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6726220 |
Dual seal assembly
A dual seal assembly for providing a seal between a reciprocating rod and the gland is described. The dual seal includes first and second axially adjacent annular seal elements. The first seal...
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6715767 |
Angled gap compression rings with end relief
An engine piston compression ring designed to reduce the negative effects of ring end butting and reduce blowby. The compression ring has a gap forming an angle with a longitudinal axis of the ring...
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6517081 |
Machinery seal
A seal assembly for a groove or seal gland in a relatively displaceable machine part for sealing an axial machine part extending therethrough comprises a pair of annular seal elements and a support...
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5603512 |
Side and gap sealed oil ring
An oil control ring assembly having a sealing ring and a scraping is disposed within a groove in a piston. The scraping ring assembly has a scraping end portion and spaced apart ends defining a...
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5087057 |
Helical cut seal
A ring seal has a radial cut, so that the ring seal may be transversely installed over a coaxial element. The cut extends radially and circumferentially to provide cut surfaces that overlap in...
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4844487 |
Lock-step duo step split sealing ring
A split sealing ring has a latch structure of overlapping, interengaging surfaces inclined to the ring's axis, which inclined surfaces seat against each other and intersect only the outer...
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4758005 |
Piston rings with a gap seal
A process for manufacturing a piston ring includes the step of forming a gap seal from an elongated member on one side and an "L-shape" on the other side; compressing the ring to close the gap seal...
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4576381 |
Spiral piston ring with tapered ends and recesses
A spiral piston ring made of self-lubricating material and having at least two complete convolutions and having a gradual and continuous taper except for the terminal portions thereof which taper...
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4256318 |
Piston ring
A parted annular piston ring having an outer periphery for engaging a cylinder wall of an internal combustion engine. A band of hard, wear-resistant material is secured in a groove which extends...
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3949997 |
Piston ring structure
A unitary spiral ring structure is fabricated from side-by-side split ring members with one end of one ring joined in overlapping relation to one end of the other ring by means of a silver soldered...
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3655208 |
SPLIT PISTON RING AND METHOD OF MANUFACTURE
A plastic or plastic-like piston ring of the expandable type for use in hydraulic and pneumatic actuators is constructed from a single annular member and the expansion and contraction capabilities...
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3455565 |
PISTON RINGS
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2812196 |
Piston ring turbine shaft seal
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