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US 4,003,102 AGranted
Door and window closer
AssigneeElmer E. Jones
InventorsNathaniel L. Hawks, John R. Shively
Life of this patent
Estimating the term…
Abstract
A spring or gravity motor having an override mechanism for a movable window or door including a pneumatic cylinder, a piston, a check valve admitting air to the cylinder, an override valve permitting pressure dumping of the air in the cylinder during movement of the door or window at a speed greater than the normal closing speed by the motor.
Claims6
A closer apparatus for a movable panel having a first closed position covering a portion of a framed opening and a second open position uncovering a portion of said opening comprising:
- a. motor means connected to said frame and movable panel and biasing said movable panel to said first closed position;
- and said motor means includes a weight mounted for substantially vertical reciprocating travel and connected to said piston for travel therewith;
- b. a pneumatic cylinder forming a compression chamber;
- c. a piston formed with a passage therethrough and mounted for slidable movement within said cylinder and operatively connected to said movable panel for compressing air within said chamber;
- d. check valve means permitting the inlet of air to said compression chamber of said cylinder upon movement of said panel from said first closed position to said second open position and blocking passage of air upon movement of said panel to said closed first position;
- e. air restriction means regulating the escape of compressed fluid from said chamber;
- f. an override valve means mounted on said piston having a first position out of sealing contact with said fluid passage through said piston permitting flow of fluid therethrough from said chamber when said panel is forced to close at a rate faster than the normal closing of said panel by said motor means and a second position in substantial sealing engagement with said fluid passage in said piston and said override valve means includes a valve plate having a valve seat at one end formed for sealably mating with a valve seat on said piston;
- g. means biasing said override valve means to said first open position;
- h. force means normally overcoming said biasing means during movement of said panel from said second to said first position thereby forcing said override valve means to said second position in substantial sealing engagement with said piston passage;
- i. said valve plate is formed with openings which are in communication with said compression chamber and said passage through said piston in said first position of said override valve means and out of communication with said passage through said piston in said second position of said override valve means;
- and
- j. said motor means includes a connection cable operably connected at one end to said frame and has a connection member on the other end operably connected to said piston.
9 more elements
A closer apparatus for a movable panel having a first closed position covering a portion of a framed opening and a second open position uncovering a portion of said opening comprising:
- a. motor means connected to said frame and movable panel and biasing said movable panel to said first closed position;
- b. a pneumatic cylinder forming a compression chamber;
- c. a piston formed with a passage therethrough and mounted for slidable movement within said cylinder and operatively connected to said movable panel for compressing air within said chamber;
- d. check valve means permitting the inlet of air to said compression chamber of said cylinder upon movement of said panel from said first closed position to said second open position and blocking passage of air upon movement of said panel to said closed first position;
- e. air restriction means regulating the escape of compressed fluid from said chamber;
- f. an override valve means mounted on said piston having a first position out of sealing contact with said fluid passage through said piston permitting flow of fluid therethrough from said chamber when said panel is forced to close at a rate faster than the normal closing of said panel by said motor means and a second position in substantial sealing engagement with said fluid passage in said piston;
- g. means biasing said override valve means to said first open position;
- h. force means normally overcoming said biasing means during movement of said panel from said second to said first position thereby forcing said override valve means to said second position in substantial sealing engagement with said piston passage;
- i. said motor means includes a spring mounted in said cylinder connected at one end to said cylinder and at its other end to said piston;
- j. said check valve means includes an annular piston cup seal mounted on said piston;
- and
- k. said override valve means includes a shaft and a valve head connected to one end of a movable pulley and said valve head is movable into sealing engagement with said passage through said piston and said shaft has a cross section less than said valve passage through which said shaft is inserted.
9 more elements
Dependencies are inferred from the claim text.