US4832350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One piece labyrinth seal
Assignee: Individual
•
Filing: 1987-12-21
•
Granted: 1989-05-23
•
Expires: 2007-12-21
Abstract
Abstract A mechanical seal for rotating shafts consisting of a single ring member. The ring member has a series of radial grooves in the internal bore and a trough extending across the grooves to an end of the ring. The ring also has at least one external labyrinth groove extending radially and serving to inhibit contamination. A collection chamber having an expulsion port lies between the inner radial grooves and the external labyrinth groove.
Inventors
- 👤 David C. Orlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:31
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A seal between a fixed housing and a rotating shaft comprising: a. a single ring member stationary to the housing having a first end facing internally to the fixed housing and a second end facing externally of said housing, b. said ring member having at said first end a series of radial grooves in the internal bore of said ring member with said radial grooves disposed adjacent to the shaft with a trough extending across said radial grooves to the first end of said first member as a drain, c. said ring member having at said second end at least one external labyrinth groove extending radially within said internal bore, d. said ring member also having a contaminant collection chamber having an expulsion port in said external surface of said ring, and e. said contaminant collection chamber being located between said series of radial grooves at said first end and said external labyrinth groove at said second end.
Claim 2
Dependent Claim
158 words
A seal between a fixed housing and a rotating shaft comprising: a. a single ring member stationary to the housing having a first end facing internally to the fixed housing and a second end facing externally of said housing, b. said ring member having at said first end a series of radial grooves in the internal bore of said ring member with said radial grooves disposed adjacent to the shaft with a trough extending across said radial grooves to the first end of said first member as a drain, c. said ring member having at said second end at least one external labyrinth groove extending radially within said internal bore, d. said ring member also having a contaminant collection chamber having an expulsion port in said external surface of said ring, and e. said contaminant collection chamber being located between said series of radial grooves at said first end and said external labyrinth groove at said second end.
Claim 3
Dependent Claim
44 words
The seal of claim 1 having shoulder means on the circumference of said ring member in contact with said fixed housing whereby said shoulder means limits the depth to which said ring mamber may be inserted into the fixed housing by a circumferential incline.
Claim 4
Dependent Claim
21 words
The seal of claim 3 wherein said shoulder means is an incline of from 5 to 20 degrees from the horizontal.
Claim 5
Dependent Claim
36 words
The seal of claim 1 wherein said expulsion port is located at the lower surface of said collection chamber in said ring member providing a port for the expulsion of contaminants external to the bearing housing.
Claim 6
Dependent Claim
20 words
The seal of claim 1 wherein said expulsion port has a circumferentially extending width greater than its axially extending length.
Claim 7
Dependent Claim
20 words
The seal of claim 1 wherein said ring member is comprised of fiber, plastic, wood or some suitable non-metallic material.
Claim 8
Dependent Claim
16 words
The seal of claim 1 wherein said ring member is comprised of some suitable metallic material.
Claim 9
Dependent Claim
37 words
The seal of claim 1 wherein all inside corners on said radial grooves at said first end and said external labyrinth groove at said second end are sharp and unbroken and set at exactly ninety (90) degrees.
Claim 10
Dependent Claim
18 words
The seal of claim 1 wherein the axial width of the collection chamber is from 0.125" to 0.750".
Claim 11
Dependent Claim
26 words
The seal of claim 1 wherein the radial clearance between the inner surface of the external labyrinth groove and the shaft is between 0.002" and 0.010".
References Cited (Backward Citations)
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US4373759A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |