US3683658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller-type expander tool
Assignee: Irontite Products Co Inc
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Filing: 1970-08-19
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Granted: 1972-08-15
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Expires: 1990-08-19
Abstract
Abstract A roller-type expander tool having at its forward end a forwardly convergent array of circumferentially spaced rollers, and having rearwardly of such forwardly convergent array a substantially cylindrical array of circumferentially spaced rollers capable of radially outward expansion.
Inventors
- 👤 Ronald C Roeschlaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:21
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10; B21D39/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
191 words
In a roller-type expander tool, the combination of: a. a tool body having axially spaced forward and rearward ends; b. a forwardly convergent array of circumferentially spaced rollers carried by said tool body adjacent its forward end; c. a substantially cylindrical array of circumferentially spaced rollers carried by said tool body adjacent its rearward end; d. means mounting said rollers of said substantially cylindrical array on said tool body for radially inward and outward movement so as to provide for radially outward expansion of said substantially cylindrical array; e. expander means for radially expanding said substantially cylindrical array; f. said expander means comprising an axially movable expander member having adjacent its forward end forwardly convergent cam means insertable into said substantially cylindrical array to radially expand same in response to forward movement of said expander member; and g. said tool body having the configuration of a rearwardly facing cup and having a coaxial, rearwardly extending stem connected thereto with its forward end within said cup, said expander member having an axial bore axially slidably receiving said stem therein and the forward end of said expander member being disposed within said cup.
Claim 2
Dependent Claim
191 words
In a roller-type expander tool, the combination of: a. a tool body having axially spaced forward and rearward ends; b. a forwardly convergent array of circumferentially spaced rollers carried by said tool body adjacent its forward end; c. a substantially cylindrical array of circumferentially spaced rollers carried by said tool body adjacent its rearward end; d. means mounting said rollers of said substantially cylindrical array on said tool body for radially inward and outward movement so as to provide for radially outward expansion of said substantially cylindrical array; e. expander means for radially expanding said substantially cylindrical array; f. said expander means comprising an axially movable expander member having adjacent its forward end forwardly convergent cam means insertable into said substantially cylindrical array to radially expand same in response to forward movement of said expander member; and g. said tool body having the configuration of a rearwardly facing cup and having a coaxial, rearwardly extending stem connected thereto with its forward end within said cup, said expander member having an axial bore axially slidably receiving said stem therein and the forward end of said expander member being disposed within said cup.
Claim 3
Dependent Claim
20 words
An expander tool according to claim 1 including means keying said eXpander member and said stem together against relative rotation.
Claim 4
Dependent Claim
33 words
An expander tool as defined in claim 2 including spring means in said bore and engaging said stem and said expander member for biasing said expander member rearwardly relative to said tool body.
Claim 5
Dependent Claim
18 words
An expander tool according to claim 3 including a coaxial, rearwardly extending driving stem on said expander member.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |