Gas concrete saw filtration system
AssigneeBlack & Decker Inc.
InventorsErik Ekstrom, Craig A. Schell, William Kalbfleisch, Eric L. Bernstein
Life of this patent
Estimating the term…
Abstract
A filtration system for a gas powered concrete saw allows the user to inspect and/or determine how much dust is accumulated in the filter. In addition, manual filter cleaners are provided to allow the user to easily clean the filter without needing to open up the tool. In addition, the system is provided to deactivate the tool or notify the user if no filter is being utilized, or the filter is damaged. The system can also provide system lock out in the case of a missing or damaged filter. In addition, automatic methods are also provided to allow cleaning of the filter.
Claims15
A system comprising:
- a source of rotary motive power;
- an air intake structure at least partially defining an air intake passage in fluid communication with said source of rotary motive power;
- a filter support structure having an inlet and an outlet in fluid communication with said air intake passage, said filter support structure being axially movable relative to said air intake passage;
- a filter mounted to said filter support structure and disposed between said inlet and said outlet;
- a resiliently compressible member disposed between said filter support structure and said air intake structure and biasing said filter support structure axially away from said air intake passage;
- a scale having indicia of a condition of said filter;
- and
- an indicator connected to said filter support structure and movable relative to said scale,
- wherein said filter support structure moves axially relative to said air intake passage in response to a change in a pressure differential across said filter and causes corresponding movement of said indicator relative to said scale to indicate said condition of said filter.
A power tool comprising:
- a material removal tool;
- an internal combustion engine transmitting power to said material removal tool;
- an air intake structure at least partially defining an air intake passage in fluid communication with said internal combustion engine;
- a filter support structure having an inlet and an outlet in fluid communication with said air intake passage;
- a filter mounted to said filter support structure and disposed between said inlet and said outlet;
- and
- means for indicating a cleanliness level of said filter.
Dependencies are inferred from the claim text.