Back to results
US 7,029,198 B1Granted
Grading rake
AssigneesMichael E. Cotto, John D. Bambara
InventorMicheal E. Cotto
Life of this patent
Estimating the term…
Abstract
A grading rake having a handle and a rake head, and having stiff but bendable, flexible polymer tines in the rake head, with the tines angled back toward the handle, and with the end of the tines truncated and parallel to the plane of the handle and rake head.
Claims24
A grading rake, comprising:
- a handle having a first and a second end;
- a holder secured to the second end of the handle;
- an elongate rake head secured in a fixed position in relation to the handle by the holder;
- and
- a plurality of linear tines extending from the rake head for grading particulate matter, wherein an interior angle between the plurality of tines and the handle is fixed and ranges from about thirty degrees to about sixty degrees;
- wherein the plurality of tines include a truncated end surface forming an angle with a longitudinal axis of the handle ranging from about plus ten degrees to negative ten degrees.
3 more elements
A grading rake, comprising:
- a handle having a first end and a second end;
- a holder secured to the second end of the handle;
- a substantially cylindrical rake head substantially perpendicularly secured to the handle by the holder;
- and
- a plurality of tines extending from holes in the rake head having respective truncated end surfaces, wherein an interior angle between the plurality of tines and the handle ranges from about thirty degrees to about sixty degrees and an angle between the truncated end surfaces and the handle ranges from minus ten degrees and positive ten degrees.
2 more elements
A method of grading particulate matter, comprising:
- pushing particulate matter with a grading rake;
- and
- pulling the particulate matter with the grading rake such that cylindrical nylon tines extending from a rake head flex from about 0.5 inch to about 1 inch at a free end such that the tines separate relatively large particles from smaller particles, wherein a truncated end surface of the tines travels across a surface of the particulate matter,
- wherein the truncated end surfaces form an angle with a handle of the grading rake ranging from about positive ten degrees and minus ten degrees, and the plurality of tines form an interior angle with a handle of the rake ranging from about thirty degrees to about sixty degrees.
1 more element
Dependencies are inferred from the claim text.