| Class Number |
Class Name |
No. of Patents |
| 277/914 |
Backup seal for failure of primary seal |
55 |
| 277/922 |
Bonding or joining for manufacture of seal |
117 |
| 277/923 |
Shrink-fitting for the assembly of seal |
12 |
| 277/921 |
Closure or weather strip seal |
204 |
| 277/924 |
Deformation, material removal, or molding for manufacture of seal |
171 |
| 277/910 |
O-ring seal |
422 |
| 277/907 |
Passageway in rod or shaft |
56 |
| 277/300 |
Process of dynamic sealing |
32 |
| 277/301 |
Close proximity seal (e.g., contactless, fluent, etc.) |
21 |
| 277/305 |
Floating ring or bushing |
9 |
| 277/304 |
Formed by pressurized sealing fluid introduced to form barrier |
24 |
| 277/303 |
Labyrinth |
52 |
| 277/302 |
Magnetic |
22 |
| 277/308 |
Contained or compressed by gland member in packing box |
23 |
| 277/311 |
Flexible ring |
26 |
| 277/309 |
Peripheral radially sealing flexible projection (e.g., lip, piston cup seal, etc.) |
54 |
| 277/310 |
Piston ring for internal combustion engine |
4 |
| 277/306 |
Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) |
47 |
| 277/307 |
Formed by flexible projection |
15 |
| 277/312 |
Process of static sealing |
90 |
| 277/313 |
Between parts of internal combustion engine |
38 |
| 277/316 |
Forming in place (i.e., in situ) |
104 |
| 277/314 |
Pipe, conduit, or cable |
150 |
| 277/315 |
Using flexible sleeve, boot, or diaphragm |
26 |
| 277/590 |
Seal between fixed parts or static contact against relatively movable parts |
94 |
| 277/591 |
Contact seal between parts of internal combustion engine |
251 |
| 277/600 |
Covering member or eyelet for opening |
53 |
| 277/601 |
Covering fire ring or sealing formation |
80 |
| 277/593 |
Having compression limiting feature |
192 |
| 277/599 |
Having flow restrictor |
18 |
| 277/598 |
Having installation, removal, assembly, disassembly, or repair feature |
185 |
| 277/597 |
Heat dissipating, cooling, or insulating feature |
34 |
| 277/592 |
Particular coating or layer of sealing material |
212 |
| 277/594 |
Particular dimensions or configuration of sealing bead or formation |
144 |
| 277/596 |
Elastomeric |
107 |
| 277/595 |
Metallic |
247 |
| 277/602 |
Contact seal for a pipe, conduit, or cable |
113 |
| 277/604 |
Allows rolling or folding |
50 |
| 277/606 |
And wall |
280 |
| 277/616 |
Having associated mounting or retaining feature |
334 |
| 277/619 |
Axially related backing ring |
68 |
| 277/624 |
And seal secure together |
22 |
| 277/620 |
Clamping gland |
37 |
| 277/621 |
Particular axially acting feature |
37 |
| 277/622 |
Threaded gland |
47 |
| 277/623 |
Particular gland shape |
17 |
| 277/618 |
Axially related or embedded coil spring |
19 |
| 277/617 |
Molded or cast into the pipe, conduit, or cable |
60 |
| 277/625 |
Particular and located on the pipe, conduit, or cable |
110 |
| 277/615 |
Having axially spaced projections |
144 |
| 277/605 |
Hollow, fluid-filled, or inflatable |
104 |
| 277/608 |
Inserted between end-to-end pipe, conduit, or cable joint |
202 |
| 277/614 |
Each end has recess for the seal |
108 |
| 277/611 |
Extrusion preventing (i.e., antiextrusion) or compression limiting feature |
42 |
| 277/609 |
Having installation, removal, assembly, disassembly, or repair feature |
159 |
| 277/612 |
Having plural projections |
74 |
| 277/613 |
Hose coupling |
12 |
| 277/610 |
Spirally wound structure |
37 |
| 277/627 |
Particular seal material or construction |
344 |
| 277/626 |
Particular seal shape |
476 |
| 277/603 |
Plural interfitting seal members for installation on the individual joined pipes, conduits, or cables |
78 |
| 277/607 |
Sleeve type |
143 |
| 277/628 |
Contact seal for other than internal combustion engine, or pipe, conduit, or cable |
181 |
| 277/634 |
Flexible sleeve, boot, or diaphragm |
211 |
| 277/635 |
Dome-, cup-, or bell-shaped, or for ball joint |
112 |
| 277/636 |
Tubular or frustoconical shape having corrugated wall portion |
271 |
| 277/630 |
Having installation, removal, assembly, disassembly, or repair feature |
260 |
| 277/637 |
Having particular associated mounting or retaining feature |
446 |
| 277/640 |
Anchoring feature extending through seal |
88 |
| 277/639 |
Compression limiting feature |
44 |
| 277/638 |
Extrusion preventing (i.e., antiextrusion) structure |
43 |
| 277/641 |
Groove structure on the seal or part |
258 |
| 277/642 |
Channel-shaped |
122 |
| 277/643 |
Single seat formed by plural recesses |
79 |
| 277/629 |
Magnetic |
27 |
| 277/644 |
Particular cross-sectional seal profile |
432 |
| 277/647 |
C-, u-, or v-shaped |
178 |
| 277/645 |
Hollow or filled chamber |
160 |
| 277/646 |
Inflatable |
118 |
| 277/648 |
Plural projections along sealing surface |
121 |
| 277/649 |
Plural projections along opposite sealing surfaces |
85 |
| 277/650 |
Particular sealing material or construction |
427 |
| 277/652 |
Distinct sheath or covering |
152 |
| 277/653 |
Metal |
57 |
| 277/651 |
Embedded reinforcement |
158 |
| 277/654 |
Plural layers |
172 |
| 277/632 |
Segmented periphery |
35 |
| 277/633 |
Spirally wound structure |
23 |
| 277/631 |
Split including end joining structure |
32 |
| 277/345 |
Seal between relatively movable parts (i.e., dynamic seal) |
237 |
| 277/355 |
Brush seal |
267 |
| 277/433 |
Centrifugal force affects change in displacement, shape, or contact |
43 |
| 277/500 |
Circumferential contact seal for other than piston |
283 |
| 277/503 |
Accommodates gyratory or oscillatory motion |
40 |
| 277/506 |
Arcuate bearing surface |
9 |
| 277/507 |
Partially spherical |
41 |
| 277/508 |
Axially spring biased |
4 |
| 277/509 |
Coaxial spring |
6 |
| 277/504 |
Flexible connection between seal and another part |
41 |
| 277/505 |
Oscillates perpendicularly to axis of motion |
28 |
| 277/501 |
And magnetic bias |
8 |
| 277/510 |
Contained or compressed by gland member in packing box |
59 |
| 277/542 |
Consisting of loose-fill type packing |
3 |
| 277/512 |
Fluid introducer or director |
49 |
| 277/517 |
Between packing boxes |
9 |
| 277/514 |
Drain, pressure relief, or vent |
24 |
| 277/513 |
External device or system |
24 |
| 277/515 |
Passage through axial facing surface |
5 |
| 277/516 |
Spacer between seals (e.g., lantern ring, etc.) |
58 |
| 277/511 |
Having installation, removal, assembly, disassembly, or repair feature |
78 |
| 277/529 |
Having particular cross-sectional seal profile |
58 |
| 277/530 |
C-, m-, u-, v-, x-, or z-shaped |
98 |
| 277/531 |
Wedging surface |
22 |
| 277/532 |
Made of elastomer or plastic |
24 |
| 277/533 |
Segmented |
2 |
| 277/528 |
Helically coiled packing |
11 |
| 277/520 |
Particular gland feature |
61 |
| 277/526 |
Externally threaded |
15 |
| 277/524 |
Eye or t-type bolt |
6 |
| 277/525 |
Internally threaded |
5 |
| 277/521 |
Segmented |
4 |
| 277/522 |
Spring bias |
29 |
| 277/523 |
Disposed about external bolt or stud |
29 |
| 277/534 |
Particular seal material or construction |
26 |
| 277/535 |
Composite |
17 |
| 277/538 |
Distinct sheath or covering |
22 |
| 277/536 |
Fibrous component |
24 |
| 277/537 |
Braided, woven, or twisted |
43 |
| 277/540 |
Elastomer or plastic |
70 |
| 277/539 |
Graphite |
60 |
| 277/541 |
Metal |
17 |
| 277/518 |
Plural distinct packing boxes |
28 |
| 277/519 |
Segmented packing boxes |
4 |
| 277/527 |
Wear sleeve |
13 |
| 277/585 |
Elongated sleeve or bushing |
64 |
| 277/584 |
Extrusion preventing (i.e., antiextrusion) structure |
138 |
| 277/502 |
For valve stem in internal combustion engine |
54 |
| 277/578 |
Having circumferentially adjustable biasing element |
18 |
| 277/579 |
Having floating ring or bushing (i.e., circumferentially contacting) |
32 |
| 277/583 |
Inflatable seal or seal biased by inflatable member |
44 |
| 277/582 |
Made of elastomer or plastic |
40 |
| 277/580 |
Radially translatable in groove |
28 |
| 277/581 |
And biased |
31 |
| 277/549 |
Peripheral radially sealing flexible projection (e.g., lip seal, etc.) |
269 |
| 277/553 |
Bias feature other than nominal garter spring |
100 |
| 277/557 |
Axially extending helical or spiral spring |
8 |
| 277/554 |
Embedded spring |
29 |
| 277/556 |
Material other than metal |
53 |
| 277/558 |
Particular fluid pressure responsive bias |
86 |
| 277/555 |
Radially extending finger spring |
27 |
| 277/560 |
Dimensional aspect of the flexible projection (e.g., angle, length, radius, thickness, etc.) |
197 |
| 277/551 |
Having installation, removal, assembly, disassembly, or repair feature |
222 |
| 277/552 |
Having pressure relief or venting feature |
104 |
| 277/559 |
Hydrodynamic sealing feature |
175 |
| 277/561 |
Intermediate flexible bending portion |
48 |
| 277/569 |
Lining or insert |
73 |
| 277/570 |
Made entirely of fluorocarbon material |
93 |
| 277/550 |
Made of metal or is a scraper |
75 |
| 277/572 |
Particular mounting, frame, casing, or reinforcement feature |
247 |
| 277/573 |
Peripheral mounting static seal |
67 |
| 277/574 |
Protrusion or bead cross-sectional profile |
75 |
| 277/576 |
Secured by clamping |
34 |
| 277/577 |
By distinct members |
64 |
| 277/575 |
Secured by molding or bonding |
100 |
| 277/562 |
Plural peripheral radially sealing flexible projections |
239 |
| 277/564 |
Having insert between the flexible projections |
23 |
| 277/563 |
Having interposed fluid receiver or director |
108 |
| 277/565 |
On radial facing side of single seal |
270 |
| 277/566 |
Both radial sides of the single seal (e.g., x-shaped, y-shaped, etc.) |
63 |
| 277/568 |
Including an excluder or wiper |
63 |
| 277/567 |
Radially facing u or v cross-sectional profile |
19 |
| 277/571 |
Wear sleeve |
106 |
| 277/589 |
Radially backed by resilient or elastomeric member |
131 |
| 277/587 |
Seated in groove having oblique wall |
42 |
| 277/586 |
Seated in groove having stepped walls |
23 |
| 277/543 |
Segmented ring |
51 |
| 277/544 |
Having pressure balancing or radial bias reduction feature |
17 |
| 277/546 |
Particular segment end structure |
16 |
| 277/547 |
Interfitting projection and recess |
17 |
| 277/548 |
Plural complementary interfitting rings |
12 |
| 277/545 |
Radial biasing spring element other than nominal garter spring |
34 |
| 277/409 |
Close proximity seal (e.g., contactless, fluent, etc.) |
97 |
| 277/431 |
Formed by pressurized sealing fluid introduced to form barrier |
172 |
| 277/432 |
External device or system |
79 |
| 277/411 |
Gap or clearance |
182 |
| 277/422 |
Floating ring or bushing |
104 |
| 277/412 |
Labyrinth |
259 |
| 277/414 |
Formed by cellular pockets (e.g., honeycomb, etc.) |
51 |
| 277/417 |
Formed by multiple washers |
17 |
| 277/418 |
Formed by plural grooves or projections on opposing surfaces |
44 |
| 277/419 |
Interfitting or overlapping |
110 |
| 277/420 |
And axially oriented |
78 |
| 277/413 |
Having adjustable member |
60 |
| 277/421 |
Having installation, removal, assembly, disassembly, or repair feature |
77 |
| 277/415 |
Having wear resistant, abradable, or ablative member |
82 |
| 277/416 |
Segmented |
51 |
| 277/423 |
Impeller (e.g., slinger, etc.) |
107 |
| 277/425 |
And static sealing means affected by rotational movement |
22 |
| 277/426 |
Actuated by counterweight |
1 |
| 277/429 |
Fluid collector or receiver |
45 |
| 277/427 |
Forms centrifugal liquid barrier |
28 |
| 277/428 |
Having cup or chamber inside the impeller or another rotating member |
11 |
| 277/430 |
Helical groove or thread on axially extending surface |
86 |
| 277/424 |
Rib or groove on radial extending surface |
59 |
| 277/410 |
Magnetic |
182 |
| 277/346 |
Diverse and distinct dynamic seals |
55 |
| 277/353 |
And circumferential peripheral radially sealing flexible projection (e.g., lip seal, etc.) |
134 |
| 277/347 |
Close proximity seal (e.g., contactless, fluent, etc.) |
86 |
| 277/350 |
And circumferential contact seal |
64 |
| 277/351 |
Peripheral radially sealing flexible projection (e.g., lip seal, etc.) |
97 |
| 277/348 |
And relatively rotatable radially extending contacting sealing members (e.g., face, mechanical, etc.) |
94 |
| 277/349 |
And circumferential peripheral radially sealing flexible projection (e.g., lip seal, etc.) |
50 |
| 277/352 |
Relatively rotatable radially extending contacting sealing members (e.g., face, mechanical, etc.) |
53 |
| 277/356 |
For journal box (e.g., railway car journal, etc.) |
5 |
| 277/357 |
For rotary piston |
57 |
| 277/354 |
Helically threaded part |
26 |
| 277/434 |
Piston ring or piston ring expander or seat therefor |
127 |
| 277/447 |
Floating piston ring |
21 |
| 277/448 |
Material other than metal |
23 |
| 277/435 |
Having installation, removal assembly, disassembly, or repair feature |
44 |
| 277/467 |
Particular piston ring expander |
67 |
| 277/470 |
Adjustable loading feature |
8 |
| 277/472 |
Annular expander nested in annular groove of the piston ring |
22 |
| 277/474 |
And contacting surfaces therebetween are complementary |
10 |
| 277/475 |
Having more than one pair of such surfaces |
9 |
| 277/473 |
Between piston rings |
9 |
| 277/476 |
Inclined or beveled groove contacting expander having dissimilar contour |
8 |
| 277/486 |
Bias feature adjoining opposed ends of split or segmented piston ring |
6 |
| 277/469 |
Bias limiting feature |
6 |
| 277/482 |
Circumferentially spaced separately seated radially acting bias feature |
6 |
| 277/483 |
Disposed in socket or about pin |
4 |
| 277/488 |
For axially adjacent piston rings |
19 |
| 277/484 |
Radially extending tongue formed from expander |
6 |
| 277/487 |
Segmented |
5 |
| 277/468 |
Separate and other than metal |
47 |
| 277/477 |
Slotted or undulating circular band including inclined or axially facing seat for the piston ring |
9 |
| 277/478 |
Axially spaced axially facing seats |
9 |
| 277/480 |
Circular band having axially displaced undulations |
10 |
| 277/479 |
Circular band having radially displaced undulations |
19 |
| 277/481 |
U-shaped circular band radially directed either inwardly or outwardly throughout its circumference |
11 |
| 277/471 |
Thermal expansion feature |
6 |
| 277/485 |
Undulating periphery providing axially extending face against inner perimeter of the piston ring |
7 |
| 277/449 |
Particular piston seat |
39 |
| 277/455 |
Arcuate wall |
10 |
| 277/456 |
Coating, treatment, or wall insert |
19 |
| 277/457 |
Having passageway for fluid return, pressure relief, or venting |
26 |
| 277/450 |
Helical form |
2 |
| 277/452 |
Oblique wall |
30 |
| 277/453 |
More than one oblique wall |
32 |
| 277/454 |
Having parallel walls |
3 |
| 277/451 |
Stepped walls |
32 |
| 277/466 |
Piston ring displays twisting or torsion |
26 |
| 277/436 |
Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.) |
95 |
| 277/438 |
Having c, u, or v cross-sectional profile |
31 |
| 277/439 |
Axially facing cup |
41 |
| 277/437 |
Having particular mounting, retaining, or supporting feature |
78 |
| 277/458 |
Piston ring having single piece noncircular or multiturn (e.g., helical, spiral, oblong, elliptical, polygonal, etc.) shape |
8 |
| 277/459 |
Piston ring including exposed port, slot, pocket, groove, channel, recess, or bevel |
22 |
| 277/460 |
Circumferential groove, channel, recess, or bevel |
41 |
| 277/461 |
Axially spaced |
10 |
| 277/462 |
Ports |
7 |
| 277/463 |
Ports |
15 |
| 277/464 |
Circumferentially spaced ports |
11 |
| 277/465 |
Circumferentially spaced slots, pockets, grooves, channels, recesses, or bevels |
22 |
| 277/440 |
Piston ring surface of dissimilar material or hardness |
30 |
| 277/441 |
Insert |
18 |
| 277/442 |
Surface coating, plating, or impregnation |
51 |
| 277/444 |
Chromium |
43 |
| 277/443 |
Nitrided |
45 |
| 277/445 |
Rotation limiting feature (i.e., antirotation) |
13 |
| 277/446 |
Between rings |
19 |
| 277/489 |
Sectional piston ring structure |
14 |
| 277/491 |
C, l, t, u, v, or z cross-sectional profile |
10 |
| 277/492 |
Three or more sections |
3 |
| 277/490 |
Eccentric or variable thickness component ring |
11 |
| 277/493 |
Segmented piston ring |
15 |
| 277/494 |
Separate bridging piece for gap in piston ring |
5 |
| 277/495 |
Secured to end |
1 |
| 277/496 |
Split single piece piston ring having opposed asymmetrical mirrored ends |
18 |
| 277/497 |
Arcuate or beveled mating surfaces |
13 |
| 277/498 |
Split single piece piston ring having other than opposed asymmetrical mirrored ends |
10 |
| 277/499 |
Arcuate or beveled mating surfaces |
14 |
| 277/358 |
Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) |
103 |
| 277/398 |
Eccentric, gyratory, or oscillatory motion |
84 |
| 277/370 |
Installation, removal, assembly, disassembly, or repair feature |
160 |
| 277/371 |
Unitized seal assembly (e.g., cartridge, etc.) |
69 |
| 277/372 |
Having rotation prevention (i.e., antirotation) feature for the sealing face member |
50 |
| 277/373 |
Lug or rib |
28 |
| 277/375 |
Mounted in housing or casing |
57 |
| 277/376 |
Snap fit into groove |
10 |
| 277/374 |
Retains opposed sealing face members |
57 |
| 277/408 |
Introduction, circulation, or removal of fluid |
268 |
| 277/404 |
Made of particular material |
72 |
| 277/405 |
Ceramic |
44 |
| 277/407 |
Elastomeric or plastic |
131 |
| 277/406 |
Metal |
48 |
| 277/361 |
Multiple sealing faces (e.g., double seals, etc.) |
110 |
| 277/364 |
Concentric and radially spaced |
59 |
| 277/362 |
Floating intermediate sealing face member |
50 |
| 277/363 |
Including an outwardly axial biasing member |
10 |
| 277/368 |
Housing mounted sealing face members biased axially away from each other |
33 |
| 277/369 |
Housing mounted sealing face members biased axially towards each other |
67 |
| 277/366 |
Shaft mounted sealing face members biased axially away from each other |
51 |
| 277/367 |
Shaft mounted sealing face members biased axially towards each other |
45 |
| 277/365 |
Three or more |
48 |
| 277/377 |
Particular axial biasing feature |
92 |
| 277/387 |
Fluid pressure |
127 |
| 277/389 |
And bellows or diaphragm |
36 |
| 277/388 |
Creates counter pressure |
42 |
| 277/378 |
Magnetic |
16 |
| 277/379 |
Particular spring feature |
89 |
| 277/385 |
Arrangement or location |
39 |
| 277/386 |
Radially biasing member creates axial bias |
14 |
| 277/383 |
Imbedded in another material |
18 |
| 277/380 |
Made of elastomeric material |
71 |
| 277/381 |
Frustoconical shape |
25 |
| 277/382 |
O-ring shape |
61 |
| 277/384 |
Washerlike shape |
66 |
| 277/399 |
Particular sealing face member configuration |
320 |
| 277/403 |
Angled or tapered sealing face |
70 |
| 277/402 |
Flexible projection (e.g., lip seal, etc.) |
371 |
| 277/401 |
Fluid passage to the sealing face |
85 |
| 277/400 |
Hydrodynamic feature |
166 |
| 277/390 |
Particular secondary mounting seal or driving connection |
161 |
| 277/396 |
Axially compressed packing |
27 |
| 277/391 |
Flexible sleeve, boot, or diaphragm |
112 |
| 277/392 |
Between sealing face member and shaft or part relating to shaft |
61 |
| 277/393 |
Particular connecting feature to sealing face member |
34 |
| 277/397 |
Frictionally engaged or interfitting projection and recess |
90 |
| 277/394 |
Peripheral radially sealing flexible projection (e.g., lip seal, etc.) |
57 |
| 277/395 |
U- or v-shaped cross-sectional profile |
25 |
| 277/359 |
Temperature responsive feature |
24 |
| 277/360 |
Accommodates or prevents thermal distortion |
20 |
| 277/918 |
Seal combined with filter or fluid separator |
91 |
| 277/317 |
Seal combined with indicator, sampler, or inspection feature |
80 |
| 277/320 |
Fluid leakage |
94 |
| 277/318 |
Fluid pressure |
44 |
| 277/319 |
Fluid temperature |
17 |
| 277/321 |
Wear, proper seating, or presence |
57 |
| 277/911 |
Seal combined with nominal motion transmitting device |
21 |
| 277/912 |
Spline connection |
29 |
| 277/929 |
Seal feature where change in operation or condition induces additional leakage control |
47 |
| 277/906 |
Seal for article of indefinite length (e.g., strip, sheet, etc.) |
79 |
| 277/913 |
Seal for fluid pressure below atmospheric (e.g., vacuum, etc.) |
89 |
| 277/903 |
Seal for rotating kiln or drum |
60 |
| 277/902 |
Seal for sterling engine |
40 |
| 277/908 |
Seal for use in rotating and reciprocating arrangement |
26 |
| 277/322 |
Seal for well apparatus |
110 |
| 277/335 |
Axially facing packing cup |
20 |
| 277/336 |
For below ground apparatus |
166 |
| 277/337 |
Longitudinally actuated packer |
30 |
| 277/338 |
Packing sleeve |
19 |
| 277/339 |
Expanded by wedging member |
23 |
| 277/340 |
Particular wall structure |
23 |
| 277/341 |
Reinforcing feature |
12 |
| 277/342 |
Plural stacked rings |
50 |
| 277/324 |
For overpressure control device (e.g., seal for a blowout preventer, etc.) |
27 |
| 277/327 |
Axially compressed ring |
30 |
| 277/326 |
Rotatable |
24 |
| 277/325 |
Segmented radially actuated (e.g., ram type, etc.) |
70 |
| 277/331 |
Inflatable packer |
30 |
| 277/333 |
And inflating medium control |
38 |
| 277/332 |
Deforms radially inward |
9 |
| 277/334 |
Particular wall structure |
47 |
| 277/323 |
Installation, removal, assembly, disassembly, or repair feature |
23 |
| 277/328 |
Longitudinally actuated packer for above ground apparatus |
46 |
| 277/329 |
Contained or compressed by gland member in packing box |
51 |
| 277/330 |
For line or cable |
18 |
| 277/343 |
Seal (e.g., wiper, oil saver, stripper, etc.) accommodates irregular size of inner part |
31 |
| 277/344 |
Segmented radially actuated packer (e.g., oil saver, gas saver, etc.) for above ground apparatus |
3 |
| 277/915 |
Seal including compression set feature |
10 |
| 277/919 |
Seal including electrical feature |
93 |
| 277/920 |
Seal including electromagnetic shielding feature |
105 |
| 277/927 |
Seal including fluid pressure differential feature |
85 |
| 277/926 |
Seal including fluid pressure equalizing or balancing feature |
68 |
| 277/917 |
Seal including frangible feature |
61 |
| 277/930 |
Seal including heating or cooling feature |
204 |
| 277/928 |
Seal including pressure relief or vent feature |
154 |
| 277/931 |
Seal including temperature responsive feature |
91 |
| 277/932 |
Bi-metallic |
8 |
| 277/933 |
Chemical reaction or physical change of state |
51 |
| 277/916 |
Seal including vibration dampening feature |
76 |
| 277/935 |
Seal made of a particular material |
33 |
| 277/943 |
Ceramic or glass |
50 |
| 277/936 |
Composite |
109 |
| 277/938 |
Carbon or graphite particle or filament |
82 |
| 277/937 |
Glass particles or filament |
52 |
| 277/939 |
Containing metal |
39 |
| 277/940 |
Alloy |
52 |
| 277/941 |
Aluminum or copper |
45 |
| 277/942 |
Silver or gold |
16 |
| 277/944 |
Elastomer or plastic |
203 |
| 277/945 |
Containing fluorine |
41 |
| 277/946 |
Ptfe "teflon" |
138 |
| 277/934 |
Seal swells when wet |
26 |
| 277/909 |
Similar sealing structures for mounting on piston and about rod |
22 |
| 277/925 |
Snap fit feature for mounting or assembly of seal |
50 |
| 277/905 |
T-shaped or i-shaped ring member including seal on a side |
19 |
| 277/904 |
Viscous seal |
40 |
