US3574351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating seal assembly
Assignee: Motors Liquidation Co
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Filing: 1969-10-30
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Granted: 1971-04-13
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Expires: 1989-10-30
Abstract
Abstract A seal assembly for the space between a bore and a relatively reciprocating shaft includes a cup-shaped sealing member mounted at one end on the shaft and having an axially extending outer conical sleeve which radially outwardly terminates at the other end in a peripheral sealing edge defined by the intersection of the conical sleeve with a right cylindrical surface having an axis perpendicular to the axis of the sealing member. The sealing edge is in the form of a two-cycle sine wave and is biased against the bore by axial surface bending to establish sealing contact in an infinite number of radial planes.
Inventors
- 👤 Donald D Stoltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:55
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A seal for the space between relatively reciprocating members comprising: a generally cup-shaped flexible member adapted to be carried at one end by one of the members and having a thin-walled conical sleeve portion extending axially beyond said one end, said sleeve portion terminating at the other end in a peripheral sealing edge defined by a compound surface generated by an axial cone intersected by a right cylinder having its axis perpendicular to the axis of said cone, said sealing edge having a major diameter in a plane perpendicular to said axis of said right cylinder and a minor diameter in a plane perpendicular to said first-mentioned plane whereby said sleeve portion is biased by axial surface bending into engagement with said other member in an infinite number of radial planes to establish sealing contact therewith and accommodate variations in the peripheral size of said flexible member and said other member by inward and outward deflecting action of said sleeve portion.
Claim 2
Dependent Claim
161 words
A seal for the space between relatively reciprocating members comprising: a generally cup-shaped flexible member adapted to be carried at one end by one of the members and having a thin-walled conical sleeve portion extending axially beyond said one end, said sleeve portion terminating at the other end in a peripheral sealing edge defined by a compound surface generated by an axial cone intersected by a right cylinder having its axis perpendicular to the axis of said cone, said sealing edge having a major diameter in a plane perpendicular to said axis of said right cylinder and a minor diameter in a plane perpendicular to said first-mentioned plane whereby said sleeve portion is biased by axial surface bending into engagement with said other member in an infinite number of radial planes to establish sealing contact therewith and accommodate variations in the peripheral size of said flexible member and said other member by inward and outward deflecting action of said sleeve portion.
Claim 3
Dependent Claim
195 words
A seal assembly for sealing the space between a bore of a housing and a relatively reciprocating shaft comprising: a cup-shaped seal formed of a flexible material having an annular base carried on the shaft and a thin-walled conical sleeve extending axially outwardly from said base, said conical sleeve having a low approach angle with respect to said bore and radially outwardly terminating with a constantly axially varying sealing edge in the form of a two-cycle sine wave, said sealing edge being defined by a right cylinder having its axis perpendicular to the axis of the seal and intersecting said conical sleeve such that the diameter of said sealing edge in a plane perpendicular to said axis of said right cylinder is greater than the diameter of said bore and the diameter of said sealing edge in a plane perpendicular to said first-mentioned plane is less than the diameter of said bore whereby said conical sleeve is biased by axial surface bending into engagement with said bore to establish sealing contact therewith with variations in the diameter of said sealing member and said bore being accommodated by inward and outward deflecting of the sealing edge.
Claim 4
Dependent Claim
195 words
A seal assembly for sealing the space between a bore of a housing and a relatively reciprocating shaft comprising: a cup-shaped seal formed of a flexible material having an annular base carried on the shaft and a thin-walled conical sleeve extending axially outwardly from said base, said conical sleeve having a low approach angle with respect to said bore and radially outwardly terminating with a constantly axially varying sealing edge in the form of a two-cycle sine wave, said sealing edge being defined by a right cylinder having its axis perpendicular to the axis of the seal and intersecting said conical sleeve such that the diameter of said sealing edge in a plane perpendicular to said axis of said right cylinder is greater than the diameter of said bore and the diameter of said sealing edge in a plane perpendicular to said first-mentioned plane is less than the diameter of said bore whereby said conical sleeve is biased by axial surface bending into engagement with said bore to establish sealing contact therewith with variations in the diameter of said sealing member and said bore being accommodated by inward and outward deflecting of the sealing edge.
References Cited (Backward Citations)
US1757016A
Cited
US1945524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |