US Patent Class 278
LAND VEHICLES: ANIMAL DRAFT APPLIANCES




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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  MISCELLANEOUS
2  DF  LOAD STARTERS
2.1  DF  STREET CAR
*  DD  DRAFT EQUALIZERS
3  DF  .~ Horse longitudinally aligned
4  DF  .~.~ Two abreast
5  DF  .~ Horses abreast
6  DF  .~.~ Five-horse type
7  DF  .~.~.~ With pole or poles
8  DF  .~.~ Four-horse type
9  DF  .~.~.~ With pole or poles
10  DF  .~.~.~.~ Offset pole
11  DF  .~.~.~.~.~ Three-against-one pull
12  DF  .~.~.~.~.~ Two-against-two pull
13  DF  .~.~.~.~.~.~ Lateral evener connection
14  DF  .~.~ Three-horse type
15  DF  .~.~.~ With pole or poles
16  DF  .~.~.~.~ With intermediate evener
17  DF  .~.~.~.~.~ Offset
18  DF  .~ Two-horse type
19  DF  .~.~ Leverage adjustment
20  DF  .~.~.~ Automatic
21  DF  HORSE DETACHERS
22  DF  .~ Automatic
23  DF  .~ Combined brake
24  DF  .~ Traces from singletree
25  DF  .~.~ Traces positively moved
26  DF  .~.~ Movable trace-eye-engaging element
27  DF  .~.~.~ Pivoted
28  DF  .~.~.~ Sliding pin or rod
29  DF  .~ Thills or poles from vehicle
30  DF  .~.~ Retracting axle-clip bolts
31  DF  .~ Doubletree from pole
32  DF  .~ Singletree from thill or evener
33  DF  POLES AND THILLS
34  DF  .~ Plural
35  DF  .~ Special-purpose attachments
36  DF  .~ Poles
37  DF  .~.~ Agricultural-implement type
38  DF  .~.~ The pole body
39  DF  .~.~ Selective positioned
40  DF  .~.~ Slip tongue
41  DF  .~.~ Axle attached
42  DF  .~.~.~ Width adjustment
43  DF  .~.~ Axle hounds attached
44  DF  .~ Thills
45  DF  .~.~ Two-wheeled vehicles
46  DF  .~.~ Offset draft
47  DF  .~.~.~ Selective direct
48  DF  .~.~ Sectional
49  DF  .~.~ Joints and braces
50  DF  .~ Tips
51  DF  .~.~ Safety neck-yoke retainers
52  DF  THILL COUPLINGS
53  DF  .~ Resilient
54  DF  .~ Safety attachments
55  DF  .~ Plural
56  DF  .~ Special-position release
57  DF  .~.~ L-head type
58  DF  .~.~ T-head type
59  DF  .~.~ D-head type
60  DF  .~ Removable transverse pin or bolt
61  DF  .~.~ Antirattling
62  DF  .~.~.~ With special pin retainers
63  DF  .~.~.~ Resilient
64  DF  .~.~.~.~ Adjustable
65  DF  .~.~ Special pin retainers
66  DF  .~ Opposed lug engaging or carrying jaws
67  DF  .~ L-head type
68  DF  .~ T-head type
69  DF  .~.~ Cooperating hooks
70  DF  .~.~.~ Retainers
71  DF  .~.~.~.~ Spring
72  DF  .~ D-head type
73  DF  .~.~ Cooperating hook
74  DF  .~.~.~ Retainers
75  DF  .~.~.~.~ Pivoted
76  DF  .~.~.~.~ Spring
77  DF  .~.~ Plural-part eye
78  DF  .~.~.~ Pivoted jaws
79  DF  .~.~.~.~ Grapple type
80  DF  .~ Ball and socket
81  DF  THILL-SUPPORTS
82  DF  .~ Plural position
83  DF  .~ Spring latches
84  DF  .~ Spring
85  DF  .~ Separate props
86  DF  POLE SUPPORTS
87  DF  .~ Ground-engaging props
88  DF  .~ Spring
89  DF  .~.~ Coil
90  DF  WHIFFLETREES
91  DF  .~ Resilient
92  DF  .~ Metallic
93  DF  .~.~ Trussed
94  DF  .~ Trussed
95  DF  .~ Connections
96  DF  .~.~ Link or clevis
96.1  DF  .~.~.~ Resilient
96.2  DF  .~.~.~ Adjustable draft line
96.3  DF  .~.~.~.~ Horizontally
97  DF  .~.~ Resilient
98  DF  .~.~.~ To pole or thills
99  DF  .~.~ To pole or thills
100  DF  .~.~.~ Pivot bolt
101  DF  .~.~.~.~ Offset pivot
102  DF  .~ Trace and whiffletree connections
103  DF  .~.~ Resilient
104  DF  .~.~ Clamp
105  DF  .~.~ Trace-eye-engaging head or end
106  DF  .~.~.~ Loop retainers
107  DF  .~.~.~ Hook retainers
108  DF  .~.~.~ Spring-detent retainers
109  DF  .~.~.~ Pivoted button or lug retainers
110  DF  .~.~.~ Rotatable-button retainers
111  DF  .~.~ Hooks
112  DF  .~.~.~ Trace retaining
113  DF  .~.~.~.~ Movable keeper
114  DF  .~.~.~.~.~ Snap-hook type
115  DF  .~.~.~.~ Special-position release
116  DF  .~.~.~.~.~ Opposed lapping hooks
117  DF  .~.~.~ Whiffletree fastenings
118  DF  TRACE AND THILL OR POLE CONNECTIONS
119  DF  NECK YOKES
120  DF  .~ End construction
121  DF  .~ Pole couplings
122  DF  .~.~ Modified pole and yoke (center)
123  DF  .~.~.~ Permanently attached
124  DF  .~.~ With safety devices
125  DF  .~.~ Leather eye or ring
126  DF  HOLDBACKS
127  DF  .~ Harness attached
128  DF  .~.~ Breech strap
129  DF  .~.~.~ Adjustable
130  DF  .~.~.~ Automatic release