Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Sash balances – Spring
Patent
1993-05-03
1995-05-30
Larson, Lowell A.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Sash balances
Spring
160191, E05D 1300, E05F 1154
Patent
active
054190100
ABSTRACT:
A counterbalancing mechanism (10) for a door (D) movable between a dosed position proximate a door frame (12) and an open position displaced therefrom including a pair of drums (100, 100) for reeving lengths of cable (C) thereabout which are affixed to the door (D), shafts (70) for freely rotatably mounting the drums thereon, a pair of brackets (60, 60) mounted in spaced relation on the door frame, one of the brackets supporting each of the pair of shafts, a drive tube (30) extending between the pair of drums and being non-rotatably affixed thereto, a coil spring (80) positioned interiorly of the drive tube, said coil spring having one end (82) thereof non-rotatably affixed to the drive tube and the other end (81) non-rotatably affixed to the shaft, and a tension adjusting mechanism (110) for normally restraining the shafts and for effecting rotation of the shafts to selectively adjust the torsional forces in the coil spring.
REFERENCES:
patent: 965940 (1910-08-01), Ritter
patent: 1058824 (1913-04-01), Whitmore
patent: 1154432 (1915-09-01), Rawlings et al.
patent: 1342751 (1920-06-01), McCloud
patent: 1378123 (1921-05-01), Lovejoy
patent: 1454125 (1923-05-01), McHarg
patent: 1465695 (1923-08-01), Stewart
patent: 1470977 (1923-10-01), Heintz
patent: 1508886 (1924-09-01), Dautrick et al.
patent: 1530762 (1925-03-01), Dautrick
patent: 1621669 (1927-03-01), Johnson
patent: 1724995 (1929-08-01), Dautrick
patent: 1750042 (1930-03-01), Hoover
patent: 1827433 (1931-10-01), Kendall
patent: 1886490 (1932-11-01), Lynch
patent: 1938978 (1933-12-01), Rush
patent: 1940485 (1933-12-01), Beeman et al.
patent: 1941574 (1934-01-01), Nichols
patent: 1946970 (1934-02-01), Grandgent
patent: 1992006 (1935-02-01), Greegor
patent: 1994142 (1935-03-01), Madsen
patent: 2010214 (1935-08-01), Braun
patent: 2017012 (1935-10-01), Morgan
patent: 2020831 (1935-11-01), Greegor
patent: 2023909 (1935-12-01), Wread
patent: 2037085 (1936-04-01), Naylor
patent: 2059833 (1936-11-01), Winn, Jr.
patent: 2093019 (1937-09-01), Norberg
patent: 2099191 (1937-11-01), Blodgett
patent: 2166746 (1939-07-01), Bartel
patent: 2183495 (1939-12-01), Laufersweiler
patent: 2226017 (1940-12-01), Pixley
patent: 2257484 (1941-09-01), Rowe
patent: 2294360 (1942-09-01), Blodgett
patent: 2314015 (1943-03-01), Parsons
patent: 2605100 (1952-07-01), Matchett
patent: 2630597 (1953-03-01), Robinson
patent: 2749570 (1956-06-01), Alder
patent: 2786231 (1957-03-01), Robinson
patent: 2855162 (1958-10-01), Schacht, Jr.
patent: 3096815 (1963-07-01), May
patent: 3160200 (1964-12-01), McKee et al.
patent: 3165143 (1965-01-01), Jackwig
patent: 3412423 (1968-11-01), Binns
patent: 3413680 (1968-12-01), Rowe et al.
patent: 3616575 (1971-11-01), Harris
patent: 3635277 (1972-01-01), Bahnsen
patent: 3842892 (1974-10-01), Stieler
patent: 3921761 (1975-11-01), Votroubek et al.
patent: 3934635 (1976-01-01), Kin
patent: 4001969 (1977-01-01), Hoobery
patent: 4047441 (1977-09-01), Kellogg
patent: 4472910 (1984-09-01), Iha
patent: 4731905 (1988-03-01), Milano et al.
patent: 4757853 (1988-07-01), Price
patent: 4817927 (1989-04-01), Martin
patent: 4852378 (1989-08-01), Greco
patent: 4882806 (1989-11-01), Davis
patent: 4885872 (1989-12-01), Chang et al.
patent: 4930182 (1990-06-01), Eichenberger
patent: 4981165 (1991-01-01), Miller et al.
patent: 5010688 (1991-04-01), Dombrowski et al.
patent: 5036899 (1991-08-01), Mullet
patent: 5103890 (1992-04-01), Cloutier
Gurley Donald M.
Larson Lowell A.
Wayne-Dalton Corp.
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