Door lock

• US 4,371,205 A
• Filed: 07/07/1980
• Issued: 02/01/1983
• Est. Priority Date: 07/07/1980
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Americas Company (Caterpillar Incorporated)
• Inventors: Kaveney, John R. Jr.
• Primary Examiner(s): MOORE, RICHARD
• Application Number:
  US06/250,753
• Time in Patent Office: 939 Days
• Field of Search: 292/48, 292/210, 292/216, 292/280, 292/336.3, 292/359, 292/DIG. 24, 292/DIG. 25, 292/196, 292/223, 292/48, 70/145
• US Class Current: 292/48
• CPC Class Codes: E05B 83/36 Locks for passenger or like doors
• CPC Class Codes: Y10T 292/0853 Link and lever
• CPC Class Codes: Y10T 292/57 Operators with knobs or handles
• CPC Class Codes: Y10T 292/96 Latch-spindle catches
• CPC Class Codes: Y10T 70/5389 Manually operable

Abstract

A vehicle door lock (201) and latch (204) assembly is provided whereby a key may be used to lock the door (200) and to prevent rotation of the outside door handle (214). An inside door handle (202) is provided remote from the lock assembly (201) and connected thereto by a linkage (216,232,246) which enables the inside handle (202) to operate the lock assembly (201) by overridng the key lock (308). The inside handle (202) can move the linkage to open the door (200) and lock or unlock the lock assembly (201). The outside handle (214) can open the door (200) only if the lock assembly (201) is unlocked. The lock assembly (201) may be unlocked from the outside only by turning the key in the lock (308) to the unlocked position.

Claims

1. A lock and linkage assembly for a door for a vehicle having a latch structure (204) for latching and locking said door, comprising first and second handle means (214,202) extending outwardly and inwardly from opposite sides of said door, said second handle means (202) being remote from the lock assembly and connected thereto by rod means (216,232), a cam element (282) rotatably mounted in said door, said cam element (282) having one portion (286) engaging with said first handle means (214) for preventing said first handle means (214) from being turned when said cam element (282) is in the locked position, a rotatable bellcrank (242) rotatably mounted in said door and operably connected to said rod means (216,232) and to said second handle means (202), said cam element (282) having a second portion (288) engaging with an abutment (254) on said rotatable bellcrank (242) when said cam element (282) is in said locked position, said second handle means (202) moving said rod means (216,232) and said rotatable bellcrank (242) to move said abutment (254) against said second portion (288) of the cam element (282) to move the first portion (286) of the cam element (282) out of engagement with the first handle means (214) and to move the cam element (282) to the unlocked position, said first and second handle means (214,202) are operative to unlatch the door when said cam element (282) is in the unlocked position.

2. A lock and linkage assembly as claimed in claim 1 wherein said first handle means (214) is an outside handle (214) and said second handle means (202) is an inside handle (202).

3. A lock and linkage assembly as claimed in claim 1 wherein said one portion (286) of said cam element (282) is a cutout (284) forming a wall (286) on a projection (287) from said cam element (282), said first handle means (214) has a tab (278) engaging with said wall (286) to prevent said first handle means (214) from being rotated when said cam element (282) is in the locked position.

4. A lock and linkage assembly as claimed in claim 1 wherein said second portion (288) of said cam element (282) is a projection (288) having a cam surface (289) and a radially directed surface (291), said second handle means (202) being moved to move said abutment (254) into contact with said radially directed surface (291) to move said cam surface (289) against said first handle means (214) thereby moving said cam element (282) to the unlocked position.

5. A lock and linkage assembly for a door of a vehicle having a latch structure (204) for latching and locking said door, said lock assembly comprising a first handle (214) having a lock ring (268) fixed thereon, spaced apart means (276,278) carried by said lock ring (268), rigid stop means (322) extending into position to be contacted by one of said spaced apart means (276, 278), a second handle (202) offset from and extending in a direction opposite to said first handle (214) and reciprocating a linkage (216,232,246) which actuates the latch (204) and rotates a bellcrank (242), said bellcrank (242) being coaxially aligned with said lock ring (268) and being rotatably mounted relative thereto, first spring means (310) for resiliently biasing said bellcrank (242) and linkage (216,232,246) against opening the latch (204), a pair of means (254,256) on said bellcrank (242) with one of said means (256) engaging with one of said spaced apart means (276) on said lock ring (268), locking means (282) pivotally mounted relative to said door, means (286) on said locking means (282) in alignment with one of said spaced apart means (278) on said lock ring (268) when said locking means (282) is in the locked position, second spring means (316) urging said locking means (282) into either a locked or unlocked position, second means (288) on said locking means (282) in contact with one of said means (254) on said bellcrank (242) when said locking means (282) is in the locked position, said locking means (282) in locked position aligns the means (286) on the locking means (282) with one of said spaced apart means (278) on said lock ring (268) to prevent the lock ring (268) and the first handle (214) from being moved in either direction, turning said second handle (202) clockwise will axially move said linkage (216,232,246) to open the latch (204) and also rotate said bellcrank (242) so that the bellcrank (242) moves against said second means (288) on the locking means (282) to pivot the locking means (282) to the unlocked position.

6. A lock and linkage assembly as claimed in claim 5, wherein said linkage (216,232,246) is further connected to said locking means (282) whereby turning the second handle (202) counterclockwise will move said linkage (216,232,246) upward to bias said locking means (282) into a locking position.

7. A lock and linkage assembly as claimed in claim 6, wherein said linkage (216,232,246) comprises a link (216) pivotally secured at its upper end to the second handle (202), at an intermediate point to the latch (204), and at its lower end to a rod (232), said rod (232) connected to a leg (240) on said bellcrank (242) by pin and slot means (244,238) and to a lock link (246) by pin means (248), said lock link (246) is connected to an arm (292) on said locking means (282) by rivet and slot means (296,294), said rivet and slot means (296,294) on said lock link (246) urging said arm (292) and said locking means (282) toward a locking position when said rod (232) is moved upward and said rivet and slot means (244,238) on said rod (232) may either urge one of the means (254) on said bellcrank (242) to pivot the locking means (282) to an unlocked position or be urged by counterclockwise turning of the first handle (214) to move said rod (232) and link (216) to open the latch (204).

8. A lock assembly for a vehicle having a door (200) with an outside panel (203) and an inside panel (205), a latch structure (204) for latching said door (200), and a lock structure (201) for locking said latching structure, said assembly comprising a handle (214) extending through said outside panel (203) and having a lock ring (268) keyed thereon, spaced apart tabs (276,278) projecting from said lock ring (268), stop means (322) carried by said door (200) and extending into position to be contacted by one of said tabs (276) on said lock ring (268), a bellcrank (242) coaxially aligned with said lock ring (268) and rotatably mounted relative thereto, means (216,232) connecting said bellcrank (242) to a latch means (204,212) for unlatching said door (200), said connecting means (216,232) being engaged at its furthest end with a second handle (202) extending through said inside panel (205), spring means (310) for resiliently holding said latch means (204,212) in the latched position, a pair of abutment means (254, 256) on said bellcrank (242) with one abutment (256) of said abutment means (254,256) engaging with said one tab (276) on said lock ring (268), locking means (282) pivotally mounted relative to said door (200), means (284) on said locking means (282) in alignment with the other tab (278) on said lock ring (268) when said locking means (282) is in the locked position, a key lock (308), means (298,302) connecting said locking means (282) to said key lock (308), said last-named means (298,302) having operative means (305) engaging with a portion of the key lock (308) either to selectively operate said key lock (308) or to be selectively operated by said key lock (308), second spring means (316) urging said locking means (282) into either a locked or unlocked position, a cam surface (289) on said locking means (282) in contact with one abutment (254) of the abutment means (254,256) when said locking means (282) is in the locked position, locking said key lock (308) will operate to move said locking means (282) into position to align the means (284) on the locking means (282) with the other tab (278) on said lock ring (268) thereby preventing the lock ring (268) and outside handle (214) from moving in either direction, and turning the second handle (202) clockwise will move the one abutment (254) of the abutment means (254,256) on the bellcrank (242) against said cam surface (289) on the locking means (282) to pivot the locking means (282) and latch means (204,212) to the unlocked and unlatched position.

9. The lock assembly of claim 8, further comprising means (246,292) for linking said locking means (282) to said connecting means (216,232), wherein said connecting means (216,232) may be moved by said second handle (202) to either move said bellcrank (242) to unlock said locking means (282) or move said linking means (246,292) to lock said locking means (282).

10. The lock assembly of claim 9, wherein said connecting means (216,232) comprises a link (216) and rod (232) pivotably connected together, said link (216) being connected to said latch means (204,212), said rod (232) being connected to said bellcrank (242) by pin and slot means (244,238), and said linking means (246,292) being pivotably connected to said rod (232) and connected to said locking means (282) by other rivet and slot means (296,294), and wherein said first and second handles (214,202) when pivoted move said link (216) and rod (232) axially.