Patent US3869131A successfully refreshed from Google Patents.
US3869131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple seal carrier
Assignee: PT Components Inc
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Filing: 1973-06-20
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Granted: 1975-03-04
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Expires: 1993-06-20
Abstract
Abstract A seal carrier, which receives a rotatable shaft therethrough, has two spaced apart seals mounted therein. A first annular grease chamber around the shaft is defined between the two seals, and a second annular grease chamber around the shaft is defined between one of the seals and a circular flange of the carrier which is spaced from said one seal. The carrier has a grease inlet fitting in communication with both grease chambers, and has a discharge opening diametrically opposite the inlet fitting. The circular flange is closely spaced to the shaft and defines a small, annular discharge opening therewith. Grease introduced under pressure through the inlet fitting is distributed all around the annular grease chambers, with excess grease being discharged from said discharge openings.
Inventors
- 👤 William J Derner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6603; F16C33/6607; F16C33/6618; F16C33/6622; F16C33/72; F16C33/76; F16C33/78; F16C33/7896; F16C35/00; F16C35/04; F16C35/042; F16C35/047; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/32; F16J15/3248; F16J15/3252; F16C19/00; F16C19/22; F16C19/34; F16C19/38; F16C23/00; F16C23/06; F16C23/08; F16C23/082; F16C23/086; F16C2300/00; F16C2300/02; Y; Y10; Y10S; Y10S277/00; Y10S277/904
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
172 words
A seal carrier for sealing an opening surrounding a shaft, said seal carrier having a housing to encircle said shaft, and fill said opening, said housing having a bore extending therethrough comprising a first, a second, and a third bore portion of progressively decreasing diameter, said bore portions connected to form a first shoulder between said first and second bore portions and to form a second shoulder between said second and third bore portions, a pair of seal units mounted in said first bore portion in spaced apart relation to form a first annular grease chamber therebetween, one of said seal units spaced from said second shoulder to form a second annular grease chamber therebetween, a grease inlet opening, means defining a first branch grease passage from said grease inlet opening to said first chamber, protuberances on one of said seals for engagement with said first shoulder to form a branch grease passage between said one seal and said first shoulder leading from said grease inlet opening to said second annular chamber.
Claim 2
Dependent Claim
172 words
A seal carrier for sealing an opening surrounding a shaft, said seal carrier having a housing to encircle said shaft, and fill said opening, said housing having a bore extending therethrough comprising a first, a second, and a third bore portion of progressively decreasing diameter, said bore portions connected to form a first shoulder between said first and second bore portions and to form a second shoulder between said second and third bore portions, a pair of seal units mounted in said first bore portion in spaced apart relation to form a first annular grease chamber therebetween, one of said seal units spaced from said second shoulder to form a second annular grease chamber therebetween, a grease inlet opening, means defining a first branch grease passage from said grease inlet opening to said first chamber, protuberances on one of said seals for engagement with said first shoulder to form a branch grease passage between said one seal and said first shoulder leading from said grease inlet opening to said second annular chamber.
Claim 3
Dependent Claim
29 words
The seal carrier of claim 1 wherein a gap is defined between said shaft and said third bore portion to define a discharge opening from said second annular chamber.
Claim 4
Dependent Claim
18 words
The seal carrier of claim 2 including a discharge opening in communication with said first annular grease chamber.
Claim 5
Dependent Claim
43 words
The seal carrier of claim 3 wherein the restriction to grease flow from said discharge openings is greater than the restriction to flow of said inlEt passages whereby grease introduced through said grease inlet opening will be distributed completely around said grease chambers.
Claim 6
Dependent Claim
32 words
The seal carrier of claim 1 wherein said one seal unit includes a seal case and wherein said protuberances on said one seal unit are angularly spaced dimples on the seal case.
Claim 7
Dependent Claim
36 words
The seal carrier of claim 1 wherein said one seal unit includes a seal case and wherein said protuberances on said one seal unit are angularly spaced spacer strips on the seal case of said unit.
Claim 8
Dependent Claim
136 words
A seal carrier for receipt in a housing to protect bearings mounted in the housing inwardly of said seal carrier, said seal carrier having an inner and outer seal therein spaced apart to define therebetween a first annular grease chamber in the carrier surrounding the shaft, an outer wall in said carrier defining a circular opening for said shaft, the outer seal spaced from said wall to define a second annular grease chamber in the carrier surrounding said shaft, and means to supply grease under pressure separately to said first annular grease chamber for penetration between the seals and the shaft on either side of said first chamber and to said second annular grease chamber for discharge through the gap between the outer wall and the shaft to flush dirt and abrasives from the seal carrier.
Claim 9
Dependent Claim
136 words
A seal carrier for receipt in a housing to protect bearings mounted in the housing inwardly of said seal carrier, said seal carrier having an inner and outer seal therein spaced apart to define therebetween a first annular grease chamber in the carrier surrounding the shaft, an outer wall in said carrier defining a circular opening for said shaft, the outer seal spaced from said wall to define a second annular grease chamber in the carrier surrounding said shaft, and means to supply grease under pressure separately to said first annular grease chamber for penetration between the seals and the shaft on either side of said first chamber and to said second annular grease chamber for discharge through the gap between the outer wall and the shaft to flush dirt and abrasives from the seal carrier.
Claim 10
Dependent Claim
15 words
The seal carrier of claim 7 including a discharge passage from said first grease chamber.
Claim 11
Dependent Claim
38 words
The seal carrier of claim 7 wherein said means to receive grease under pressure includes a grease fitting and a first passage leading to said first grease chamber and a second passage leading to said second grease chamber.
Claim 12
Dependent Claim
199 words
A seal carrier for receipt in a housing to protect bearings mounted in the housing inwardly of said seal carrier, said seal carrier having an inner and outer seal therein spaced apart to define therebetween a first annular grease chamber in the carrier surrounding the shaft, an outer wall in said carrier defining a circular opening for said shaft, the outer seal spaced from said wall to define a second annular grease chamber in the carrier surrounding said shaft, and means including a first passage to supply grease under pressure directly to said first annular grease chamber for penetration between the seals and the shaft on either side of said first chamber and including a second passage to supply grease under pressure directly to said second annular grease chamber for discharge through the gap between the outer wall and the shaft to flush dirt and abrasives from the seal carrier, means defining a discharge passage from said first grease chamber, said discharge passage from the first grease chamber and the discharge passage from the second grease chamber defined by the gap between the wall and the shaft defining greater restrictions to flow than said first and second passages, respectiively.
Claim 13
Dependent Claim
199 words
A seal carrier for receipt in a housing to protect bearings mounted in the housing inwardly of said seal carrier, said seal carrier having an inner and outer seal therein spaced apart to define therebetween a first annular grease chamber in the carrier surrounding the shaft, an outer wall in said carrier defining a circular opening for said shaft, the outer seal spaced from said wall to define a second annular grease chamber in the carrier surrounding said shaft, and means including a first passage to supply grease under pressure directly to said first annular grease chamber for penetration between the seals and the shaft on either side of said first chamber and including a second passage to supply grease under pressure directly to said second annular grease chamber for discharge through the gap between the outer wall and the shaft to flush dirt and abrasives from the seal carrier, means defining a discharge passage from said first grease chamber, said discharge passage from the first grease chamber and the discharge passage from the second grease chamber defined by the gap between the wall and the shaft defining greater restrictions to flow than said first and second passages, respectiively.
Claim 14
Dependent Claim
153 words
A seal carrier for sealing an opening surrounding a shaft, said seal carrier having a housing to encircle said shaft and fill said opening, said housing having a bore extending therethrough comprising at least a first and a second bore portion of progressively decreasing diameter, said bore portions connected to form a shoulder between said first and second bore portions, a pair of seal units mounted in said first bore portion in spaced apart relation to form a first annular grease chamber therebetween, one of said seal units spaced from said shoulder to form a second annular grease chamber, a grease inlet opening, means defining a first branch grease passage from said grease inlet opening to said first chamber, means to space one of said seals from said shoulder to form a branch grease passage between said one seal and said shoulder leading from said grease inlet opening to said second annular chamber.
Claim 15
Dependent Claim
153 words
A seal carrier for sealing an opening surrounding a shaft, said seal carrier having a housing to encircle said shaft and fill said opening, said housing having a bore extending therethrough comprising at least a first and a second bore portion of progressively decreasing diameter, said bore portions connected to form a shoulder between said first and second bore portions, a pair of seal units mounted in said first bore portion in spaced apart relation to form a first annular grease chamber therebetween, one of said seal units spaced from said shoulder to form a second annular grease chamber, a grease inlet opening, means defining a first branch grease passage from said grease inlet opening to said first chamber, means to space one of said seals from said shoulder to form a branch grease passage between said one seal and said shoulder leading from said grease inlet opening to said second annular chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |