Title: Laminated body

Abstract: A porous seal element usable as a blade tip seal in a turbomachine or as an element of a labyrinth seal is made up of a large number of strips disposed edgewise to the sealing face of the element and extending in the direction of relative movement of the seal elements. The strips have grooves extending across the strip for discharge of a cooling fluid such as air. The presence of the grooves provides a low density structure at the seal face of the seal element which may be abraded if there is rubbing contact and provides for metering of coolant at the rear face of the seal element. The seal element is fabricated by etching sheets so each sheet defines a number of parallel strips joined by weak ties and with the grooves extending across the strips; stacking the sheets and bonding them together; and then separating the bonded structure at the weak ties so that each stack of strips defines a seal element.

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Inventors: Carroll, Charles D. (Greensburg, IN, US)
Meginnis, George B. (Indianapolis, IN, US)

Application Number: 466741
Filing Date: 1974-05-03
Publication_date: 1976-01-20
Assignee: General Motors Corporation (Detroit, MI)
Primary Class(es): 428/593 428/594, 428/596, 428/601
Other Classes:
US Patent Ref:

3584972	Jun, 1971	Bratkovich et al.	29/191.
3719365	Mar, 1973	Emmerson et al.	277/53.

Other Refs:
Primary Examiner: Rutledge, L. Dewayne
Assistant Examiner: Crutchfield, O. F.
Attorney: Fitzpatrick; Paul