Ventilation – Mine – With partition means
Reexamination Certificate
2006-10-10
2006-10-10
Thompson, II, Hugh B. (Department: 3634)
Ventilation
Mine
With partition means
C454S168000, C049S138000, C016S049000, C016S066000
Reexamination Certificate
active
07118472
ABSTRACT:
A mine door installation has a frame installed in a mine passageway. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. A pneumatically-powered control system may be provided to control the door installation. The pneumatic control system may comprise a calibrated vent to shorten the delay in the response of the door leaf to direction from the control system to stop moving. The pneumatic control system may also comprise a limit valve to prevent the door installation from opening when a second door installation is open, thereby preventing both door installations in an air lock from being open at the same time.
REFERENCES:
patent: 1716707 (1929-06-01), Schoelkopf
patent: 2550349 (1951-04-01), Helz
patent: 2564067 (1951-08-01), Karp
patent: 2618365 (1952-11-01), Seagren
patent: 2748855 (1956-06-01), Seims et al.
patent: 2891514 (1959-06-01), Moeller
patent: 2918890 (1959-12-01), Gail
patent: 2926012 (1960-02-01), Maher
patent: 3125232 (1964-03-01), Brinkman et al.
patent: 3883014 (1975-05-01), Glomski et al.
patent: 3894477 (1975-07-01), Tomikawa
patent: 3921335 (1975-11-01), Hewitt et al.
patent: 3936977 (1976-02-01), Runft et al.
patent: 3940877 (1976-03-01), Slaybaugh
patent: 4094158 (1978-06-01), LeVere et al.
patent: 4510714 (1985-04-01), Kasper et al.
patent: 4765346 (1988-08-01), Simin
patent: 4911577 (1990-03-01), Kennedy et al.
patent: 4915540 (1990-04-01), Kennedy et al.
patent: 4967444 (1990-11-01), Korling et al.
patent: RE34053 (1992-09-01), Kennedy et al.
patent: 5168667 (1992-12-01), Kennedy et al.
patent: RE34220 (1993-04-01), Kennedy et al.
patent: 5222838 (1993-06-01), Kennedy et al.
patent: 5240349 (1993-08-01), Kennedy et al.
patent: 5412916 (1995-05-01), Kennedy et al.
patent: 5466187 (1995-11-01), Kennedy et al.
patent: 5515649 (1996-05-01), Strab
patent: 5651162 (1997-07-01), Keszthelyi
patent: 5771635 (1998-06-01), Skinner
patent: 5795367 (1998-08-01), Kennedy et al.
patent: 5812741 (1998-09-01), Kennedy et al.
patent: 6032986 (2000-03-01), Kennedy et al.
patent: RE36853 (2000-09-01), Kennedy et al.
patent: 6164871 (2000-12-01), Kennedy et al.
patent: 6220785 (2001-04-01), Kennedy et al.
patent: 6256946 (2001-07-01), Kennedy et al.
patent: 6264549 (2001-07-01), Kennedy et al.
patent: 6279315 (2001-08-01), Harju
patent: 6379084 (2002-04-01), Kennedy et al.
patent: 6386147 (2002-05-01), Fransen
patent: 6394707 (2002-05-01), Kennedy et al.
patent: 6419324 (2002-07-01), Kennedy et al.
patent: 6425820 (2002-07-01), Kennedy et al.
patent: 6457906 (2002-10-01), Kennedy et al.
patent: 6594954 (2003-07-01), Kennedy et al.
patent: 6938372 (2005-09-01), Kennedy et al.
patent: 2003/0079423 (2003-05-01), Kennedy et al.
Jack Kennedy Metal Products & Buildings, Inc., Kennedy Power Machine Doors brochure, Jul. 2, 2002.
Jack Kennedy Metal Products & Buildings, Inc., Form Transmittal Letter for Kennedy Power Machine Doors, Jul. 2, 2002.
The American Mine Door Company, Canton Doors. . . for Trucks. . . for Motors. . . Speed up haulage brochure, admitted prior art.
Kennedy John Matthew
Kennedy William R.
Senniger Powers
Thompson II Hugh B.
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