PATENT SECURITY AGREEMENT

Exhibit 4.1.5

PATENT SECURITY AGREEMENT

This PATENT SECURITY AGREEMENT (this “Patent Security Agreement”) is made this 13 day of February, 2013, among the Pledgor listed on the signature pages hereof (the “Pledgor”), and Jefferies Finance LLC, in its capacity as Collateral Agent pursuant to the Second Lien Term Loan Agreement (in such capacity, together with its successors and assigns, the “Collateral Agent”).

W I T N E S S E T H:

WHEREAS, the Pledgor is party to a Second Lien Security Agreement, dated as of February 13, 2013, in favor of the Collateral Agent pursuant to which the Pledgor is required to execute and deliver this Patent Security Agreement.

NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Pledgor hereby agrees as follows:

1. DEFINED TERMS. All capitalized terms used but not otherwise defined herein have the meanings given to them in the Security Agreement.

2. GRANT OF SECURITY INTEREST IN PATENT COLLATERAL. The Pledgor hereby unconditionally grants, assigns, and pledges to the Collateral Agent, for the benefit of the Secured Parties, to secure the Secured Obligations, a continuing security interest (referred to in this Patent Security Agreement as the “Security Interest”) in all of the Pledgor’s right, title and interest in, to and under the following, whether presently existing or hereafter created or acquired (collectively, the “Patent Collateral”):

(a) all of the Pledgor’s Patents and Patent Intellectual Property Licenses to which it is a party including those referred to on Schedule I hereto;

(b) all reissues, continuations or extensions of the foregoing; and

(c) all products and proceeds of the foregoing, including any claim by the Pledgor against third parties for past, present or future infringement of any Patent or any Patent exclusively licensed under any Intellectual Property License, including the right to receive damages, or right to receive license fees, royalties, and other compensation under any Patent Intellectual Property License.

3. SECURITY FOR OBLIGATIONS. This Patent Security Agreement and the Security Interest created hereby secures the payment and performance of all the Secured Obligations, whether now existing or arising hereafter. Without limiting the generality of the foregoing, this Patent Security Agreement secures the payment of all amounts which constitute part of the Secured Obligations and would be owed by the Pledgor to the Collateral Agent, the Secured Parties or any of them, whether or not they are unenforceable or not allowable due to the existence of an Insolvency Proceeding involving the Pledgor.

4. SECURITY AGREEMENT. The Security Interest granted pursuant to this Patent Security Agreement is granted in conjunction with the security interests granted to Collateral Agent, for the benefit of the Secured Parties, pursuant to the Security Agreement. The Pledgor hereby acknowledges and affirms that the rights and remedies of Collateral Agent with respect to the Security Interest in the Patent Collateral made and granted hereby are more fully set forth in the Security Agreement, the terms and provisions of which are incorporated by reference herein as if fully set forth herein. To the extent there is any inconsistency between this Patent Security Agreement and the Security Agreement, the Security Agreement shall control.

5. AUTHORIZATION TO SUPPLEMENT. If the Pledgor shall obtain rights to any new patent application or issued patent or become entitled to the benefit of any patent application or patent for any divisional, continuation, continuation-in-part, reissue, or reexamination of any existing patent or patent application, the provisions of this Patent Security Agreement shall automatically apply thereto. The Pledgor shall give prompt notice in writing to the Collateral Agent with respect to any such new patent rights. Without limiting the Pledgor’s obligations under this Section, the Pledgor hereby authorizes the Collateral Agent unilaterally to modify this Patent Security Agreement by amending Schedule I to include any such new patent rights of the Pledgor. Notwithstanding the foregoing, no failure to so modify this Patent Security Agreement or amend Schedule I shall in any way affect, invalidate or detract from Collateral Agent’s continuing security interest in all Collateral, whether or not listed on Schedule I.

6. COUNTERPARTS. This Patent Security Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such separate counterparts shall together constitute but one and the same instrument. In proving this Patent Security Agreement in any judicial proceedings, it shall not be necessary to produce or account for more than one such counterpart signed by the party against whom such enforcement is sought. Any signatures delivered by a party by facsimile transmission or by e-mail transmission shall be deemed an original signature hereto.

7. CONSTRUCTION. Unless the context of this Patent Security Agreement clearly requires otherwise, references to the plural include the singular, references to the singular include the plural, the terms “includes” and “including” are not limiting, and the term “or” has, except where otherwise indicated, the inclusive meaning represented by the phrase “and/or.” The words “hereof,” “herein,” “hereby,” “hereunder,” and similar terms in this Patent Security Agreement refer to this Patent Security Agreement as a whole and not to any particular provision of this Patent Security Agreement. Section, subsection, clause, schedule, and exhibit references herein are to this Patent Security Agreement unless otherwise specified. Any reference in this Patent Security Agreement to any agreement, instrument, or document shall include all alterations, amendments, changes, extensions, modifications, renewals, replacements, substitutions, joinders, and supplements, thereto and thereof, as applicable (subject to any restrictions on such alterations, amendments, changes, extensions, modifications, renewals, replacements, substitutions, joinders, and supplements set forth herein). Any reference herein to the satisfaction or repayment in full of the Secured Obligations shall mean the repayment in full in cash of all Secured Obligations other than unasserted contingent indemnification Obligations that, at such time, are not required by the provisions of the Second Lien Term Loan Agreement to be repaid. Any reference herein to any Person shall be construed to include such Person’s successors and assigns. Any requirement of a writing contained herein shall be satisfied by the transmission of a Record and any Record so transmitted shall constitute a representation and warranty as to the accuracy and completeness of the information contained therein.

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8. CONTROLLING LAW. This Parent Security Agreement is to be governed and construed in accordance with the laws of the State of New York, without regard to the conflict of laws principles thereof.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, Pledgor has caused this Patent Security Agreement to be executed and delivered by its duly authorized officer as of the date first set forth above.

SCHEDULE I

TO

PATENT SECURITY AGREEMENT

U.S. Patent Schedule

STANADYNE CORPORATION

ISSUED PATENTS

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STANADYNE CORPORATION

PENDING PATENTS

Foreign Patent Schedule

STANADYNE CORPORATION

ISSUED PATENTS

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7

8

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STANADYNE CORPORATION

PENDING PATENTS

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STANADYNE CORPORATION

PATENT LICENSES

Stanadyne Corporation is a licensee under a certain Patent License Agreement dated as of November 8, 2012, by and between Hitachi Automotive Systems, LTA (“Hitachi”) and Stanadyne Corporation. Pursuant to this agreement, Stanadyne obtained a non-exclusive, non-transferrable, and non-sublicensable license to certain patents owned by Hitachi that were used by Stanadyne in the initial development of a component used in a high pressure gasoline fuel pump for sale to General Motors. The term of agreement lasts for five years from the effective date.

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