Safety door for rotary kiln
AssigneeMitsubishi Cement Corporation
InventorsDerek W. Couse, Manuel Sandoval
Life of this patent
Estimating the term…
Abstract
A safety door for covering openings in a rotary kiln during maintenance operations on the rotary kiln. The door is affixed to the exterior surface of the rotary kiln and includes a hatch pivotally secured at one side edge thereof by a pivot rod to a frame. A plurality of tension coil springs are disposed on the pivot rod and continuously bias the hatch toward the opening with a force of approximately 400 pounds.
Claims18
A safety door for temporarily covering a manhole formed in a rotary kiln by removing a door during kiln maintenance operations comprising:
- (a) a hollow cylindrical rotary kiln having an interior and an exterior surface and a diameter large enough for an adult person to stand up inside the kiln;
- (b) first and second retainer plates, each defining at least one aperture, secured to the exterior surface of said kiln on opposite sides of said manhole:
- (c) a frame having first, second, third and fourth sides;
- (d) said frame defining at least one additional aperture in opposite sides thereof for alignment with said at least one aperture in each of said retainer plates:
- (e) fasteners extending through said aligned apertures for securing said frame to said retainer plates;
- (f) a hatch;
- (g) means for pivotally securing said hatch to said frame;
- and
- (h) means for continuously biasing said hatch toward said kiln exterior surface with a force sufficient to support approximately four hundred pounds placed on said hatch.
(canceled)
(canceled)
The safety door as defined in claim 17 which further includes means for mechanically latching said hatch to said frame.
A safety door for temporarily covering a manhole formed in a rotary kiln by removing a door during kiln maintenance operations comprising:
- (a) a hollow cylindrical rotary kiln having an interior and an exterior surface and a diameter large enough for an adult person to stand up inside the kiln;
- (b) a frame having first, second, third and fourth sides;
- (c) a plurality of openings defined by said frame sides;
- (d) a plurality of bolts secured to said kiln exterior surface adjacent said manhole, said bolts being received in said openings defined by said frame sides;
- (e) nuts secured to said bolts;
- (f) a hatch;
- (g) means for pivotally securing said hatch to said frame;
- and
- (h) means for continuously biasing said hatch toward said kiln exterior surface with a force sufficient to support approximately four hundred pounds placed on said hatch.
A safety door for temporarily covering a manhole formed in a rotary kiln by removing a door during kiln maintenance operations comprising:
- (a) a hollow cylindrical rotary kiln having an interior and an exterior surface and a diameter large enough for an aduh person to stand up inside the kiln;
- (b) a plurality of members extending outwardly from the exterior surface of said kiln adjacent said manhole;
- (c) a frame having first, second, third and fourth sides;
- (d) means for attaching said frame to the members extending outwardly from the exterior surface of said kiln;
- (e) a hatch;
- (f) means for pivotally securing said hatch to said frame;
- and
- (g) means for continuously biasing said hatch toward said kiln exterior surface with a force sufficient to support approximately four hundred pounds placed on said hatch.
Dependencies are inferred from the claim text.