SERVICE TEE MARKER FIXTURE
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Accused Products
Abstract
A service tee marker fixture comprises a disk marker and a cylindrical attachment sleeve fastened concentrically to the disk marker and constructed of a flexible material which provides a releasable friction fit with a service tee cap. For certain sleeve materials a stiffener plate is used to secure an end portion of sleeve adjacent to the disk marker. Detents are formed inside the attachment sleeve to grip matching ribs on the cap. An integrally formed inwardly-extending annular flange at an open end of the sleeve helps retain the sleeve on the cap. When installed the wire coil is horizontal and the marker shields the tee, and is further centered over a centerline of the main pipe. A novel method is also disclosed for using the service tee marker fixtures to survey and locate service line end points.
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Citations
22 Claims
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1-19. -19. (canceled)
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20. A method of locating an end point of a buried service line connected to a buried main line using a receiver which detects locating signals from buried markers, comprising:
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searching a known vicinity to find a first above-ground location corresponding to a first buried electronic marker positioned over a centerline of the main line at a service tee; determining a direction of an axis of the main line; searching along a path orthogonal to the main line direction from the first above-ground location to find a second above-ground location corresponding to a second buried electronic marker positioned at the end point of the buried service line. - View Dependent Claims (21, 22)
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Specification