members include means for maintaining one of said members in a predetermined pivotal relationship with the other said member during operation thereof.
Inventors
- 👤 Eugene F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:50
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/06; B25B7/08; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32951
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
404 words
A controllable torque, pivotal joint suitable for use in a tool formed of a pair of longitudinal members that include handles at one end and tool elements at the other end, the pair of longitudinal members being pivotably joined intermediate their ends, said controllable torque, pivotal joint comprising: A first frustoconically shaped bore, including at least one internal outwardly projecting recess, formed in one of said pair of longitudinal members; a second frustoconically shaped bore formed in the other of said pair of longitudinal members, the longitudinal axes of said first and second frustoconically shaped bores being concentrically disposed with respect to one another, said first and second frustoconically shaped bores being formed so that their smaller ends face one another when said pair of longitudinal members are pivotably joined; a frustoconically shaped screw mounted in said first frustoconically shaped bore, said frustoconically shaped screw including an undercut threaded stud formed along the longitudinal axis of said first frustoconically shaped bore and projecting into said second frustoconically shaped bore along the longitudinal axis thereof; and, a frustoConically shaped nut mounted in said second frustoconically shaped bore for rotation with respect to said second frustoconically shaped bore, said frustoconically shaped nut including at least one boss formed so as to fit into said at least one outwardly projecting recess in said first frustoconically shaped bore so as to prevent rotational movement of said frustoconically shaped nut with respect to said first frustoconically shaped bore, said frustoconically shaped nut including a threaded aperture formed along the longitudinal axis of said second frustoconically shaped bore, the threaded stud portion of said frustoconically shaped screw being screwed into said threaded aperture in said frustoconically shaped nut so as to maintain said pair of longitudinal members in pivotal relation with respect to one another, the surface of said frustoconically shaped nut facing toward said first frustoconically shaped bore and the frustoconically shaped portion of said frustoconically shaped screw being separated from said first frustoconically shaped bore and the frustoconically shaped portion of said frustoconically shaped screw so that the only contacting surface between said frustoconically shaped nut and said frustoconically shaped screw is the threaded region where said frustoconically shaped screw is screwed into said frustoconically shaped nut whereby the torque at said pivotal joint is controlled by the amount of thread of said frustoconically shaped screw that is screwed into said threaded aperture in said frustoconically shaped nut.
Claim 2
Dependent Claim
404 words
A controllable torque, pivotal joint suitable for use in a tool formed of a pair of longitudinal members that include handles at one end and tool elements at the other end, the pair of longitudinal members being pivotably joined intermediate their ends, said controllable torque, pivotal joint comprising: A first frustoconically shaped bore, including at least one internal outwardly projecting recess, formed in one of said pair of longitudinal members; a second frustoconically shaped bore formed in the other of said pair of longitudinal members, the longitudinal axes of said first and second frustoconically shaped bores being concentrically disposed with respect to one another, said first and second frustoconically shaped bores being formed so that their smaller ends face one another when said pair of longitudinal members are pivotably joined; a frustoconically shaped screw mounted in said first frustoconically shaped bore, said frustoconically shaped screw including an undercut threaded stud formed along the longitudinal axis of said first frustoconically shaped bore and projecting into said second frustoconically shaped bore along the longitudinal axis thereof; and, a frustoConically shaped nut mounted in said second frustoconically shaped bore for rotation with respect to said second frustoconically shaped bore, said frustoconically shaped nut including at least one boss formed so as to fit into said at least one outwardly projecting recess in said first frustoconically shaped bore so as to prevent rotational movement of said frustoconically shaped nut with respect to said first frustoconically shaped bore, said frustoconically shaped nut including a threaded aperture formed along the longitudinal axis of said second frustoconically shaped bore, the threaded stud portion of said frustoconically shaped screw being screwed into said threaded aperture in said frustoconically shaped nut so as to maintain said pair of longitudinal members in pivotal relation with respect to one another, the surface of said frustoconically shaped nut facing toward said first frustoconically shaped bore and the frustoconically shaped portion of said frustoconically shaped screw being separated from said first frustoconically shaped bore and the frustoconically shaped portion of said frustoconically shaped screw so that the only contacting surface between said frustoconically shaped nut and said frustoconically shaped screw is the threaded region where said frustoconically shaped screw is screwed into said frustoconically shaped nut whereby the torque at said pivotal joint is controlled by the amount of thread of said frustoconically shaped screw that is screwed into said threaded aperture in said frustoconically shaped nut.
Claim 3
Dependent Claim
45 words
A pivotal joint suitable for use in a tool as claimed in claim 1 including a hollow, frustoconically shaped bushing formed from a material having a low coefficient of friction, said bushing being disposed between said frustoconically shaped nut and said second frustoconically shaped bore.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |