US Patent Class 193
CONVEYORS, CHUTES, SKIDS, GUIDES, AND WAYS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  MISCELLANEOUS
2 R  DF  CHUTES
3  DF  .~ Loading or trimming
4  DF  .~ Unloading
5  DF  .~.~ Vehicle wall supported
6  DF  .~.~ Extensible trough
7  DF  .~ Fruit
8  DF  .~ Mail
9  DF  .~ Grain drill
10  DF  .~ For rotary drum
11  DF  .~ With sprayer
12  DF  .~ Spiral
13  DF  .~.~ Switch
14  DF  .~ Sectional, multiple-point discharge
15  DF  .~ Vertically adjustable, bodily
16  DF  .~ Horizontal and vertical swing
17  DF  .~ Vertical swing
18  DF  .~.~ Counterweight
19  DF  .~.~.~ Varied
20  DF  .~.~.~ Valved
21  DF  .~.~ Valved
*  DD  .~ Horizontal swing
22  DF  .~.~ Swiveled sections
23  DF  .~.~ Multiple-point discharge
24  DF  .~ Counterweight
25 R  DF  .~ Flexible wall
25 A  DF  .~.~ Open-face chutes
25 E  DF  .~.~ Individual elements
25 AC  DF  .~.~ Ammunition chutes
25 S  DF  .~.~ Resilient conduit or spring construction
25 FT  DF  .~.~ Feed tracks
25 B  DF  .~.~ Balloon or inflatable members
25 C  DF  .~.~ Extensible, flexible chutes
27  DF  .~ Zigzag
28  DF  .~.~ Switch
*  DD  .~ Vertical pipe
29  DF  .~.~ Multiple-point discharge
30  DF  .~.~ Telescopic
31 R  DF  .~ Switch
31 A  DF  .~.~ Chute switches
32  DF  .~ Retarder
33  DF  .~ Wall
34  DF  .~.~ Vertical
2 A  DF  .~ Chute connections
2 B  DF  .~ Wall vibrators
2 C  DF  .~ Variable capacity troughs
2 D  DF  .~ Endless gravity
2 E  DF  .~ Cup
35 R  DF  ROLLERWAYS
36  DF  .~ Switch
37  DF  .~ Rollers
35 A  DF  .~ Abutments and brakes for roller conveyers
35 SS  DF  .~ Submerging and rising
35 C  DF  .~ Centering and clamps (guides, generally)
35 TE  DF  .~ Telescoping and extending
35 F  DF  .~ Flexible
35 MD  DF  .~ Multidirectional
35 J  DF  .~ Joints
35 G  DF  .~ Gates
35 B  DF  .~ Biased rollers
35 S  DF  .~ Spiral
38  DF  SKIDWAYS
39  DF  .~ Switch
40  DF  .~ Retarder
41  DF  SKIDS
42  DF  ROLLER JACKS
44  DF  ORIENTER
45  DF  .~ Manual or mechanical means moves article to upset
46  DF  .~ Grooved or twisted chute
47  DF  .~ Article upset about fixed point
48  DF  .~ Article upset about movable point
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DIGESTS
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DIG 1  DD  Coin chute
DIG 2  DD  Indicators, safety devices and signals