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US3402531A Expired / Lapsed US ⏱️ 0.0 years remaining

Paper filter for locomotives and method of assembly

Assignee: Farr Co
•
Filing: 1966-08-04
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Granted: 1968-09-24
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Expires: 1986-08-04
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Abstract

Abstract 1,169,286. Air filter. FARR CO. 3 Aug., 1967 [4 Aug., 1966], No. 35792/67. Heading BIT. An air filter element comprises six pleated paper filter panels 30-35 arranged in zigzag configuration in an integral housing comprising top, bottom and front 28, which have openings into inlet spaces 52, 53 between alternate pairs of panels, and rear- 29 with openings (55-57) into the outlet spaces (Figs. 3, 4, not shown). Each panel is reinforced by a perforated paper sheet glued thereto on each face, by string (46) on the upstream face (Fig. 8, not shown) and by cardboard wedges 40- (45) glued between panels in outlet spaces. Twelve elements are stacked in two horizontal rows of six to filter air for the intake of a diesel-electric locomotive diesel engine. Protuberances (71-74, 76, 77) on tops and bottoms of elements facilitate sliding into place, and the elements are then clamped by a common frame (81) against a common outlet plenum (63) (Fig. 5 not shown). The elements are so shaped as to form wedge-shaped inlet spaces 58, 59 therebetween. The filter compartment of the locomotive (Fig. 2, not shown) has an access door and includes preliminary inertial separators (12, 13) whose separated dust is discharged by fan (14). Some of the air from the separators passes through the filter elements to the engine, the rest is delivered by a fan 17 to cool the electric generator and traction motors.

Inventors

  • 👤 Richard S Farr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 20:40
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/10; B01D46/12; B01D46/121; B61; B61C; B61C17/00; B61C17/04; B61C5/00; B61C5/02; F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; B01D2279/00; B01D2279/60

Claims Analysis

Total Claims: 0
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-09-24 1972-03-25 1972-09-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-09-24 1976-03-25 1976-09-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-09-24 1980-03-25 1980-09-24 $7700.00 Window Closed / Lapsed

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