A sifting shovel for sifting particulate matter from a volume of material comprising a shovel head and a handle with an end fixed to the shovel head. The shovel head has a base plate, a sifting plate disposed in spaced relation relative to the base plate, a first side wall, a second side wall, and a
A sifting shovel for sifting particulate matter from a volume of material comprising a shovel head and a handle with an end fixed to the shovel head. The shovel head has a base plate, a sifting plate disposed in spaced relation relative to the base plate, a first side wall, a second side wall, and a proximal end wall. The sifting plate has a plurality of apertures therein, and the base plate, the sifting plate, and the first and second side walls have distal ends that together define an open mouth of the shovel head. The open mouth can have a minimum opening height greater than a maximum aperture dimension, and the shovel head can have a truncated wedge shape. At least a portion of the handle can be disposed below a longitudinal center of gravity of the sifting shovel, such as by forming a bend in the handle, to enable the sifting shovel to tip automatically.
대표청구항▼
I claim as deserving the protection of Letters Patent: 1. A sifting shovel for sifting particulate matter from a volume of material, the sifting shovel comprising: a shovel head with a base plate, a sifting plate fixed in relation to the base plate, a first side wall, a second side wall, and a prox
I claim as deserving the protection of Letters Patent: 1. A sifting shovel for sifting particulate matter from a volume of material, the sifting shovel comprising: a shovel head with a base plate, a sifting plate fixed in relation to the base plate, a first side wall, a second side wall, and a proximal end wall wherein the sifting plate has a plurality of apertures therein, wherein the base plate, the first and second side walls, and the rear wall together define a reception volume for retaining a volume of material, wherein the base plate, the sifting plate, and the first and second side walls have distal ends that together define an open mouth of the shovel head; and an elongate handle with a proximal end fixed to the shovel head for enabling control and manipulation of the sifting shovel wherein the handle has a substantially round cross section, a bend adjacent to the proximal end of the handle, and a substantially straight portion from the bend to adjacent to a distal end of the handle, and wherein the bend angles the substantially straight portion of the handle to a sifting plate side of the shovel head; whereby the shovel head can be inserted into a volume of material, material smaller than a given size can be sifted through the apertures and into the reception volume, and material greater than a given size can be prevented from being sifted through the apertures. 2. The sifting shovel of claim 1 wherein the apertures have a maximum aperture dimension, wherein the open mouth of the sifting shovel has a minimum opening height, and wherein the minimum opening height is greater than the maximum aperture dimension. 3. The sifting shovel of claim 2 wherein the minimum opening height is at least ⅛ inches larger than the maximum aperture dimension. 4. The sifting shovel of claim 2 wherein the minimum opening height is substantially consistent. 5. The sifting shovel of claim 2 wherein the apertures are substantially consistent in size and shape. 6. The sifting shovel of claim 5 wherein the apertures are diamond shaped. 7. The sifting shovel of claim 1 wherein the shovel head has a height that increases from a distal tip of the shovel head to a proximal end of the shovel head whereby the shovel head has a truncated wedge shape. 8. The sifting shovel of claim 7 wherein the height of the shovel head increases at a pitch of approximately 4.5 degrees. 9. The sifting shovel of claim 1 wherein the first and second side walls and the rear wall are disposed substantially perpendicularly to the base plate. 10. The sifting shovel of claim 9 wherein the first and second side walls and the rear wall meet the base plate at inside angles that are radiused. 11. The sifting shovel of claim 1 wherein the base plate has a beveled tip. 12. The sifting shovel of claim 1 wherein the handle is angled in relation to the shovel head at an angle of approximately 11.5 degrees.
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이 특허에 인용된 특허 (7)
Richards George A. (424 Central St. West Action MA 01720), Ash separating shovel.
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