US4244588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear seal assembly
Assignee: Caterpillar Inc
•
Filing: 1979-11-05
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Granted: 1981-01-13
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Expires: 1999-11-05
Abstract
Abstract PCT NO. PCT/US79/00943 Sec. 371 Date Nov. 5, 1979 Sec. 102(e) Date Nov. 5, 1979, PCT Filed Nov. 5, 1979. A shear seal assembly (80) for sealing between two members (22,36) having limited relative motion therebetween has an inner sleeve (86), an outer sleeve (88), and an elastomeric member (90) connecting the sleeves (86,88). The inner sleeve (86) is in a press fit relationship with one of the members (22) and the outer sleeve (88) is in a press fit relationship with the other of the members (36). Thrust members (92,93) extending radially outwardly along the sides (94,96,98,99) of the seal assembly (80) control distortion thereof and prevent damage thereto. A protective member (93, 100) prevents the ingress of external contaminants and abrasives into the area to be sealed.
Inventors
- 👤 Stewart A. Langewisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/088; B62D55/0887; B62D55/14; B62D55/15; F; F16; F16J; F16J15/00; F16J15/50; F16J15/52
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
In a seal assembly (80/80') for sealing between first and second members (22,36/22',36') having limited relative motion therebetween, the seal assembly (80,80') including an inner sleeve (86/86'), an outer sleeve (88/88'), and an annular elastomeric member (90/90') connected between the sleeves (86,88/86',88'), the inner and outer sleeves (86,88/86',88') each including first and second side portions (94,98,96,99/94',98',96',99'), the second member (36/36') having first and second bores (76,82'/76',82') and a thrust surface (84/84') therebetween, the improvement comprising: thrust means (92,93,102/92') extending radially from the inner to the outer sleeves (86,88/86',88') and adjacent thereto, the outer sleeve (88/88') being connected to the second bore (82/82') and the inner sleeve (86/86') being connected to the first member (22/22').
Claim 2
Dependent Claim
114 words
In a seal assembly (80/80') for sealing between first and second members (22,36/22',36') having limited relative motion therebetween, the seal assembly (80,80') including an inner sleeve (86/86'), an outer sleeve (88/88'), and an annular elastomeric member (90/90') connected between the sleeves (86,88/86',88'), the inner and outer sleeves (86,88/86',88') each including first and second side portions (94,98,96,99/94',98',96',99'), the second member (36/36') having first and second bores (76,82'/76',82') and a thrust surface (84/84') therebetween, the improvement comprising: thrust means (92,93,102/92') extending radially from the inner to the outer sleeves (86,88/86',88') and adjacent thereto, the outer sleeve (88/88') being connected to the second bore (82/82') and the inner sleeve (86/86') being connected to the first member (22/22').
Claim 3
Dependent Claim
19 words
The seal assembly of claim 1 wherein the outer sleeve (88/88') is press fitted into the second bore (82/82').
Claim 4
Dependent Claim
19 words
The seal assembly of claim 1 wherein the inner sleeve (86/86') is press fitted onto the first member (22/22').
Claim 5
Dependent Claim
29 words
The seal assembly of claim 1 wherein the thrust means (92,93,100/92') comprises a thrust member (92/92') positioned intermediate the thrust surface (84/84') and the first sleeve side portions (94,96/94',96').
Claim 6
Dependent Claim
36 words
The seal assembly of claim 4 wherein the thrust means (92,93,100/92') includes a second thrust member (93) positioned adjacent the second sleeve side portions (98,99) and a snap ring (100) connected to the second member (36).
Claim 7
Dependent Claim
16 words
The seal assembly of claim 4 wherein the thrust member (92/92') is an annular ring (92,92').
Claim 8
Dependent Claim
17 words
The seal assembly of claim 5 wherein the second thrust member (93) is an annular ring (93).
Claim 9
Dependent Claim
22 words
The seal assembly of claim 1 including means (93,100/104) for preventing the ingress of abrasives and contaminants into the seal assembly (80/80').
Claim 10
Dependent Claim
16 words
The seal assembly of claim 8 wherein the preventive means (93,100/104) is an L-shaped plug (104).
Claim 11
Dependent Claim
18 words
The seal assembly of claim 9 wherein the plug (104) is press fitted into the second member (36').
Claim 12
Dependent Claim
40 words
The seal assembly of claim 8 wherein the preventive means (93,100/104) is a snap ring (100) connected to the second member (36) and an annular ring (93) positioned intermediate the snap ring (100) and the second sleeve side portions (98,99).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |