-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EftD/a4mbf9xZDcZ+WcTEqmP60dCLqdgAL8Y/8lh/vrRSypLGmoeaqCN6FKuW5RI
 TWT9CcsFA0uK1gdE+mTMbg==

<SEC-DOCUMENT>0000352281-03-000003.txt : 20030804
<SEC-HEADER>0000352281-03-000003.hdr.sgml : 20030804
<ACCEPTANCE-DATETIME>20030804145816
ACCESSION NUMBER:		0000352281-03-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030731
FILED AS OF DATE:		20030804

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GAVIN JAMES R III
		CENTRAL INDEX KEY:			0001220966

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16283
		FILM NUMBER:		03820335

	MAIL ADDRESS:	
		STREET 1:		BAXTER INTERNATIONAL INC
		STREET 2:		ONE BAXTER PARKWAY
		CITY:			DEERFIELD
		STATE:			IL
		ZIP:			60015

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EQUIDYNE CORP
		CENTRAL INDEX KEY:			0000352281
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				042608713
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0731

	BUSINESS ADDRESS:	
		STREET 1:		11300 SORRENTO VALLEY ROAD #255
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		858-587-7777

	MAIL ADDRESS:	
		STREET 1:		11300 SORRENTO VALLEY RD #255
		STREET 2:		.
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN ELECTROMEDICS CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-07-31</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000352281</issuerCik>
        <issuerName>EQUIDYNE CORP</issuerName>
        <issuerTradingSymbol>IJX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001220966</rptOwnerCik>
            <rptOwnerName>GAVIN JAMES R III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BAXTER INTERNATIONAL INC</rptOwnerStreet1>
            <rptOwnerStreet2>ONE BAXTER PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>DEERFIELD</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60015</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>

        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.49</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2003-07-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>11000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.49</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2003-07-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2013-07-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.10 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>11000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>175000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>

    </derivativeTable>


    <remarks>On July 31, 2003, Dr. Gavin received 11,000 options under the Issuer's 2002 Long Term Incentive and Share Award Plan.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffery B. Weinress as Attorney-in-fact for Dr. James R. Gavin III</signatureName>
        <signatureDate>2003-08-04</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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