| Class Number |
Class Name |
No. of Patents |
| 37/907 |
Automatic leveling excavators |
51 |
| 37/307 |
Beneath a body of water (e.g., dredger) |
40 |
| 37/314 |
Adapted to excavate specific discrete material |
79 |
| 37/315 |
Shellfish |
12 |
| 37/316 |
Including rake or scoop structure |
25 |
| 37/313 |
By use of submarine or undersea vessel |
38 |
| 37/338 |
Endless |
31 |
| 37/339 |
Specific bucket structure |
1 |
| 37/340 |
Grab |
34 |
| 37/337 |
Rotary digger (e.g., bucket wheel) |
20 |
| 37/341 |
Scoop or bucket |
42 |
| 37/317 |
Suction |
51 |
| 37/333 |
Draghead dredger (e.g., dustpan dredger) |
18 |
| 37/318 |
Having intake screen |
50 |
| 37/319 |
And material size reducer (e.g., crusher) |
13 |
| 37/324 |
Including driven digger adjacent suction inlet (e.g., cutterhead dredger) |
12 |
| 37/332 |
Endless |
4 |
| 37/326 |
Rotary |
17 |
| 37/331 |
Axis longitudinal with respect to suction pipe |
19 |
| 37/329 |
Axis transverse with respect to suction pipe |
47 |
| 37/330 |
Axis vertical with respect to surface of body of water |
12 |
| 37/327 |
Specific cutterhead structure |
11 |
| 37/328 |
Including distinct tooth or tooth mounting |
9 |
| 37/325 |
With specific bearing, or means to lubricate or seal |
14 |
| 37/335 |
Pipe or nozzle structure |
47 |
| 37/336 |
With coupling (e.g., connector) |
16 |
| 37/323 |
With fluid jet digger adjacent suction inlet |
90 |
| 37/321 |
With means to introduce lift agent directly into suction pipe |
35 |
| 37/322 |
With downstream directed jet nozzle |
34 |
| 37/334 |
With pipe suspension or support (e.g., ladder structure) |
30 |
| 37/320 |
With pumping chamber |
39 |
| 37/309 |
With means to control dredger operation (e.g., movement of dredged material) in response to sensed condition |
63 |
| 37/312 |
Control of swing or swing speed |
7 |
| 37/311 |
Suction relief valve |
8 |
| 37/310 |
Swell compensator |
14 |
| 37/342 |
With means to scour or scrape (e.g., propeller means, digging teeth, plow) |
16 |
| 37/344 |
Nozzle |
25 |
| 37/343 |
Rotary digging element |
12 |
| 37/308 |
With signal, scale, indicator, or inspection means |
41 |
| 37/345 |
With vessel, propulsion, or anchor structure (e.g., bank spud, spud brace) |
19 |
| 37/346 |
Bottom spud anchor |
15 |
| 37/901 |
Bucket cleaners |
36 |
| 37/394 |
Cable-operated (e.g., dragline) |
21 |
| 37/395 |
Boom-type |
23 |
| 37/396 |
Including means to control digging, hoisting, and dumping |
35 |
| 37/397 |
Including mounting or support structure (e.g., boom support, sheave or pulley support) |
49 |
| 37/398 |
Scoop or bucket |
31 |
| 37/399 |
Including support or mounting device (e.g., hitch, shackle, lifting or dumping trunion) |
25 |
| 37/400 |
Trolley-supported |
6 |
| 37/401 |
Including cable or rope control means to facilitate loading, transporting, or dumping |
12 |
| 37/908 |
Canal cleaners |
6 |
| 37/461 |
Clamshell bucket |
27 |
| 37/184 |
Common pivot |
17 |
| 37/185 |
Crossed lever |
5 |
| 37/186 |
Contiguous pivots |
15 |
| 37/188 |
Link-connected |
6 |
| 37/187 |
Spaced pivots |
30 |
| 37/403 |
Combined or convertible |
269 |
| 37/406 |
Combined with clamp, grapple, or shear |
98 |
| 37/405 |
Combined with fork or rake |
54 |
| 37/404 |
Combined with subsoiler |
56 |
| 37/468 |
Having quick-connect coupling |
236 |
| 37/407 |
With scraper |
63 |
| 37/408 |
Integrally mounted to a tool body and independently usable by re- positioning the tool body |
27 |
| 37/409 |
Multicomponent tool (e.g., scoop or bucket) convertible by relative movement of tool parts |
39 |
| 37/410 |
Separate tools simultaneously mounted and independently usable |
47 |
| 37/446 |
Digging edge |
71 |
| 37/448 |
Corner guard (e.g., corner tooth) |
35 |
| 37/451 |
Distinct wear element mounted between teeth |
23 |
| 37/447 |
Oscillating or reciprocating |
22 |
| 37/450 |
Removable digging edge having integral tooth adaptor |
42 |
| 37/449 |
Repositionable digging edge (e.g., reversible) |
18 |
| 37/460 |
Specific material (e.g., specialty steel, heat treatment of material, specific hardness test) |
57 |
| 37/452 |
Tooth or adaptor |
96 |
| 37/453 |
Having wear cap |
38 |
| 37/455 |
Mounting or retaining means |
115 |
| 37/456 |
Including pin or key |
100 |
| 37/457 |
Having resilient elastomeric element |
90 |
| 37/458 |
Having resilient metallic element |
62 |
| 37/459 |
Wire or rod formed |
20 |
| 37/454 |
Repositionable or replaceable tooth (e.g., reversible) |
35 |
| 37/142.5 |
Ditch filler |
110 |
| 37/347 |
Ditcher |
48 |
| 37/348 |
Condition responsive |
285 |
| 37/352 |
Having endless digger |
74 |
| 37/353 |
Endless bucket |
11 |
| 37/355 |
Longitudinal cut |
23 |
| 37/362 |
Drive-related feature |
24 |
| 37/363 |
Hand operated |
13 |
| 37/358 |
Reciprocating endless digger |
2 |
| 37/357 |
With distinct rotary digger |
20 |
| 37/359 |
With longitudinal endless conveyor |
7 |
| 37/356 |
With side cutters |
4 |
| 37/360 |
With transverse endless conveyor |
13 |
| 37/361 |
Drive-related feature |
3 |
| 37/354 |
Transverse cut |
0 |
| 37/350 |
Having screw digger |
18 |
| 37/351 |
With conveyor |
13 |
| 37/366 |
Plow |
16 |
| 37/370 |
Mole plow |
27 |
| 37/367 |
Slit ditcher |
47 |
| 37/368 |
Including longitudinal endless conveyor |
2 |
| 37/369 |
And transverse endless conveyor |
1 |
| 37/378 |
With colter |
1 |
| 37/373 |
With conveyor |
2 |
| 37/375 |
Longitudinal endless conveyor |
1 |
| 37/376 |
And transverse endless conveyor |
1 |
| 37/377 |
With colter |
0 |
| 37/374 |
Wheel and belt |
3 |
| 37/372 |
With plow supported wheel or supported on wheel frame |
3 |
| 37/379 |
Shovel or scoop |
52 |
| 37/380 |
Slit ditcher |
8 |
| 37/91 |
Wheel excavator |
43 |
| 37/92 |
Longitudinal axis |
10 |
| 37/93 |
Conveyor |
10 |
| 37/94 |
Transverse axis |
65 |
| 37/95 |
Conveyor |
10 |
| 37/96 |
Longitudinal endless |
18 |
| 37/97 |
Transverse endless |
18 |
| 37/349 |
With crumber |
13 |
| 37/364 |
With side or auxiliary cutter |
24 |
| 37/365 |
Rotary |
14 |
| 37/462 |
Endless digger |
30 |
| 37/465 |
Digging chain, bucket, blade, or tooth structure, per se |
59 |
| 37/463 |
With endless conveyor |
7 |
| 37/464 |
Having nonbucket-type digging means |
37 |
| 37/300 |
Grave digger |
7 |
| 37/902 |
Hydraulic motors |
13 |
| 37/301 |
Land clearer |
41 |
| 37/303 |
Stone remover |
16 |
| 37/302 |
Tree or stump remover |
133 |
| 37/466 |
Miscellaneous |
78 |
| 37/905 |
Nondredge excavating by fluid contact or explosion |
18 |
| 37/182 |
Orange-peel buckets |
2 |
| 37/3 |
Peat excavators |
10 |
| 37/195 |
Processes |
175 |
| 37/104 |
Railway graders |
128 |
| 37/105 |
Side former |
39 |
| 37/106 |
Scoop |
7 |
| 37/107 |
Endless conveyor |
12 |
| 37/381 |
Road grader-type |
20 |
| 37/382 |
Condition responsive |
43 |
| 37/383 |
Including ground supported, grader guiding rail |
6 |
| 37/384 |
Adjustable digger |
2 |
| 37/385 |
Rotary digger |
0 |
| 37/393 |
Plow with inclined axis conveyor wheel |
0 |
| 37/391 |
Plow with transverse conveyor wheel |
2 |
| 37/392 |
And endless conveyor |
0 |
| 37/389 |
Plow with transverse endless conveyor |
6 |
| 37/390 |
Disc plow |
1 |
| 37/386 |
Rotary digger |
3 |
| 37/387 |
Adjustable |
6 |
| 37/388 |
Transverse endless digger |
4 |
| 37/189 |
Rotary digger |
133 |
| 37/190 |
Endless conveyor |
75 |
| 37/411 |
Scoop or excavating and transporting container |
34 |
| 37/443 |
Dipper-type (e.g., backhoe bucket) |
99 |
| 37/434 |
Manually operated (e.g., two-wheel barrow) |
19 |
| 37/435 |
Mounted rearwardly of vehicle |
7 |
| 37/436 |
Bowl operatively connected to wheel axle |
1 |
| 37/437 |
Including rear unloading |
0 |
| 37/438 |
Actuated by fluid means |
0 |
| 37/440 |
Lever and latch mechanism |
1 |
| 37/439 |
With caster wheel or shoe |
2 |
| 37/441 |
Dumping runner or revolving-type |
1 |
| 37/467 |
Handled or hand operated |
1 |
| 37/442 |
Pushed forwardly of vehicle for filling |
24 |
| 37/444 |
Scoop or bucket structure, per se |
145 |
| 37/445 |
Including door structure or operator |
19 |
| 37/412 |
Supported on vehicle between longitudinally spaced ground supports |
8 |
| 37/414 |
Condition responsive or programmable means controls the excavating operation |
103 |
| 37/415 |
Control of attitude or depth of cut |
21 |
| 37/416 |
Control of scoop component (e.g., elevator, apron, or ejector) |
29 |
| 37/424 |
With coaction between apron or elevator and bowl |
3 |
| 37/425 |
Actuated by fluid means |
5 |
| 37/426 |
With coaction between apron or elevator and ejector |
6 |
| 37/419 |
With means to aid loading or load distribution |
13 |
| 37/420 |
By auger |
10 |
| 37/421 |
By digging movement of apron |
0 |
| 37/422 |
By endless conveyor |
17 |
| 37/423 |
With particular conveyor feature including drive means |
14 |
| 37/431 |
With particular unloading feature |
25 |
| 37/432 |
Rear unloading |
2 |
| 37/433 |
Revolving-type |
0 |
| 37/429 |
With significant apron structure or manipulation |
7 |
| 37/430 |
Actuated by fluid means |
7 |
| 37/427 |
With significant bowl structure or manipulation |
6 |
| 37/428 |
Actuated by fluid means |
11 |
| 37/417 |
With specific suspension or means to steer or facilitate mounting of implement on vehicle |
37 |
| 37/418 |
With tandem or plural scoops or compartments |
3 |
| 37/413 |
With alarm, indicator, signal, or inspection means |
17 |
| 37/903 |
Scoop or scraper attachments |
171 |
| 37/304 |
Self-loading vehicle |
18 |
| 37/306 |
Elevating wheel |
1 |
| 37/305 |
Having endless digger or conveyor |
13 |
| 37/196 |
Snow or ice removing or grooming by portable device |
24 |
| 37/241 |
Combined or convertible |
45 |
| 37/242 |
Rotary excavating tool |
19 |
| 37/243 |
Lawnmower |
24 |
| 37/234 |
Including specific hydraulic control system to position implement |
104 |
| 37/285 |
Manually powered |
89 |
| 37/244 |
Motorized rotary excavating tool |
54 |
| 37/259 |
Centrifugal impeller |
26 |
| 37/248 |
Diverse multistage rotary tools or tool portions (e.g., feeding and throwing, etc.) |
28 |
| 37/249 |
Including screw-type auger for first stage |
21 |
| 37/251 |
And centrifugal impeller for final stage |
23 |
| 37/252 |
Auger and impeller on single shaft |
13 |
| 37/250 |
Augers on separate shafts |
16 |
| 37/246 |
Electric motor drive |
24 |
| 37/253 |
Fed by scraper blade |
8 |
| 37/256 |
Including centrifugal impeller |
11 |
| 37/254 |
Including screw-type auger |
16 |
| 37/255 |
Augers on separate shafts |
11 |
| 37/260 |
Having specific flow guide |
40 |
| 37/261 |
Having motor powered adjustment |
16 |
| 37/262 |
Vane within chute controls flow path |
16 |
| 37/247 |
Rotor shaft adjustable relative to direction of travel |
7 |
| 37/257 |
Screw-type auger |
31 |
| 37/258 |
Having plural vane segments |
12 |
| 37/245 |
Tool arresting means responsive to sensed condition |
19 |
| 37/197 |
Process |
42 |
| 37/198 |
Railway clearer |
2 |
| 37/201 |
Explosive |
2 |
| 37/202 |
Fluid current conveyor |
5 |
| 37/203 |
For clearing single rail of set |
0 |
| 37/204 |
Electrified rail |
1 |
| 37/207 |
Including means clearing side of, or groove in, rail |
3 |
| 37/205 |
Including rotary excavating tool |
0 |
| 37/206 |
And scraper blade |
0 |
| 37/209 |
Having rotary excavating tool |
1 |
| 37/210 |
Plural rotary tools |
1 |
| 37/212 |
And v-shaped scraper blade |
1 |
| 37/211 |
Diverse tools performing different stages of operation |
1 |
| 37/213 |
Screw-type auger |
3 |
| 37/214 |
Having scraper blade |
4 |
| 37/218 |
Diagonal |
2 |
| 37/215 |
Inclined plane with v-divider |
0 |
| 37/216 |
Having auxiliary blade or shiftable divider |
3 |
| 37/217 |
V-shaped |
6 |
| 37/208 |
With endless conveyor |
2 |
| 37/199 |
With melter |
6 |
| 37/200 |
Heated plow |
3 |
| 37/264 |
Scoop |
14 |
| 37/265 |
Manually powered |
45 |
| 37/266 |
Scraper blade |
118 |
| 37/279 |
Diagonally oriented |
30 |
| 37/283 |
Adjustable about central vertical hinge |
40 |
| 37/281 |
And auxiliary wing or extension |
69 |
| 37/280 |
Including side gate discharge preventer |
19 |
| 37/284 |
Manually powered |
24 |
| 37/282 |
Supported on inclined plane |
1 |
| 37/267 |
Invertible |
11 |
| 37/270 |
Mounted on surface contacting support or guide |
68 |
| 37/271 |
For adjusting height of blade |
30 |
| 37/268 |
Pulled (e.g., by horse or vehicle) |
42 |
| 37/269 |
V-shaped |
8 |
| 37/272 |
V-shaped |
15 |
| 37/273 |
Adjustable or collapsible apex |
20 |
| 37/274 |
And auxiliary wing or extension |
27 |
| 37/275 |
Top flap |
4 |
| 37/276 |
Diverging forwardly |
7 |
| 37/278 |
Manually powered |
9 |
| 37/277 |
Supported on inclined plane |
1 |
| 37/219 |
Snow or ice surface groomer |
61 |
| 37/221 |
Having diverse tools |
16 |
| 37/222 |
Including rotary tool |
36 |
| 37/223 |
Having rotary tool |
24 |
| 37/224 |
Compacting roller |
13 |
| 37/220 |
Including rut cutter |
12 |
| 37/263 |
Tool prepares wheel path for passage of wheel |
7 |
| 37/235 |
Vehicle mount including power lift |
48 |
| 37/236 |
Power means is hydraulically actuated piston |
99 |
| 37/232 |
Vehicle mount with obstacle responsive trip, or yieldable tool (e.g., brush) |
110 |
| 37/233 |
Resilient impeller or blade |
63 |
| 37/225 |
With compressor die |
3 |
| 37/226 |
And heater |
3 |
| 37/237 |
With endless conveyor |
12 |
| 37/238 |
And rotary excavating tool |
10 |
| 37/240 |
Carrying excavating tool |
7 |
| 37/239 |
Multistage conveyors |
2 |
| 37/227 |
With melter |
40 |
| 37/228 |
Having heated transport chamber |
26 |
| 37/229 |
Electric or solar heat source |
4 |
| 37/230 |
Manually powered |
13 |
| 37/231 |
With specific means to facilitate connection to, or disconnection from, vehicle |
209 |
| 37/904 |
Vibration means for excavating tool |
83 |
| 37/906 |
Visual aids and indicators for excavating tool |
18 |
