Patent US3764228A successfully refreshed from Google Patents.
US3764228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable blade propeller assembly
Assignee: Individual
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Filing: 1971-10-04
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Granted: 1973-10-09
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Expires: 1991-10-04
Abstract
Abstract The disclosure teaches a novel means for detachably mounting blades on a propeller hub. The blades can be assembled on the hub, and blade replacements can be made, following simple instructions and without special training. The novel structure has various advantages which are also disclosed.
Inventors
- 👤 F Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:38
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A replaceable blade propeller assembly for use with marine engines which comprises a hollow elongate hub, an outer cylinder comprising a plurality of interchangeable arcuate blade-bearing bases, means for preventing rotational movement of said bases relative said hub, means for preventing longitudinal movement of said bases relative said hub comprising mortised flanges disposed on said hub longitudinally spaced to receive the ends of said bases, tenons on said bases adapted to engage said flanges, at least one of said flanges comprising a freely moveable compression ring, a retainer nut, means for adjusting said retainer nut to position said compression ring to define close tolerances between said tenons and mortises and to prevent galling of the threads of said nut and hub comprising threaded engagement between said hub and said nut, a plurality of spaced scallops formed in the inside perimeter of said retainer nut, at least one semi-circular counter bore complementary to said scallops formed in the end of said hub, said scallops and counter bore adapted to register successively upon incremental turns of said retainer nut, and an anti-rotation lug adapted to threadedly engage said counter bore and to lock said nut by occupying a scallop registered with said counter bore.
Claim 2
Dependent Claim
202 words
A replaceable blade propeller assembly for use with marine engines which comprises a hollow elongate hub, an outer cylinder comprising a plurality of interchangeable arcuate blade-bearing bases, means for preventing rotational movement of said bases relative said hub, means for preventing longitudinal movement of said bases relative said hub comprising mortised flanges disposed on said hub longitudinally spaced to receive the ends of said bases, tenons on said bases adapted to engage said flanges, at least one of said flanges comprising a freely moveable compression ring, a retainer nut, means for adjusting said retainer nut to position said compression ring to define close tolerances between said tenons and mortises and to prevent galling of the threads of said nut and hub comprising threaded engagement between said hub and said nut, a plurality of spaced scallops formed in the inside perimeter of said retainer nut, at least one semi-circular counter bore complementary to said scallops formed in the end of said hub, said scallops and counter bore adapted to register successively upon incremental turns of said retainer nut, and an anti-rotation lug adapted to threadedly engage said counter bore and to lock said nut by occupying a scallop registered with said counter bore.
Claim 3
Dependent Claim
30 words
The device of claim 1 with an addition of a resiliently deformable O-ring and means for retaining said O-ring in operative relationship between a said flange and a said base.
Claim 4
Dependent Claim
168 words
A replaceable blade propeller assembly for use with marine engines which comprises a hollow elongate hub, an outer cylinder comprising a plurality of interchangeable arcuate blade-bearing bases, means for preventing rotational movement of said bases relative said hub comprising radially extending shoulders longitudinally disposed along said hub, said arcuate bases of said blades having means defining channels in the concave surface of said base along the longitudinal edges thereof, said channels cooperating to receive, closely fit and be supported by said radially extending shoulders, thereby defining a plurality of conduits in cooperation with said shoulders in said hub, means for preventing longitudinal movement of said bases relative to said hub comprising mortised flanges disposed on said hub longitudinally spaced to receive the ends of said bases, tenons on said bases adapted to engage said flanges, At least one of said flanges comprising a longitudinally adjustable retainer nut, adapted to threadably engage an end of said hub, and means for retaining said flanges in threaded engagement with said hub.
Claim 5
Dependent Claim
168 words
A replaceable blade propeller assembly for use with marine engines which comprises a hollow elongate hub, an outer cylinder comprising a plurality of interchangeable arcuate blade-bearing bases, means for preventing rotational movement of said bases relative said hub comprising radially extending shoulders longitudinally disposed along said hub, said arcuate bases of said blades having means defining channels in the concave surface of said base along the longitudinal edges thereof, said channels cooperating to receive, closely fit and be supported by said radially extending shoulders, thereby defining a plurality of conduits in cooperation with said shoulders in said hub, means for preventing longitudinal movement of said bases relative to said hub comprising mortised flanges disposed on said hub longitudinally spaced to receive the ends of said bases, tenons on said bases adapted to engage said flanges, At least one of said flanges comprising a longitudinally adjustable retainer nut, adapted to threadably engage an end of said hub, and means for retaining said flanges in threaded engagement with said hub.
Claim 6
Dependent Claim
30 words
The device of claim 3 with the addition of a resiliently deformable O-ring and means for retaining said O-ring in operative relationship between a said flange and a said base.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |