Patent US3661024A successfully refreshed from Google Patents.
US3661024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable driving wheels
Assignee: Triplite Ltd
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Filing: 1970-06-15
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Granted: 1972-05-09
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Expires: 1990-06-15
Abstract
Abstract An adjustable driving wheel comprises a central holder having a variable diameter wheel periphery provided by blocks slidable on pairs of parallel rods radiating from the central Holder at uniformly spaced intervals around it, the blocks being movable simultaneously inwardly and outwardly by means of a rotary cam positioned at one side of the wheel.
Inventors
- 👤 Albert Edward Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:23
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
An adjustable driving wheel comprising in combination a central holder, pairs of parallel rods connected to and projecting radially from said holder at positions spaced uniformly around it, a set of blocks slidably mounted one on each pair of the rods and together forming a skeleton periphery of the wheel, and cam means positioned alongside said blocks and movable rotatably for moving the blocks simultaneously radially inwardly and outwardly of the wheel axis to vary its effective diameter, said cam means comprising a cam disc at one side of the wheel, spirally arranged slots formed in the cam disc, the slots corresponding in number to the number of adjustable blocks and being spaced apart in similar arrangements around the axis of the disc, with each of said slots engaging a projection on its corresponding block.
Claim 2
Dependent Claim
135 words
An adjustable driving wheel comprising in combination a central holder, pairs of parallel rods connected to and projecting radially from said holder at positions spaced uniformly around it, a set of blocks slidably mounted one on each pair of the rods and together forming a skeleton periphery of the wheel, and cam means positioned alongside said blocks and movable rotatably for moving the blocks simultaneously radially inwardly and outwardly of the wheel axis to vary its effective diameter, said cam means comprising a cam disc at one side of the wheel, spirally arranged slots formed in the cam disc, the slots corresponding in number to the number of adjustable blocks and being spaced apart in similar arrangements around the axis of the disc, with each of said slots engaging a projection on its corresponding block.
Claim 3
Dependent Claim
49 words
A driving wheel according to claim 1, wherein the outer end parts of the rods in each pair of parallel rods project beyond the radially adjustable blocks to receive a band, tape or the like between them extending partly round the wheel against the outer faces of the blocks.
Claim 4
Dependent Claim
36 words
A driving wheel according to claim 2 having side guards provided by said cam disc of the cam means on one side of the wheel and a plain disc at the other side of the wheel.
Claim 5
Dependent Claim
39 words
A driving wheel according to claim 1 wherein the projections on the blocks are formed by spring loaded pins with tapered ends which are each urged resiliently into engagement with both sides of its corresponding in the cam disc.
Claim 6
Dependent Claim
34 words
A driving wheel according to claim 1 having the cam disc formed peripherally with gear teeth for engagement by a spur gear to effect adjustment of the disc rotationally with respect to the blocks.
Claim 7
Dependent Claim
86 words
A driving wheel according to claim 1 having first and second discs attached to the central holder on opposite sides thereof, and having the cam disc as a third disc mounted to turn relatively to the holder about the axis thereof and positioned between said second disc and the holder and blocks, and having a stub-spindle rotatably mounted on the said second disc at the periphery thereof, and a spur gear fixed to said stub spindle and engaging with the gear teeth on the cam disc.
Claim 8
Dependent Claim
49 words
A driving wheel according to claim 1 wherein each of said blocks is formed with a hole to slide on one of its two parallel rods and formed with a slot extending to the adjacent side of the block to slide freely on the other of its parallel rods.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |