# US 4,394,147 A · Internally supported filter

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- Number: US 4,394,147 A
- Document ID: US4394147A
- Status: Granted
- Kind: A
- Application number: 06/325,756
- Filed: 1981-11-30
- Granted: 1983-07-19
- Earliest claimed: 1981-11-30
- Assignees: Allis-Chalmers Corporation
- Inventors: John A. Caddy; William A. Putman
- Web page: https://patentgrep.com/patent/US4394147A

## CPC

- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D 46/4227: {Manipulating filters or filter elements, e.g. handles or extracting tools}
- 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

An internally supported composite filter having a wire-like frame, two confronting sheets of filter media secured to the frame, a ring of adhesive at the center of the sheets secures their confronting faces together in a relatively uncompacted fashion, and a handle secured to the sheets proximate one of the corners of the frame which can be grasped by a workman to remove the filter from the mounting structure in a peel-away fashion.

## Claims

### Claim 1

An internally supported composite filter having a single handle adapted to be removably secured in a flow-through mounting structure for separating particulate materials from a gas stream flowing through the mounting structure, comprising:
a closed loop of relatively rigid material forming a thin wire-like frame having a pair of opposing side portions;
two confronting sheets of filter media having substantially the same peripheral shape as said frame and being secured thereto, said frame being positioned between said sheets inwardly of their outer peripheries;
fastening means securing said sheets together in a relatively uncompacted fashion proximate the center of the sheets to retard bulging of the filter during filtering operations; and
said handle being formed of a flexible strip, said handle having one end secured to one of said side portions and a free end adapted to be grasped by a workman to accommodate removing the filter by pulling the strip which causes the filter to pivot about the other side portion to peel it out of the mounting structure in a pivotal sliding fashion, thereby essentially minimizing shaking of the filter when the workman removes it from the mounting structure.

### Claim 2 (depends on 1)

The composite filter according to claim 1, and
said frame being of a generally rectangular configuration.

### Claim 3 (depends on 1)

The composite filter according to claim 1, and
said fastening means being a ribbon of glue bonding the confronting faces of said sheets together.

### Claim 4 (depends on 1)

The composite filter according to claim 1, and
said one end forming a loop passing through said sheets and encircling said frame to loosely secure the strip to the sheets.

### Claim 5 (depends on 1)

The composite filter according to claim 1, and
said handle extending from the frame to the peripheral edge of the filter media between the two confronting sheets of media.