US3648325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double wheeled caster
Assignee: Stewart Warner Corp
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Filing: 1970-08-24
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Granted: 1972-03-14
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Expires: 1990-08-24
Abstract
Abstract The following specification describes a two-wheel caster in which the junctions between parts are camouflaged for improved appearance. Both wheels have a blind hole and are press fit on bushings. The bushings are rotatably secured on the respective end of a common shaft located between the two wheels by means of a respective C-ring engaged in a shaft groove. The shaft is cantilever supported in a radial wall between the wheels with the wall having a peripheral arcuate hood wall formed integral therewith and overlapping a large portion of the wheel periphery. The pintle stem is rotatably secured by means of a C-ring engaged in a stem groove in a boss having a blind hole or recess extending into the radial wall.
Inventors
- 👤 Robert S Cartwright
- 👤 Charles N Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:31
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0036; B60B33/0042; B60B33/0028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
295 words
A caster comprising a pair of spaced wheels each having an imperforate radial wall, an annular axial hub wall on each radial wall defining an axial first diameter recess spaced from said imperforate wall and terminating in a second smaller diameter recess defining a radial shoulder between each said first and second recesses, a bushing press fit in each first recess, a common horizontal shaft rotatably supporting each bushing with said shaft having tapered opposite ends engaged in a respective second recess and a groove between each shaft end and the adjacent bushing end, a C-ring fitted in each groove and located in the respective first wheel recess in abutment with a respective radial shoulder for limiting axial movement of a respective bushing toward the adjacent shaft end, a radial wall between said wheels with said shaft press fit in said wall, an arcuate hood wall integrally formed on the periphery of said radial wall and overlapping a portion of the periphery of said wheels for a distance exceeding 90*, a boss integrally formed on the periphery of said hood wall at a position offset from the axis of said shaft with said boss having a recess extending through said hood wall and into said radial wall along an axis perpendicular to and offset from the axis of said shaft, a rear wall for said boss recess, a pintle stem received in said boss recess with said pintle stem having a tapered end and a groove adjacent said end, and a C-ring received over said tapered end and seated in said pintle stem groove for engagement with the peripheral wall of said boss recess to hold said stem in said boss recess with said tapered end bearing against said rear wall of said boss recess.
Claim 2
Dependent Claim
295 words
A caster comprising a pair of spaced wheels each having an imperforate radial wall, an annular axial hub wall on each radial wall defining an axial first diameter recess spaced from said imperforate wall and terminating in a second smaller diameter recess defining a radial shoulder between each said first and second recesses, a bushing press fit in each first recess, a common horizontal shaft rotatably supporting each bushing with said shaft having tapered opposite ends engaged in a respective second recess and a groove between each shaft end and the adjacent bushing end, a C-ring fitted in each groove and located in the respective first wheel recess in abutment with a respective radial shoulder for limiting axial movement of a respective bushing toward the adjacent shaft end, a radial wall between said wheels with said shaft press fit in said wall, an arcuate hood wall integrally formed on the periphery of said radial wall and overlapping a portion of the periphery of said wheels for a distance exceeding 90*, a boss integrally formed on the periphery of said hood wall at a position offset from the axis of said shaft with said boss having a recess extending through said hood wall and into said radial wall along an axis perpendicular to and offset from the axis of said shaft, a rear wall for said boss recess, a pintle stem received in said boss recess with said pintle stem having a tapered end and a groove adjacent said end, and a C-ring received over said tapered end and seated in said pintle stem groove for engagement with the peripheral wall of said boss recess to hold said stem in said boss recess with said tapered end bearing against said rear wall of said boss recess.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |