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US3117827A
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Thrust bearing
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US3115665A
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Door-operating arm for center-hung doors
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US3101507A
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Door operating arm and rail
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FR1291836A
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Door closing mechanism
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GB886924A
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Door checking and closing mechanism
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US2998635A
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Method of making roller bearings
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US2945255A
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Adjustable hold-open guide rail for automatic door closer
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US3040372A
|
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Door closer mechanism
|
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US2992808A
|
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Metering valve
|
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US2887194A
|
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Hold-open means for automatic door closing apparatus
|
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US2955314A
|
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Pivot pin adjusting means for center-hung doors
|
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US2866224A
|
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Door closer centering stop
|
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US2703906A
|
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Hold-open door check
|
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US2744779A
|
|
Door holder
|
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US2550756A
|
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Door closer
|
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US2501505A
|
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Door spindle key lock
|
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US2158417A
|
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Closing and checking unit
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US2045076A
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Door check and closer
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US1921314A
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Door closer and check
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US1901355A
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Self aligning interfitting spindle and socket element
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