Cold room latch
AssigneeKason Industries, Inc.
InventorsBrett A Mitchell, Thomas A Thorsen
Life of this patent
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Abstract
A lockable latch (8) is disclosed for walk-in cold rooms which includes a lockable strike (10) with an exterior strike assembly (16) and an interior release assembly (17). The exterior strike assembly includes a housing (25) and a rod holder (32) configured to releasably hold a coupling rod (35). The exterior strike assembly also has a metal anti-rotation plate (40) removably coupled to the housing. The interior release assembly includes a turn knob (53), an escutcheon plate (54), and an index washer (55). The turn knob includes two oppositely disposed alignment projections (77) and a radial array of steps (78) which includes four, re-occurring series of three steps. The index washer has a four time re-occurring series of steps (93).
Claims15
A cold room latch for a walk-in cold room having a locking handle with a moveable bolt, comprising,
- an exterior strike assembly having a housing and a rod holder coupled to said housing, and
- an interior release assembly having a knob mounting plate, a turn knob coupled to said knob mounting plate for rotational movement relative to said knob mounting plate, said turn knob having a door facing surface with a repeating series of progressively taller sized steps extending towards said exterior strike assembly, a rod coupled at a first end to said turn knob and releasably coupled at a second end to said rod holder of said exterior strike assembly, and an index washer positioned between said turn knob and said knob mounting plate with said rod extending through said index washer, said index washer having a repeating series of progressively taller steps extending towards said turn knob, and retainer for retaining the relative, rotational position of said index washer relative to said turn knob.
A cold room latch for a walk-in cold room having a locking handle with a moveable bolt, comprising,
- an exterior strike housing;
- a rod holder coupled to said housing;
- a strike mounting plate releasably coupled to said exterior strike housing,
- a rod having a first end and an second end oppositely disposed from said first end, said rod first end being releasably coupled to said rod holder;
- a turn knob coupled to said second end of said rod, said turn knob having an adjustment surface facing towards said strike mounting plate, said turn knob adjustment surface having a plurality of reoccurring knob step sets wherein each knob step set has a plurality of knob steps;
- an index washer having a central hole through which extends said rod, said index washer having a plurality of reoccurring index washer step sets wherein each index washer step set has a plurality of index washer knob steps, said index washer being configured to mate with said turn knob at a plurality of different stationary, rotational positions to prevent rotational movement between said index washer and said turn knob, and
- a knob mounting plate coupled to said index washer oppositely from said turn knob, said rod also passing through an opening through said knob mounting plate.
Dependencies are inferred from the claim text.