Patent ID: 6827846
Filing Date: 2004-12-07
Classification: B01D

Abstract:
A filter including a canister with a closed end an opposite open end and ports for receiving fluid to be filtered and for discharging filtered fluid; a central standpipe with a distal free end toward the open end of the canister, the distal free end of the standpipe having attachment means; a cover enclosing the open end of the canister and having a central opening; and a filter element in the canister for filtering the fluid; and further including an indicator handle assembly, the indicator handle assembly having a body with:i) a collar extending through the central opening in the cover with corresponding attachment means which cooperates with the attachment means of the standpipe, and a handle extending through the body which can be manually manipulated by the operator to attach the indicator handle assembly to the standpipe; and ii) a device supported for movement within the indicator handle body in response to fluid pressure in said standpipe, said device providing an indication as to when fluid pressure in the standpipe falls below a predetermined value indicating that the filter element is spent and needs to be replaced with a fresh element, wherein the handle engages the device and axially guides the device within the body and prevents relative rotation of the device with respect to the body.