US3886072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter retainer and bypass valve assembly
Assignee: Caterpillar Inc
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Filing: 1973-04-30
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Granted: 1975-05-27
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Expires: 1993-04-30
Abstract
Abstract A filter assembly includes a housing within which is disposed a filter element. Inlet means direct fluid to the filter, through which such fluid normally flows. The fluid then normally flows through outlet means defined by the housing. The fluid flowing through the inlet means is in communication with a valve including a valving element movable toward the filter element to allow fluid to flow from the inlet means to the outlet means, bypassing the filter element. A helical spring is disposed between the valving element and filter element to bias the valving element in a position so that the fluid is normally directed through the filter element. An increase of the fluid pressure in the filter element moves the valve element toward the filter element against the resilience of the spring, so that the fluid bypasses the filter element.
Inventors
- 👤 Joseph E Dezelan
- 👤 John A Junck
- 👤 Neil W Kroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
333 words
A filter assembly comprising: a housing comprising a housing body and an end cover, and including fluid inlet and outlet means; said inlet means comprising an inlet pipe an annular filter element within said housing adjacent the end cover; fluid directing means for directing the fluid from the fluid inlet pipe through the filter element and comprising a tubular member having one end portion thereof surrounding and in contact with said inlet pipe, and the opposite end adjacent the filter element, said one end being flared; valve means associated with said tubular member and comprising a tubular valving element movable to a first position away from the filter element so that the fluid directing means direct fluid from the fluid inlet pipe through the filter element, and movable away from the first position toward the filter element to allow fluid to flow from the fluid inlet means to the fluid outlet means, bypassing the filter element; ring means slidably mounted about said tubular member adjacent said opposite end thereof, said tubular valving element; resilient means interposed the valving element and the ring means urging the valve means and the ring means towards opposite ends of said tubular member, with the valving element being urged about said tubular member, means associated with said valve seat member and said flared end of the tubular member to prevent the sliding of said valve seat member and said valving element off said tubular member, retaining means disposed on said tubular member adjacent said opposite end thereof to prevent said ring means from sliding off of the opposite end of said tubular member, the tubular member defining passage means to allow fluid in the tubular member to reach the valving element and valve seat member to subject them to fluid pressure introduced through the fluid inlet pipe to the filter element, the valving element and valve seat member being configured so that the valving element moves toward the filter element upon fluid pressure buildup in the filter element.
Claim 2
Dependent Claim
333 words
A filter assembly comprising: a housing comprising a housing body and an end cover, and including fluid inlet and outlet means; said inlet means comprising an inlet pipe an annular filter element within said housing adjacent the end cover; fluid directing means for directing the fluid from the fluid inlet pipe through the filter element and comprising a tubular member having one end portion thereof surrounding and in contact with said inlet pipe, and the opposite end adjacent the filter element, said one end being flared; valve means associated with said tubular member and comprising a tubular valving element movable to a first position away from the filter element so that the fluid directing means direct fluid from the fluid inlet pipe through the filter element, and movable away from the first position toward the filter element to allow fluid to flow from the fluid inlet means to the fluid outlet means, bypassing the filter element; ring means slidably mounted about said tubular member adjacent said opposite end thereof, said tubular valving element; resilient means interposed the valving element and the ring means urging the valve means and the ring means towards opposite ends of said tubular member, with the valving element being urged about said tubular member, means associated with said valve seat member and said flared end of the tubular member to prevent the sliding of said valve seat member and said valving element off said tubular member, retaining means disposed on said tubular member adjacent said opposite end thereof to prevent said ring means from sliding off of the opposite end of said tubular member, the tubular member defining passage means to allow fluid in the tubular member to reach the valving element and valve seat member to subject them to fluid pressure introduced through the fluid inlet pipe to the filter element, the valving element and valve seat member being configured so that the valving element moves toward the filter element upon fluid pressure buildup in the filter element.
Claim 3
Dependent Claim
26 words
The filter assembly of claim 1 and further comprising a fluid retainer tank and wherein said fluid retainer tank comprises said housing body and end cover.
Claim 4
Dependent Claim
38 words
The filter assembly of claim 1 and further comprising a screen member associated with the housing, through which the fluid which flows from the fluid inlet means to the fluid outlet means, bypassing the filter element, is directed.
Claim 5
Dependent Claim
29 words
The filter assembly of claim 3 wherein the annular filter element comprises a tubular filter element having a tubular center bore, the tubular member communicating with the tubular bore.
Claim 6
Dependent Claim
19 words
The filter assembly of claim 4 wherein the resilient member comprises a helical spring disposed about the tubular member.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |