| 摘要 |
1503786 Door pivots ACME GENERAL CORP 24 Oct. 1975 [8 Nov 1974] 43713/75 Heading E2F A lower door pivot comprises a support 17 secured to the door surround and a pivot assembly comprising two cooperating screw threaded parts one of which 31 engages the door and the other being a pin 37 with an enlarged head 38 which is held against rotation relative to the support; the assembly being non-rotatably engagable with the support in a number of horizontally spaced positions by means of gear means on the head of the pin engaging a rack means on the support and being held in engagement by the weight of the door. In the embodiment shown a threaded plastics sleeve 31 ribbed at 32 is driven into a hole in the door and is screw threaded to pivotably receive a threaded pin 37 having a conical splined head 38. The head 38 engages in a slot 26 formed with serrated edges in the support and can be moved to any required position along the slot. Vertical adjustment of the door is effected by raising the head 38 out of the slot and screwing the pin 37 into or out of the sleeve 31. In modified embodiments the head can have teeth projecting from a lower flat face to engage a double row of holes along the support with a central projection on the face sliding along a slot between the rows (Figs. 6-11 not shown); or the head can have ribbed sides to engage the corrugated sides of a channel section support (Figs. 12, 13 not shown). Instead of the head and pin being disengaged from the support to allow the vertical adjustment, the head can be slidably (but non- rotatably) mounted on the pin so that only the head need be disengaged (Fig. 13 not shown). The support 17 is shown L-shaped in use at the corner of a door but can be flat for use away from the door upright. Two such flat supports or a single long support could be used for a double door arrangement. |
