Patent US286588A successfully refreshed from Google Patents.
US4820409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pressure relief valve assembly
Assignee: Mann and Hummel Purolator Filters LLC
•
Filing: 1988-04-19
•
Granted: 1989-04-11
•
Expires: 2008-04-19
Abstract
Abstract A plastic relief valve assembly is provided having a one-piece valve body, with a sleeve portion and a slotted portion, and a valve. The slotted portion includes a plurality of radially disposed inlets. The valve includes an axial portion and a radial portion. The radial portion extends angularly over the radial inlets in a seated position and the axial portion extends into the valve body for quick connection therewith by a groove and rib combination provided on the valve and valve body, respectively. The radial portion of the plastic valve is flexible, and the valve opens when fluid pressure reaches a predetermined level. A plastic antidrain valve is also connected to the valve body. A fluid filter incorporating the combined plastic relief valve assembly/antidrain back valve is also provided.
Inventors
- 👤 John Lowsky
- 👤 Scott Trierwiler
- 👤 Nicholas Torchia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:36
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; B; B01; B01D; B01D27/00; B01D27/10; B01D27/103; B01D27/106; F16K15/148; Y; Y10; Y10S; Y10S210/00; Y10S210/17; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
86 words
A pressure relief valve assembly for a fluid filter, comprising: (a) a valve body having (i) a sleeve portion including a central outlet, and (ii) a slotted portion formed on the sleeve portion and including plural radial inlets, and (b) a valve having (i) an axial portion, and (ii) a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure.
Claim 2
Dependent Claim
86 words
A pressure relief valve assembly for a fluid filter, comprising: (a) a valve body having (i) a sleeve portion including a central outlet, and (ii) a slotted portion formed on the sleeve portion and including plural radial inlets, and (b) a valve having (i) an axial portion, and (ii) a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure.
Claim 3
Dependent Claim
23 words
The assembly as recited in claim 1, wherein the valve body and the valve are integrally molded as a one piece plastic member.
Claim 4
Dependent Claim
17 words
The assembly as recited in claim 1, wherein the valve body is separately molded from plastic material.
Claim 5
Dependent Claim
16 words
The assembly as recited in claim 3, wherein the valve is separately molded from plastic material.
Claim 6
Dependent Claim
18 words
The assembly as recited in claim 4, further comprising means for connecting the valve body and the valve.
Claim 7
Dependent Claim
15 words
The assembly as recited in claim 5, wherein the connecting means comprises an interference fit.
Claim 8
Dependent Claim
38 words
The assembly as recited in claim 6, wherein the interference fit comprises an annular rib formed on an inner cylindrical surface of the sleeve portion and a complementary annular groove formed in the axial portion of the valve.
Claim 9
Dependent Claim
28 words
The assembly as recited in claim 7, wherein an edge of the rib and an edge of the axial portion of the valve are bevelled to facilitate connection.
Claim 10
Dependent Claim
25 words
The assembly as recited in claim 1, wherein the radial portion of the valve is acutely angled relative to the axial portion of the valve.
Claim 11
Dependent Claim
23 words
The assembly as recited in claim 1, further comprising an antidrain back valve integrally formed of the sleeve portion of the valve body.
Claim 12
Dependent Claim
22 words
The assembly as recited in claim 1, further comprising a separate antidrain back valve attached to the sleeve portion by connecting means.
Claim 13
Dependent Claim
122 words
A fluid filter, comprising: (a) a casing having a closed end and an open end; (b) an end member connected to the casing at the open end thereof and having a central fluid outlet and plural fluid inlets disposed around the central outlet; (c) a pressure relief valve assembly, including: (i) a valve body having a sleeve portion including a central outlet, and a slotted portion formed on the sleeve portion and including plural radial inlets, and (ii) a valve having an axial portion, and a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure.
Claim 14
Dependent Claim
122 words
A fluid filter, comprising: (a) a casing having a closed end and an open end; (b) an end member connected to the casing at the open end thereof and having a central fluid outlet and plural fluid inlets disposed around the central outlet; (c) a pressure relief valve assembly, including: (i) a valve body having a sleeve portion including a central outlet, and a slotted portion formed on the sleeve portion and including plural radial inlets, and (ii) a valve having an axial portion, and a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure.
Claim 15
Dependent Claim
23 words
The filter as recited in claim 1, wherein the valve body and the valve are integrally molded as a one piece plastic member.
Claim 16
Dependent Claim
17 words
The filter as recited in claim 12, wherein the valve body is separately molded from plastic material.
Claim 17
Dependent Claim
16 words
The filter as recited in claim 14, wherein the valve is separately molded from plastic material.
Claim 18
Dependent Claim
18 words
The filter as recited in claim 12, further comprising: means for connecting the valve body and the valve.
Claim 19
Dependent Claim
15 words
The assembly as recited in claim 16, wherein the connecting means comprises an interference fit.
Claim 20
Dependent Claim
38 words
The filter as recited in claim 17, wherein the interference fit comprises an annular rib formed on an inner cylindrical surface of the sleeve portion and a complementary annular groove formed in the axial portion of the valve.
Claim 21
Dependent Claim
28 words
The filter as recited in claim 18, wherein an edge of the rib and an edge of the axial portion of the valve are bevelled to facilitate connection.
Claim 22
Dependent Claim
25 words
The filter as recited in claim 12, wherein the radial portion of the valve is acutely angled relative to the axial portion of the valve.
Claim 23
Dependent Claim
23 words
The filter as recited in claim 12, further comprising an antidrain back valve integrally formed of the sleeve portion of the valve body.
Claim 24
Dependent Claim
22 words
The filter as recited in claim 12, further comprising a separate antidrain back valve connected to the valve body by connecting means.
Claim 25
Dependent Claim
136 words
A fluid filter, comprising: (a) a plastic casing having a closed end and an open end; (b) a plastic end member connected to the casing at the open end thereof and having a central fluid outlet and plural fluid inlets disposed around the central outlet; (c) a plastic pressure relief valve assembly, including: (i) a valve body having a sleeve portion including a central outlet, and a slotted portion formed on the sleeve portion and including plural radial inlets, and (ii) a valve having an axial portion, and a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure, and (d) a plastic antidrain back valve on the valve body.
Claim 26
Dependent Claim
136 words
A fluid filter, comprising: (a) a plastic casing having a closed end and an open end; (b) a plastic end member connected to the casing at the open end thereof and having a central fluid outlet and plural fluid inlets disposed around the central outlet; (c) a plastic pressure relief valve assembly, including: (i) a valve body having a sleeve portion including a central outlet, and a slotted portion formed on the sleeve portion and including plural radial inlets, and (ii) a valve having an axial portion, and a radial portion normally in a seated position over the radial inlets and being flexible away from the seated position to a non-seated position in response to fluid flowing through the radial inlets at a predetermined pressure, and (d) a plastic antidrain back valve on the valve body.
References Cited (Backward Citations)
US2734636A
Cited
US2439936A
Cited
US2888141A
Cited
US2995249A
Cited
US3187896A
Cited
US3221880A
Cited
US3146194A
Cited
US3235085A
Cited
US3156259A
Cited
GB982466A
Cited
US3231089A
Cited
US3305095A
Cited
US3272342A
Cited
US3369666A
Cited
US3315809A
Cited
US3473664A
Cited
US3640390A
Cited
US3567023A
Cited
US3589517A
Cited
US3586171A
Cited
US3529722A
Cited
US3618775A
Cited
US3608724A
Cited
US3669144A
Cited
US3633750A
Cited
US3695437A
Cited
US3724665A
Cited
US3855128A
Cited
US4084606A
Cited
US3928201A
Cited
US3957640A
Cited
US4035306A
Cited
CA1075167A
Cited
US4028243A
Cited
US4045349A
Cited
US4144168A
Cited
US4497706A
Cited
US4764275A
Cited
US4696322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |