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Class Information
Number: 291
Name: Track sanders >
Description: Means for applying sand or like material to vehicle-wheel treads or to vehicle-tracks, such as automobile-roads or railway-rails, or to both the wheel-treads and tracks, for the purpose of increasing the tractive effect between such wheels and roads or rails.










Class Number Class Name No. of Patents
291/17

Alarms

0
291/14

Brake-handle control

0
291/15

Brake-system control

3
291/3

Fluid delivery

33
291/13

Air ports and screens

0
291/12

Blast-nozzle cleaners

1
291/7

Gravity conversion

0
291/8

Bypass

0
291/9

Horizontal trap axis

0
291/10

Vertical trap axis

0
291/11.1

Including sand trap

1
291/11.2

Multiple fluid inlets for delivery pipe

1
291/11.3

Specified means to alter inlet fluid flow

1
291/6

Movable trap valve

1
291/5

Reversing

0
291/4

Smoke and cinder

0
291/16

Hand-valve control

1
291/19

Heaters

2
291/20

Electric

3
291/21

Steam

0
291/18

Jet in hopper

0
291/1

Miscellaneous

15
291/22

Power-actuated

0
291/23

Electric

7
291/24

Fluid

2
291/25

Sand feeders

12
291/27

Chain

2
291/34

Longitudinal slide

2
291/28

Oscillatory

2
291/29

Cup

1
291/30

Hopper

0
291/31

Spout cutoff

0
291/35

Pivoted slide

2
291/26

Reversing

0
291/32

Rotary

2
291/33

Screw

2
291/36

Vertical plunger

2
291/37

Helical guide

0
291/38

Sand hoppers

17
291/40

Dome

0
291/39

Wheel guard

3
291/48

Sand screens

1
291/41

Sand-delivery pipe

5
291/42

Cleaners

1
291/43

Fluid

1
291/44

Flexible

0
291/46

Nozzles

10
291/47

Pivoted

3
291/45

Telescopic

0
291/2

Wheel-slip control

21
 
 
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