US 4,871,332 AGranted

Naval propulsion plant with hydraulic transmission

AssigneeNautical Propulsion Research Limited

InventorRiccardo Rodriquez

Life of this patent

Estimating the term…

Abstract

A naval propulsion plant that provides a pair of heat engines MT1 and MT2 that drive two independent pumps P1 and P2. In turn these pumps drive two hydraulic motors MR1 and MR2 with which two propellers E1 and E2 are solid in rotation. A suitable distributor 40 makes it possible to idle one of the two propellers in case of a breakdown, or to operate both with one of the heat engines.

Claims5

Dependent claims

Naval propulsion plant comprised of:

(a) a main engine,
(b) a pump operated by said main engine,
(c) a naval propulsor driven by said pump, said naval propulsor including a single propeller, and
(d) a hydraulic flow circuit connecting said pump and said naval propulsor,
with each said main engine, pump, hydraulic circuit and naval propulsor being present in pairs capable of independent operation, with said single propellers of said paired naval propulsors consisting of contrarotating propellers in relation to each other, and
(e) a hydraulic flow distributor positioned between said respective pairs of pumps and naval propulsors and common to each said hydraulic circuit, said hydraulic flow distributor including means to maintain independent operation of each said hydraulic circuit as well as to connect either of said pumps with both of said naval propulsors,
said propulsion plant comprising two parallel and symmetrical units, each formed by one said main engine, one said pump, a hydraulic motor and one said propeller,
wherein said propellers, driven by said hydraulic motors, are mounted on a support, and further including means for rotation of said support about a horizontal axis and means for rotation of said support about a vertical axis, and wherein each said hydraulic motor and each respective driven propeller are mounted on said support by at least a pair of elastic supports able to absorb the radial and axial forces developed by said propellers.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/235,732Filed 22 Aug 1988 · continuation
Priority: IT 12475 A/8612 May 1986
Granted: 3 Oct 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B63H 5/10
Of more than one propeller: of coaxial type, e.g. of counter-rotative type
B63H 20/106
Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt: means enabling lifting of…
B63H 20/22
Transmission between propulsion power unit and propulsion element: allowing movement of the propulsion element about at least a horizontal axis…
B63H 21/165
The vessels being motor-driven: by hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised to rotate the propelling means

Family

Serial48,910Parent of this continuation · filed 12 May 1987
US 4,871,332 AThis patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

Facts

Application

07/235,732Filed 22 Aug 1988 · continuation

Priority

IT 12475 A/8612 May 1986

Granted

3 Oct 1989

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

B63H 5/10
Of more than one propeller: of coaxial type, e.g. of counter-rotative type
B63H 20/106
Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt: means enabling lifting of…
B63H 20/22
Transmission between propulsion power unit and propulsion element: allowing movement of the propulsion element about at least a horizontal axis…
B63H 21/165
The vessels being motor-driven: by hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised to rotate the propelling means