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US4042508A Expired / Lapsed US ⏱️ 0.0 years remaining

Filter holding means

Assignee: Caterpillar Inc
•
Filing: 1976-08-30
•
Granted: 1977-08-16
•
Expires: 1996-08-30
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Abstract

Abstract The invention is concerned with an improvement in a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second side of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank. The improvement comprises a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes after passage thereof from the interior to an exterior of said element means, a first end of said tube sealing adjacent said second side of said tank and a second end of said tube sealing adjacent said first side of said tank. Also part of the improvement is an opening through the second side of the tank to an interior of the tube adjacent the first end thereof sized to allow entry of the element means to the interior of the tube. Cover means are provided sealingly attachable over the opening and attachable longitudinally through the tube to adjacent the first side of the tank. Extending means extend from the cover means toward the first side of the tank within the tube. Compressible spring means supported by the extending means compress the element means toward adjacent the first side of the tank. Means are also provided for preventing the spring means from sliding away from the extending means.

Inventors

  • 👤 Eugene E. Latimer
  • 👤 John B. Waggoner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 03:49
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/027

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 262 words
In a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second side of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank, an improvement comprising: a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes into said reservoir after passage thereof from the interior to an exterior of said element means, a first end of said tube sealing adjacent said second side of said tank and a second end of said tube sealing adjacent said first side of said tank; an opening through said second side of said tank to an interior of said tube adjacent said first end thereof, said opening being sized to allow entry of said element means to the interior of said tube; cover means sealingly attachable over said opening by rod means attached longitudinally through said tube to said first side of said tank; a collar generally coaxially surrounding said rod means and extending from said cover means towards said first side of said tank within said tube; compressible spring means surrounding said collar and compressing said element means towards said first side of said tank; and retaining means for holding said spring means on said collar.
Claim 2
Dependent Claim 262 words
In a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second side of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank, an improvement comprising: a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes into said reservoir after passage thereof from the interior to an exterior of said element means, a first end of said tube sealing adjacent said second side of said tank and a second end of said tube sealing adjacent said first side of said tank; an opening through said second side of said tank to an interior of said tube adjacent said first end thereof, said opening being sized to allow entry of said element means to the interior of said tube; cover means sealingly attachable over said opening by rod means attached longitudinally through said tube to said first side of said tank; a collar generally coaxially surrounding said rod means and extending from said cover means towards said first side of said tank within said tube; compressible spring means surrounding said collar and compressing said element means towards said first side of said tank; and retaining means for holding said spring means on said collar.
Claim 3
Dependent Claim 39 words
An improvement as in claim 1, wherein said spring means comprises axially compressible resilient washer means about said collar and said retaining means comprises a retaining washer about said collar intermediate said resilient washer means and said element means.
Claim 4
Dependent Claim 45 words
An improvement as in claim 2, wherein said cover means comprises a cover and said rod means comprises bolt means passing sealingly therethrough, said bolt means passing through said tube and through said element means and being attached to said first side of said tank.
Claim 5
Dependent Claim 44 words
An improvement as in claim 3, wherein said retaining means further comprises a retaining ring fitting within a groove in said collar, said retaining ring extending peripherally outwardly from said groove about said collar further removed from said cover than is said retaining washer.
Claim 6
Dependent Claim 19 words
An improvement as in claim 4, wherein said resilient washer means comprises a plurality of axially compressible resilient washers.

References Cited (Backward Citations)

US2220706A Cited
US2811218A Cited
US3161589A Cited
US3476252A Cited
US3653512A Cited
US3750888A Cited
US3883430A Cited
US3900400A Cited
US3959141A Cited
US3928201A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-08-15 1981-02-14 1981-08-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-08-15 1985-02-14 1985-08-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-08-15 1989-02-14 1989-08-16 $7700.00 Window Closed / Lapsed

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