Exhibit 10.4  EXECUTION COPY  TRADEMARK SECURITY AGREEMENT  This Trademark Security
Agreement (as amended, amended and restated, supplemented or otherwise modified
from time to time, the Trademark Security
Agreement) dated May 31, 2007 is made by the Persons listed on the
signature pages hereof (collectively, the Grantors)
in favor of MERRILL LYNCH CAPITAL, a division of MERRILL LYNCH BUSINESS
FINANCIAL SERVICES INC., as collateral agent (the Collateral Agent) for the Secured Parties (as defined in the
Credit Agreement referred to below).  WHEREAS, UHS MERGER SUB,
INC., a Delaware corporation, UNIVERSAL HOSPITAL SERVICES, INC., a Delaware
corporation, UHS HOLDCO, INC., a Delaware corporation, have entered into a
Credit Agreement dated as of May 31, 2007 (as amended, amended and restated, supplemented
or otherwise modified from time to time, the Credit
Agreement) with the Lenders party thereto and MERRILL LYNCH
CAPITAL, a division of MERRILL LYNCH BUSINESS FINANCIAL SERVICES INC., as
administrative agent.  WHEREAS, as a condition
precedent to (i) the making of the Loans, (ii) the issuance of Letters of
Credit by the Lenders under the Credit Agreement, and (iii) the entry into
Secured Hedge Agreements by the Hedge Banks from time to time, each Grantor has
executed and delivered that certain Security Agreement dated as of May 31, 2007
made by the Grantors to the Collateral Agent (as amended, amended and restated,
supplemented or otherwise modified from time to time, the Security Agreement). Terms defined in the
Security Agreement and not otherwise defined herein are used herein as defined
in the Security Agreement.  WHEREAS, under the terms of
the Security Agreement, the Grantors have granted to the Collateral Agent, for
the ratable benefit of the Secured Parties, a security interest in, among other
property, certain Trademarks constituting Material Intellectual Property
Collateral of the Grantors, and have agreed as a condition thereof to execute
this Trademark Security Agreement for recording with the U.S. Patent and
Trademark Office and any other appropriate governmental authorities.  NOW, THEREFORE, for good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, each Grantor agrees as follows:  Section 1. Grant of Security.
Each Grantor hereby grants to the Collateral Agent for the ratable benefit of
the Secured Parties a continuing security interest in all of such Grantors
right, title and interest in and to the following (all of the following items
or types of property being herein collectively referred to as the Trademark Collateral), whether now owned
or existing or hereafter acquired or arising:  (i)each Trademark constituting Material
Intellectual Property Collateral owned by the Grantor (including, without limitation,
each Trademark registration and application therefor, referred to in Schedule 1
hereto, and all of the goodwill of the business connected with the use of or
symbolized by, each Trademark);  (ii)all registrations and applications for registration for any of the
foregoing, together with all renewals thereof;


(iii)all rights in the foregoing provided by international treaties or
conventions, all rights corresponding thereto throughout the world and all
other rights of any kind whatsoever of such Grantor accruing thereunder or
pertaining thereto; and  (iv)any and all proceeds of, collateral for, income, royalties and other
payments now or hereafter due and payable with respect to any and all of the
foregoing, including, without limitation, all Proceeds of and revenues from any
and all claims for damages and injunctive relief for past, present and future
infringement, dilution, misappropriation, violation, misuse or breach with
respect to any of the foregoing, with the right, but not the obligation, to sue
for and collect, or otherwise recover, all proceeds and damages relating
thereto.  Notwithstanding
the foregoing, no security interest shall be granted in any United States intent-to-use
applications to the extent that, and solely during the period in which, the
grant of a security interest therein would impair the validity or
enforceability of such intent-to-use trademark applications under federal law.  Section 2. Recordation.
Each Grantor authorizes and requests that the Commissioner for Trademarks and
any other applicable government officer record this Trademark Security
Agreement.  Section 3. Execution in
Counterparts. This Trademark Security Agreement may be executed in any
number of counterparts, each of which when so executed shall be deemed to be an
original and all of which taken together shall constitute one and the same
agreement.  Section 4. Grants, Rights
and Remedies. This Trademark Security Agreement has been executed and
delivered by the Grantors for the purpose of recording the grant of security
interest herein with the U.S. Patent and Trademark Office. The security
interest granted hereby has been granted to the Collateral Agent in connection
with the Security Agreement and is expressly subject to the terms and conditions
thereof and does not modify its terms or conditions or create any additional
rights or obligations for any party thereto or hereto. The Security Agreement
(and all rights and remedies of the Collateral Agent thereunder) shall remain
in full force and effect in accordance with its terms. In the event of a
conflict between any provision of this Trademark Security Agreement and any
provision of the Security Agreement, the Security Agreement shall govern.  Section 5. Governing Law.
This Trademark Security Agreement shall be governed by, and construed in
accordance with, the laws of the State of New York.  2


IN WITNESS WHEREOF, each Grantor has caused this Trademark Security
Agreement to be duly executed and delivered by its officer thereunto duly
authorized as of the date first above written.  UHS MERGER SUB, INC.By:
  /s/ Robert JunejaName: Robert JunejaTitle: President


UNIVERSAL HOSPITAL SERVICES, INC.,
  after
  giving effect to the AcquisitionBy:
  /s/ Rex T. ClevengerName: Rex T. ClevengerTitle: CFO & Executive Vice President


UHS HOLDCO, INC.By:
  /s/ Rex T. ClevengerName: Rex T. ClevengerTitle: CFO & Executive Vice President