REMOVABLE DOOR STRUCTURE

• US 3,677,259 A
• Filed: 11/04/1970
• Issued: 07/18/1972
• Est. Priority Date: 11/04/1970
• Status: Expired due to Term

• Current Assignee: John T. Doner
• Original Assignee: John T. Doner
• Inventors: Doner, John T.
• Primary Examiner(s): Dority, Jr., Carroll B.
• Application Number:
  US05/086,730
• Time in Patent Office: 622 Days
• Field of Search: 126/194 16/149
• US Class Current: 126/194
• CPC Class Codes: E05Y 2201/416 for counterbalancing
• CPC Class Codes: E05Y 2201/488 Traction springs
• CPC Class Codes: E05Y 2900/308 for ovens
• CPC Class Codes: F24C 15/023 Mounting of doors, e.g. hinges, counterbalancing

Abstract

A door such as an oven door structure in which an enclosure such as the oven has an access opening with a door for closing the opening mounted for rotation about an axis between closed and open positions with the door being easily removable when desired by moving it to a position between open and closed and moving the door by pushing the door downward against a yieldable urging means in a direction to move a pin of each of two pairs of pins into alignment with a side opening in a slot, moving these pins through the opening followed by moving a second pair of pins out of their openings with the result that the door is completely removed from the enclosure. In the preferred construction a pivotally mounted link arm on each side of the door is movable about an axis spaced from the door axis so that the link arms and the door pivot at different rates and with a cavity in each arm that coincides with a pin removal slot only when the door is in its intermediate removable position so that the door can only be removed in the above manner in this intermediate position. An automatic safety catch is provided so that when the door is removed the hinge mechanism is prevented from closing against the enclosure prior to reinstallation of the door on the hinge mechanism.

Claims

1. A door structure, comprising:

means forming an enclosure having an access opening;

a door for closing said opening movable about an axis between closed and open positions and having a pair of spaced recesses;

a pair of side hinge members mounted on said enclosure;

a pair of structural members each hingedly connected to a said hinge member;

pairs of spaced pins on said door extending into each of said recesses;

means on each said structural member providing a pair of spaced elongated slots, a first slot of each pair having an end opening and the second slot of each pair having a side opening and a closed end, the pins of each pair of pins being locatable in each pair of slots when the door is mounted on said structural members;

yielding means urging the door in a direction to press a pin of each pair into a said second slot closed end and away from the corresPonding side opening, the door when in an intermediate removal position between fully open and fully closed positions being thereby displaceable relative to said structural members against the urging of said yieldable means for aligning a second slot pin of each said pair with a side opening for movement therethrough followed by removal of the first slot pins through said first slot end openings in removing the door from the structural members and thus from said enclosure;

a pair of link arms;

means pivotally mounting each arm for pivotal movement with said door about an axis spaced from said door axis; and

means providing a cavity in each arm coinciding with a first slot of each said pair of slots only when the door is in said intermediate removal position to permit said removing displacing of the door.

2. A door structure, comprising:

means forming an enclosure having an access opening;

a door for closing said opening movable about an axis between closed and open positions and having a pair of spaced recesses;

a pair of said hinge members mounted on said enclosure;

a pair of structural members each hingedly connected to a said hinge member;

pairs of spaced pins on said door extending into each of said recesses;

means on each said structural member providing a pair of spaced elongated slots, a first slot of each pair having an end opening and the second slot of each pair having a side opening and a closed end, the pins of each pair of pins being locatable in each pair of slots when the door is mounted on said structural members; and

yielding means urging the door in a direction away from said axis to press a pin of each pair into a said second slot closed end and away from the corresponding side opening, the door when in an intermediate removal position between fully open and fully closed positions being thereby displaceable relative to said structural members by pushing downwardly on the door against the urging of said yieldable means for aligning a second slot pin of each said pair with a side opening for movement therethrough followed by removal of the first slot pins through said first slot end openings in removing the door from the structural members and thus from said enclosure.

3. The structure of claim 1 wherein each said cavity is bounded by a pair of side shoulders, one of which underlies a first slot pin to block said door displacing at all position of said door except said intermediate removal position.

4. The structure of claim 1 wherein there are provided a stop portion on each link arm, and a stop member against which each said stop portion bears when said door is in said intermediate position to retain said door in said intermediate position.

5. The structure of claim 4 wherein spring means are provided yieldably holding said link arms against said stop members.

6. The structure of claim 5 wherein said spring means are connected between said link arms and said enclosure for urging said door toward closed position simultaneously with the holding of said arms against said stop members.

7. The structure of claim 1 wherein each said link arm is pivotally connected to a structural member adjacent a said first slot.

8. The structure of claim 5 wherein each said hinge member has mounted thereon a said link arm and a said spring means thereby to provide a subassembly comprising a structural member, a hinge member, a link arm and a spring means installable on and removable from said enclosure as a mechanical unit.

9. The structure of claim 7 wherein said link arm is pivotally connected to a connecting arm which is pivotally mounted on said hinge member.

10. The structure of claim 9 wherein each said spring means is connected between a said connecting arm and a said hinge member.

11. A door structure, comprising:

means forming an enclosure having an excess opening;

a door for closing said opening movable about an axis between closed and open positions and having a pair of spaced recesses;

a pair of side hinge members mounted on said enclosure;

A pair of structural members each hingedly connected to a said hinge member;

pairs of spaced pins on said door extending into each of said recesses;

means on each said structural member providing a pair of spaced elongated slots, a first slot of each pair having an end opening and the second slot of each pair having a side opening and a closed end, the pins of each pair of pins being locatable in each pair of slots when the door is mounted on said structural members;

yielding means urging the door in a direction to press a pin of each pair into a said second slot closed end and away from the corresponding side opening, the door when in an intermediate removal position between fully open and fully closed positions being thereby displaceable relative to said structural members against the urging of said yieldable means for aligning a second slot pin of each said pair with a side opening for movement therethrough followed by removal of the first slot pins through said first slot end openings in removing the door from the structural members and thus from said enclosure; and

catch means for maintaining said side hinge members and said structural members in said intermediate removal position while the door is removed, said structural members having apertures therein to movably receive said catch means for limited movement thereof along the axis of said structural members and each of said catch means being provided with a recess to receive said second slot pin for support of said catch means, said apertures being above said second slots, whereby on removal of the door causing said second slot pin to move away from said hinge mechanism, said catch means under the influence of gravity will automatically move down in front of at least a portion of said side hinge members in interference relation therewith preventing said structural members from moving into fully closed position.