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US 4,304,430 AGranted
Door lock
AssigneeOverhead Door Corporation
InventorDonald S. Harris
Life of this patent
Estimating the term…
Abstract
Lock and latch for a large door, particularly an upwardly opening type, including a housing with an elongated bolt slidably arranged therethrough. A manually operable crank is pivotally mounted within said housing and related to said bolt for moving same lineally upon pivotal movement of said crank. Lineally acting biasing means is operatively positioned between said bolt and said housing for continuously urging said bolt in a locking direction. A latch is pivotally mounted in said housing for movement into and out of a position to engage and releasably hold said bolt in its locked position. Second biasing means operatively positioned between said latch and said housing urges said latch toward said position. The latch and bolt are arranged so that the bolt can be released from its locked position with a minimum of force applied to said latch.
Claims19
A lock assembly mountable upon a door comprising:
- a housing having a front wall and edge wall means having a pair of opposing portions;
- elongated bolt means slidably extending through substantially aligned openings in said pair of opposing portions for lengthwise movement between a locked position and an unlocked position;
- first stop means on said bolt means externally of said housing means;
- spring means disposed between said first stop means and the adjacent one of said opposing portions, said spring means being compressed when said bolt means is in said locked position;
- second stop means on said bolt means between said pair of opposing portions;
- manually operable latch means disposed within said housing for limited relative movement with respect to said housing and said bolt means, said latch means including a latch member floatingly supported for movement within said housing and having catch means thereon engageable with said second stop means for releasably holding said bolt means in said locked position;
- and
- resilient means urging said latch means toward said position of engagement between said catch means and said second stop means.
5 more elements
A lock assembly mountable upon a door comprising:
- a housing having a front wall and edge wall means having a pair of opposing portions;
- elongated bolt means slidably extending through substantially aligned openings in said pair of opposing portions for lengthwise movement between a locked position and an unlocked position;
- first stop means on said bolt means externally of said housing means;
- spring means disposed between said first stop means and the adjacent one of said opposing portions, said spring means being compressed when said bolt means is in said locked position;
- second stop means on said bolt means between said pair of opposing portions;
- manually operable latch means disposed within said housing for limited relative movement with respect to said housing and said bolt means, said latch means having catch means thereon engageable with said second stop means for releasably holding said bolt means in said locked position;
- resilient means urging said latch means toward said position of engagement between said catch means and said second stop means;
- and
- an elongated rigid element arranged generally parallel with said bolt means and held against movement relative thereto, said spring means comprising a coil spring encircling said element externally of said housing.
6 more elements
A lock assembly mountable upon a door comprising:
- a housing having a front wall and edge wall means having a pair of opposing portions;
- elongated bolt means slidably extending through substantially aligned openings in said pair of opposing portions for lengthwise movement between a locked position and an unlocked position;
- first stop means on said bolt means externally of said housing means;
- spring means disposed between said first stop means and the adjacent one of said opposing portions, said spring means being compressed when said bolt means is in said locked position;
- second stop means on said bolt means between said pair of opposing portions;
- manually operable latch means disposed within said housing for limited relative movement with respect to said housing and said bolt means, said latch means having catch means thereon engageable with said second stop means for releasably holding said bolt means in said locked position;
- and
- resilient means urging said latch means toward said position of engagement between said catch means and said second stop means;
- and
- rod means connected to said first stop means, extending through said one opposing portion and being generally parallel with said bolt means, said spring means comprising a coil spring encircling said rod means between said first stop means and said one opposing portion.
7 more elements
A lock assembly mountable upon a door comprising:
- a housing having a front wall and edge wall means having a pair of opposing portions;
- elongated bolt means slidably extending through substantially aligned openings in said pair of opposing portions for lengthwise movement between a locked position and an unlocked position;
- first stop means on said bolt means externally of said housing means;
- spring means disposed between said first stop means and the adjacent one of said opposing portions, said spring means being compressed when said bolt means is in said locked position;
- second stop means on said bolt means between said pair of opposing portions comprising a generally U-shaped saddle, the central portions of said U being rigidly fixed to a vertical face of said bolt means and the arms of said U extending above and below said bolt means;
- manually operable latch means disposed within said housing for limited relative movement with respect to said housing and said bolt means, said latch means having catch means thereon engageable with one of said arms of said saddle for releasably holding said bolt means in said locked position against the urging of said spring means;
- and
- resilient means urging said latch means toward said position of engagement between said catch means and said second stop means.
5 more elements
A lock assembly mountable upon a door comprising:
- a housing having a front wall and edge wall means having a pair of opposing portions;
- elongated bolt means slidably extending through substantially aligned openings in said pair of opposing portions for lengthwise movement between a locked position and an unlocked position;
- first resilient means cooperable with said housing and said bolt means for urging said bolt means toward said unlocked position;
- stop means on said bolt means between said pair of opposing portions;
- latch means disposed within said housing for limited relative movement with respect to said housing and said bolt means, said latch means including a latch member floatingly supported for movement within said housing and having catch means thereon engageable with said stop means for releasably holding said bolt means in said locked position;
- second resilient means urging said latch means toward said position of engagement between said catch means and said stop means;
- and
- release means for moving said latch means to effect a release of said engagement between said catch means and said stop means.
5 more elements
Dependencies are inferred from the claim text.