Patent US3609060A successfully refreshed from Google Patents.
US3609060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller
Assignee: Individual
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Filing: 1969-07-14
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Granted: 1971-09-28
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Expires: 1989-07-14
Abstract
Abstract A hub having an enlarged midsection and tapered forward and rearward portions is adapted to be attached to a propeller drive shaft. A plurality of outwardly extending arm members support a plurality of curved blades in a spaced-apart manner from the hub. The blades are positioned for squeezing water inwardly toward the rotational axis of the propeller during rotation of the propeller for increasing the water pressure adjacent the rearward portion of the hub for producing a desired forward thrust for the propeller.
Inventors
- 👤 Alberto Angel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:54
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A marine propeller comprising: hub means having an enlarged midsection and tapered forward and rearward portions; means for coupling the hub means to the marine vessel to be propelled so that water may freely flow over the hub means from the forward end to the rearward end thereof; blade means spaced laterally of the rearward portion of the hub means; means for rotating the blade means around an axis coaxial with the longitudinal axis of the hub means; and the blade means being shaped to cause an inward squeezing of the water as it flows past the rearward portion of the hub means for increasing the water pressure on the rearward portion of the hub means.
Claim 2
Dependent Claim
116 words
A marine propeller comprising: hub means having an enlarged midsection and tapered forward and rearward portions; means for coupling the hub means to the marine vessel to be propelled so that water may freely flow over the hub means from the forward end to the rearward end thereof; blade means spaced laterally of the rearward portion of the hub means; means for rotating the blade means around an axis coaxial with the longitudinal axis of the hub means; and the blade means being shaped to cause an inward squeezing of the water as it flows past the rearward portion of the hub means for increasing the water pressure on the rearward portion of the hub means.
Claim 3
Dependent Claim
108 words
A marine propeller comprising: a hub having an enlarged midsection and tapered forward and rearward portions; a propeller shaft for coupling the hub to the marine vessel to be propelled and for spacing the hub apart from the hull of the vessel so that water may freely flow over the hub from the forward end to the rearward end thereof; a plurality of curved blades; and support means for spacing the blades laterally of the rearward portion of the hub with the concave sides of the blades facing the hub and positioned for squeezing water inwardly toward the rearward portion of the hub during rotation of the propeller.
Claim 4
Dependent Claim
108 words
A marine propeller comprising: a hub having an enlarged midsection and tapered forward and rearward portions; a propeller shaft for coupling the hub to the marine vessel to be propelled and for spacing the hub apart from the hull of the vessel so that water may freely flow over the hub from the forward end to the rearward end thereof; a plurality of curved blades; and support means for spacing the blades laterally of the rearward portion of the hub with the concave sides of the blades facing the hub and positioned for squeezing water inwardly toward the rearward portion of the hub during rotation of the propeller.
Claim 5
Dependent Claim
30 words
A marine propeller in accordance with claim 2 wherein the shape of the hub corresponds to a pair of conical forms having a common base and pointing in opposite directions.
Claim 6
Dependent Claim
21 words
A marine propeller in accordance with claim 2 wherein the curvature of each blade corresponds to a portion of a spiral.
Claim 7
Dependent Claim
26 words
A marine propeller in accordance with claim 2 wherein the support means comprises a plurality of angularly spaced arm members which extend outwardly from the hub.
Claim 8
Dependent Claim
21 words
A marine propeller in accordance with clam 5 wherein the arm members are attached to forward portions of the curved blades.
Claim 9
Dependent Claim
21 words
A marine propeller in accordance with clam 5 wherein the arm members are attached to forward portions of the curved blades.
Claim 10
Dependent Claim
28 words
A marine propeller in accordance with claim 6 wherein the arm members are cocked at an angle so as to urge movement of water in the rearward direction.
Claim 11
Dependent Claim
83 words
A marine propeller in accordance with claim 2 wherein: the shape of the hub corresponds to a pair of conical forms having a common base and pointing in opposite directions; each blade is in the form of a curved plate; the blades are positioned to encircle the rearward portion of the hub in an overlapping manner; and the support means comprises a plurality of angularly spaced arm members which extend outwardly from the hub and are attached to forward portions of the blades.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |