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Title: Ocean wave energy device

Abstract

This patent describes an ocean wave energy device of a type including a buoy which reciprocates in a substantially vertical direction in response to successive waves of variable frequency passing therebeneath, the buoy being supported upon a substantially vertically oriented shaft and a power take off means including a shaft driven by movement of the vertical shaft. The improvement described consists of: wave frequency detector means for detecting the instantaneous frequency of a wave passing the detector and which will thereafter pass the buoy by monitoring the contour of each wave as such wave passes such wave frequency detector means and measuring the time interval between the crest and the following trough and between the trough and following crest of each such wave and means for imposing an artificial resonance to the buoy whereby the buoy resonance may be substantially conformed to the frequency of the wave at the time at the buoy, the artificial resonance imposing means including brake means for halting vertical movement of the buoy at substantially the uppermost and substantially the lowermost limits of vertical travel of the buoy.

Inventors:
;
Publication Date:
OSTI Identifier:
5471911
Patent Number(s):
US 4599858
Assignee:
NOV; NOV-85-017779; EDB-86-149273
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 25 Oct 1977
Country of Publication:
United States
Language:
English
Subject:
16 TIDAL AND WAVE POWER; WATER WAVES; FREQUENCY MEASUREMENT; WAVE ENERGY CONVERTERS; CONTROL EQUIPMENT; DESIGN; BRAKES; BUOYS; GRAVITATION; MONITORING; RESONANCE; SEAS; SHAFTS; TIME MEASUREMENT; WAVE PROPAGATION; EQUIPMENT; GRAVITY WAVES; MACHINE PARTS; SURFACE WATERS; 160800* - Tidal & Wave Power- Wave Energy Converters

Citation Formats

LaStella, J P, and Tornabene, M G. Ocean wave energy device. United States: N. p., 1986. Web.
LaStella, J P, & Tornabene, M G. Ocean wave energy device. United States.
LaStella, J P, and Tornabene, M G. 1986. "Ocean wave energy device". United States.
@article{osti_5471911,
title = {Ocean wave energy device},
author = {LaStella, J P and Tornabene, M G},
abstractNote = {This patent describes an ocean wave energy device of a type including a buoy which reciprocates in a substantially vertical direction in response to successive waves of variable frequency passing therebeneath, the buoy being supported upon a substantially vertically oriented shaft and a power take off means including a shaft driven by movement of the vertical shaft. The improvement described consists of: wave frequency detector means for detecting the instantaneous frequency of a wave passing the detector and which will thereafter pass the buoy by monitoring the contour of each wave as such wave passes such wave frequency detector means and measuring the time interval between the crest and the following trough and between the trough and following crest of each such wave and means for imposing an artificial resonance to the buoy whereby the buoy resonance may be substantially conformed to the frequency of the wave at the time at the buoy, the artificial resonance imposing means including brake means for halting vertical movement of the buoy at substantially the uppermost and substantially the lowermost limits of vertical travel of the buoy.},
doi = {},
url = {https://www.osti.gov/biblio/5471911}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 15 00:00:00 EDT 1986},
month = {Tue Jul 15 00:00:00 EDT 1986}
}