Door and gate spring

Details Door and gate spring Door and gate spring

1982-08-09

1988-03-22

Silverberg, Fred

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Closers

Spring

16 76, 16286, 16300, 16DIG10, 267179, E05F 112

Patent

active

047319020

ABSTRACT:
A coil spring has elliptical openings in the end turns for non-rotatably receiving elliptically shaped studs which are press-fitted into the spring, the ends being respectively attached to a pair of mounting brackets.

REFERENCES:
patent: 135192 (1873-01-01), Espey
patent: 136482 (1873-03-01), Bean et al.
patent: 137770 (1873-04-01), Foster
patent: 224377 (1880-02-01), Barker
patent: 242429 (1881-06-01), Butler
patent: 243088 (1881-06-01), Taylor et al.
patent: 244184 (1881-07-01), Clark
patent: 406025 (1889-07-01), Calahan
patent: 532787 (1895-01-01), Keene
patent: 646223 (1900-03-01), Keil et al.
patent: 698744 (1902-04-01), Schwartz
patent: 1249111 (1917-12-01), Katzenberger
patent: 1302477 (1919-04-01), Smith
patent: 1695454 (1928-12-01), Coyne

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