Veja estes exemplos, com explicações e definições:

Land Use Controls (LUCs) - News
An appurtenant easement is a right attached to the benefited property (dominant estate). Because an appurtenant easement is viewed as attached to the ...
www.lucs.org/news.cfm?id=219

Don Chase Mortgages - Easements
The first type of easement is an "appurtenant easement". An appurtenant easement benefits land. It can only be used by that land. ...
www.donchasemortgages.com/mort_title_easements.shtml

[PDF] 1 EASEMENTS I. INTRODUCTION A. An easement is a non-possessory ...
File Format: PDF/Adobe Acrobat - View as HTML
An appurtenant easement is an easement that is intended to benefit a .... in gross, an appurtenant easement runs with the land of both the benefitted ...
www.abanet.org/rppt/cmtes/standing-committees/community/Yi1...

APPURTENANT EASEMENT - GLOSSARY DEFINITION from BOSTONPADS ...
APPURTENANT EASEMENT. An easement that is annexed to the ownership of one parcel and allows the owner the use of the neighbor's land.
www.bostonpads.com/glossaryfiles/APPURTENANT_EASEMENT.html



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Note added at 3 hrs (2007-10-22 13:28:00 GMT)
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Expanding my answer to Simpson, here are some concepts (from http://www.howtolaw.co.nz/html/ml106.asp):

An easement is a right that a property owner has to some use of the (usually adjoining) property of another – for example, a right of way such as a driveway. If your rights under an easement are being interfered with you can take action to remove the interference yourself ("abatement") or you can bring proceedings in the courts.

This area has its own special terminology:

The person who enjoys the easement over the other person’s property is called the "dominant owner", and that person’s land is called the "dominant tenement".
The land subject to the easement is called the "servient tenement", and the owner of that land is referred to as the "servient owner".

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Note added at 3 hrs (2007-10-22 13:35:30 GMT)
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According to Barron's Law Dictionary, easement usually refers to a right enjoyed whereas servitudes refer to a burden imposed (as that of compulsory service of one to another).