US4021049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable lip type seal for a crankshaft
Assignee: Caterpillar Inc
•
Filing: 1975-12-15
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Granted: 1977-05-03
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Expires: 1995-12-15
Abstract
Abstract A lip seal assembly provides an axially adjustable seal between a rotating shaft, such as a crankshaft, and a stationary housing, such as an engine block. The assembly includes a generally ring shaped retainer circumscribing the shaft and having a hollow, cylindrical cavity therein which receives a slidably positioned lip seal mounting member. A plurality of ring shaped spacer gaskets enable the lip seal to be axially adjusted within the cavity such that the point of engagement of the lip seal with a running surface of the shaft may be changed.
Inventors
- 👤 Elmer B. Phelps
- 👤 Allen J. Friede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A lip seal providing an axially adjustable seal on a running surface of a shaft comprising a generally ring shaped retainer circumscribing said shaft, a hollow cylindrical cavity within said retainer, a generally ring shaped seal mounting member slidably positioned within said cavity, a lip seal mounted on said seal mounting member in contacting relation with said shaft, a plurality of separate and distinct ring shaped spacer members in said cavity which are separable so that said seal mounting member may be selectively positioned between different ones of said plurality of spacer members, thereby allowing axial adjustment of the point of engagement of the lip seal with the running surface of the shaft, a ring shaped spacer retainer retaining said seal mounting member and said spacer members within said cavity, and mounting means mounting said spacer retainer on said retainer.
Claim 2
Dependent Claim
140 words
A lip seal providing an axially adjustable seal on a running surface of a shaft comprising a generally ring shaped retainer circumscribing said shaft, a hollow cylindrical cavity within said retainer, a generally ring shaped seal mounting member slidably positioned within said cavity, a lip seal mounted on said seal mounting member in contacting relation with said shaft, a plurality of separate and distinct ring shaped spacer members in said cavity which are separable so that said seal mounting member may be selectively positioned between different ones of said plurality of spacer members, thereby allowing axial adjustment of the point of engagement of the lip seal with the running surface of the shaft, a ring shaped spacer retainer retaining said seal mounting member and said spacer members within said cavity, and mounting means mounting said spacer retainer on said retainer.
Claim 3
Dependent Claim
40 words
The invention of claim 1 wherein said cavity is defined by a radially directed wall and an axially directed wall in said retainer and said spacer retainer, and wherein said spacers are dimensioned so as to substantially fill said cavity.
Claim 4
Dependent Claim
12 words
The invention of claim 2 wherein said spacers are of equal size.
Claim 5
Dependent Claim
12 words
The invention of claim 2 wherein said spacers are of resilient material.
Claim 6
Dependent Claim
11 words
The invention of claim 4 wherein said resilient material is rubber.
Claim 7
Dependent Claim
18 words
The invention of claim 1 wherein said lip seal is a generally ring shaped member of resilient material.
Claim 8
Dependent Claim
11 words
The invention of claim 6 wherein said resilient material is rubber.
Claim 9
Dependent Claim
26 words
The invention of claim 6 wherein said lip seal further includes a lip portion contacting said shaft and a retainer ring backing up said lip portion.
Claim 10
Dependent Claim
13 words
The invention of claim 8 wherein said retainer ring is of metal material.
Claim 11
Dependent Claim
17 words
The invention of claim 1 wherein said mounting means comprises bolt means passing through said spacer retainer.
References Cited (Backward Citations)
US2181203A
Cited
US2264413A
Cited
US2990220A
Cited
US3179423A
Cited
US3545771A
Cited
US3595585A
Cited
US3773336A
Cited
US3917286A
Cited
US3866813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |