# US 2021/0275956 A1 · Filter elements, coalescing baffles, filtration vessel and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0275956 A1 - Document ID: US20210275956A1 - Status: Published application - Kind: A1 - Application number: 17/328,074 - Filed: 2021-05-24 - Published: 2021-09-09 - Earliest claimed: 2013-06-24 - Assignees: Parker-Hannifin Corporation - Inventors: Daniel M. Cloud; Stephen Gregory Jeane; Jack David Bums - Web page: https://patentgrep.com/patent/US20210275956A1 ## CPC - B01D 46/0031: {with collecting, draining means} - B01D 46/24: Particle separators, e.g. dust precipitators, using rigid hollow filter bodies - B01D 46/2403: {characterised by the physical shape or structure of the filtering element} - B01D 46/2411: {Filter cartridges} - B01D 46/2414: {End caps including additional functions or special forms} - B01D 46/521: {using folded, pleated material} - B01D 46/58: connected in parallel - B01D 46/62: connected in series - B01D 46/64: arranged concentrically or coaxially - B01D 2265/021: Anti-rotational means - B01D 2265/026: with means for avoiding false mounting - B01D 2271/027: Radial sealings - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract Improvements to filtration and vessels such as for filtration and coalescing of gas streams are shown. A filter element with a partial treated region and untreated region such as providing different surface energies or other filtration characteristics are provided. Various keying arrangements for compatibility and/or rotational locking are shown between the filtration vessel, a tubular coalescing baffle, and/or filter element. The tubular coalescing baffle also may include non-louvered pore structure, which provides for more even flow in a two stage type filtration vessel to prevent premature exiting and reduction of flow velocities along the second stage, and/or may additionally or alternatively include drainage apertures such as drain slot formed along a gravitational bottom or otherwise to facilitate additional drainage of coalesced liquid as opposed to letting such liquid be forced through fluid velocity toward the open end of the tubular baffle. ## Claims ### Claim 1 A filter element configured for receipt into a keyed tubular baffle having a tubular extension defining a plurality of pores, the tubular extension comprises first and second open ends, a cap portion coupled to one of the first and second open ends, the cap portion comprising an end plate with a post projecting from one side that provides a hollow receiver, a key projection along the post and projecting inwardly in the hollow receiver, the filter element comprising: a tubular filter media extension with an internal central flow passage having a first stage end and a second stage end, the second stage end sized to be received within the tubular baffle; a seal disposed along the tubular filter media extension between the first stage end and the second stage end to separate a first filter stage and a second filter stage; a first stage end cap closing the first stage end of the tubular filter media extension; a second stage end cap closing the second stage end of the tubular filter media extension, the second stage end cap; and means at the second stage end cap for clearing the key projection to allow the filter element to interfit with the keyed tubular baffle. ### Claim 2 (depends on 1) The filter element of claim 1, wherein the clearing means is configured to avoid keying with the key projection. ### Claim 3 (depends on 2) The filter element of claim 2, wherein the second stage end cap is free of a mounting post to provide the clearing means. ### Claim 4 (depends on 1) The filter element of claim 1, wherein the second stage end cap is configured to rest on the tubular baffle along at least one of the cap portions and the tubular extension when installed into the tubular baffle. ### Claim 5 (depends on 1) The filter element of claim 1, wherein the second end cap comprises a mounting post that is sufficiently smaller than the hollow receiver with the key projection projecting inwardly in the hollow receiver to be able to clear the key projection and to be received into the hollow receiver. ### Claim 6 (depends on 5) The filter element of claim 5, wherein the mounting post is circular. ### Claim 7 (depends on 5) The filter element of claim 5, wherein the mounting post is rectangular. ### Claim 8 (depends on 1) The filter element of claim 1, further comprising a handle on the first stage end cap. ### Claim 9 (depends on 1) The filter element of claim 1, wherein the tubular filter media extension is either: (a) a single continuous extension of filter media; or (b) a composite of at least two filter sections. ### Claim 10 (depends on 1) A filter and baffle assembly comprising the filter element of claim 1 in combination with the tubular baffle. ### Claim 11 (depends on 10) A multiple stage filter element assembly comprising the filter and baffle assembly of claim 10, and further comprising: a filtration vessel; a partition dividing the filtration vessel the filtration vessel into a first stage and a second stage, at least one opening in the partition; an inlet port in fluid communication with the first stage; an outlet port in fluid communication with the second stage; the filter element disposed in the vessel and extending through the partition, the tubular baffle surrounding the filter element and being secured by a support grid, the support grid providing a mounting opening receiving the post and a corresponding key keying with the tubular baffle, wherein the key rotationally locks the tubular baffle relative to the filtration vessel, providing a predetermined orientation to the tubular baffle. ### Claim 12 A filter element, adapted for receipt into a tubular baffle that has a post with a cavity with an inward projecting detent, the filter element comprising: a filter media with an internal central flow passage therein; first and second stage portions of the filter media; a pair of end caps, each of the end caps closing a different one of the first and second stage portions; a seal spaced from the first and second stage end caps and separating the first stage portion and the second stage portion; and wherein the second stage end cap comprises a mounting post, wherein a clearance void is formed into the mounting post and configured to receive the inward projecting detent. ### Claim 13 (depends on 12) The filter element of claim 12, wherein the clearance void comprises a groove. ### Claim 14 (depends on 13) The filter element of claim 13, wherein the clearance void comprises a flat or other non-round key structure. ### Claim 15 (depends on 12) The filter element of claim 12, wherein the mounting post comprises a circular surface, and further comprise a detent formed into the mounting post that disrupts the circular surface and extends axially along the circular surface. ### Claim 16 (depends on 12) The filter element of claim 12, wherein the first and second stage portions are unitarily formed with each other. ### Claim 17 (depends on 12) The filter element of claim 12, wherein the first and second stage portions are provided as separate first stage and second stage elements. ### Claim 18 A filter element, comprising: a filter media with an internal central flow passage therein; first and second stage portions of the filter media; a pair of end caps, each of the end caps closing a different one of the first and second stage portions; a seal spaced from the first and second stage end caps and separating the first stage portion and the second stage portion; and a mounting post provided by one of the end caps, wherein a detent is formed into the mounting post and extends axially along an outwardly facing surface of the mounting post. ### Claim 19 (depends on 18) The filter element of claim 18, wherein the mounting post projects centrally from a plate portion of the one of the end caps, the plate portion closing the internal central flow passage. ### Claim 20 (depends on 18) The filter element of claim 18, wherein the detent comprises a groove. ### Claim 21 (depends on 18) The filter element of claim 18, wherein the detent comprises a flat or other non-round key structure. ### Claim 22 (depends on 18) The filter element of claim 18, further comprising a second mounting post provided by a second of the end caps, the second mounting post projecting axially. ### Claim 23 (depends on 18) The filter element of claim 18, wherein the mounting post includes a body with a tapered tip, the body connected to a plate portion of the end cap and spacing the tapered tip away from the plate portion, wherein the detent extends both in the tapered tip and the body. ### Claim 24 (depends on 18) The filter element of claim 18, further comprising an orientation device a second of the end caps arranged at a predetermined orientation relative to the detent to provide an indication of angular position of the detent.