An actuation handle having a handle, having a handle neck and rotatably connected to an installation body, is provided. The handle connects to an actuation element in the door or window via a driver. Two detent elements engage in at least one functional position of the handle. An axially movable, non-rotatably mounted detent ring includes a first detent element. A counter detent ring includes a second detent element that corresponds to the first detent element. A guide sleeve provides a non-rotating receptacle for the driver, aligns centrally with the rotary axis of the handle, and has guide elements along its inner circumference. The detent ring has an opening and has guide elements along its outer circumference. The detent ring is inserted into the guide sleeve and the opening receives the driver, while its guide elements are engaged with the guide elements of the guide sleeve in an axially movable manner.

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).

A door latch system (1) comprises a latch (10) and rose bases (60A,B) which clamp together against a door panel through a cross-drilling in the door panel by screws 80 engaging in bosses (94) above and below the latch body (12). The latch body is supported in the cross drilling by an adaptor (40) which in turn supports sleeve extensions (90) of the rose bases to prevent the rose bases from turning on operation of the handle knob/levers attached to the rose bases. The sleeve extensions are open, (that is, C-shaped in section) so that the diameter of the parts of the system within the cross drilling can be minimised, whereby the diameter of the rose bases can likewise be kept within desirable limits of size.

Disclosed herein is a latchbolt retractor (12). The latchbolt retractor (12) comprises a latchbolt retraction mechanism (30) mounted to a carriage (28). The latchbolt retraction mechanism (30) comprising a latchbolt assembly coupler (32) for operational coupling to a latchbolt assembly (22). The carriage (28) is configured to slide along at least one rail (14,16) for positioning the latchbolt assembly coupler (32) relative to the latchbolt.

An installation body for door and/or window handles is composed of a base body that has at least two passage holes for the insertion of fastening screws and a recess providing a receptacle for a detent ring. The base body is made up of a top side and a bottom side. The installation body is equipped with a covering element that is rotatably mounted on the top side of the base body and covers the latter in the first rotary position relative to the base body and allows access to the passage holes in the second rotary position relative to the base To meet aesthetic requirements and prevent visibility of parts of the subconstruction, the bottom side of the base plate is equipped with a lower covering. The covering element and the lower covering part fully surround the base body in the first rotary position of the covering element.

A privacy lock assembly and method of operation are provided. The lock assembly has a push button offset from the central axis of the lock assembly for locking and unlocking the assembly. The lock assembly includes compression springs to maintain integrated handles in predetermined orientations when the handles are not subject to a load.

An exemplary lock includes an outer spindle, a center spindle, and a lock control assembly selectively coupling the outer and center spindles. In one embodiment, the lock control assembly includes a cam coupled to the center spindle, a locking bar slidingly coupled to the outer spindle, a cam follower positioned between the locking bar and the cam, and a biasing element urging the locking bar into engagement with the cam follower. Engagement between the cam and the cam follower may be configured to move the cam follower longitudinally in response to relative rotation between the cam and the cam follower.