Calvin Michael Rushford, Age 61Reed City, MI
Calvin Rushford Phones & Addresses
Reed City, MI
Evart, MI
Auburn, AL
Tuskegee, AL
14280 N Cottonwood Ave, Reed City, MI 49677
Work
Position:
Craftsman/Blue Collar
Education
Degree:
High school graduate or higher
Emails
Mentions for Calvin Michael Rushford
Publications & IP owners
Us Patents
Revolving Door Collapsing Mechanism
US Patent:
4640046, Feb 3, 1987
Filed:
Jun 18, 1985
Appl. No.:
6/746236
Inventors:
Calvin R. Rushford - Reed City MI
Assignee:
Indal, Inc. - Reed City MI
International Classification:
E05D 1502
US Classification:
49 44
Abstract:
A collapsible revolving door in which a plurality of leaves (32, 34, 36) are mounted to an upper cam housing (52) and a lower cam housing (56) for rotation about a central axis. Each of the leaves is mounted to a cam (80) through a pivot shaft (60) for rotation about a central axis of the cam (80) and the pivot axis (60). Each cam (80) has substantially opposed engaging sockets (84, 86) and substantially opposed collapsing sockets (88, 90). Dentent mechanisms (92) have semispherical cam followers (96) which are positioned in the engaging sockets (84, 86) when the leaves are radially oriented about the central axis. Under panic conditions, the door leaves (32, 34, 36) rotate about the pivot shafts (60) against the retaining force of the detent mechanism (92), whereby the detent mechanisms will register with the collapsing sockets (88, 90). Adjustment blocks (98) are adjustable mounted in the housing (52, 54) to simultaneously adjust the bias on two adjacent detent mechanism springs (94).
Collapsible Revolving Door
US Patent:
4688350, Aug 25, 1987
Filed:
Jul 29, 1986
Appl. No.:
6/892142
Inventors:
Marwan E. Hattem - Monroe MI
Calvin R. Rushford - Reed City MI
Calvin R. Rushford - Reed City MI
Assignee:
Tubelite Division of Indall, Inc. - Reed City MI
International Classification:
E05D 1502
US Classification:
49 44
Abstract:
A revolving door (10) adapted to be mounted in a doorway to provide access and egress. The door (10) revolves about a vertical axis and has an upper cam housing (20) and a lower cam housing (22). Radial slots (24) extend through cam housings (20, 22). Pins (26) engage slots (24) and secure doorwings (12) to upper and lower cam housings (20, 22). A mechanism is mounted within at least one of cam housings (20, 22) for permitting doorwings (12) to be collapsed in panic situations or to accommodate large objects. At least one of the upper and lower cam housings has lateral bores (34) extending therethrough and intersecting the radial slots (24) at right angles. The mechanism for permitting the cam housings to be collapsed includes a cam mounted on each pin securing the doorwing to the cam housing and a spring-biased detent mechanism mounted within the lateral bore. This arrangement of the spring-biased detent mechanism within the lateral bore permits easy access to the detent mechanism for adjusting the pressure or force at which the doorwings collapse without the necessity of disassembling the revolving door.
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