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A push button lock for mounting at an opening formed through a door panel near an edge of the door includes a flush mountable exterior housing having a thin mounting flange that encircles central housing portions that are configured to extend into the door panel opening, and a surface mountable inte

A push button lock for mounting at an opening formed through a door panel near an edge of the door includes a flush mountable exterior housing having a thin mounting flange that encircles central housing portions that are configured to extend into the door panel opening, and a surface mountable interior housing that defines a bolt passage that carries a spring-projected slide bolt having an end formation configured to latchingly engage a suitably configured striker. The interior housing and the mounting flange of the exterior housing overlap and are clamped toward engagement with interior and exterior door panel portions that extend about the opening. The interior and exterior housings define button passages that intersect with the bolt passage, within which interior and exterior push buttons are slidably carried, with inner end regions of the buttons defining inclined cam surfaces that are configured to matingly engage separate interior-facing and exterior-facing inclined cam surfaces formed on the slide bolt so that, when either of the buttons is pressed, the engagement of its cam surface with one of the cam surfaces of the slide bolt will cause the slide bolt to retract from latchingly engaging the striker. A key-operated lock cylinder carried by the exterior housing and a locking knob carried by the interior housing each are operable to move a locking cam into and out of the path of the slide bolt to selectively permit and prevent slide bolt retraction.

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A push-button lock for mounting on a door panel or the like at the location of a door panel opening having a front end region that opens through a front surface of the door panel and a rear end region that opens through a rear surface of the door panel, comprising: a) flush mountable means including

A push-button lock for mounting on a door panel or the like at the location of a door panel opening having a front end region that opens through a front surface of the door panel and a rear end region that opens through a rear surface of the door panel, comprising: a) flush mountable means including a flush mountable housing having a front surface defined in part by a relatively thin, perimetrically extending mounting flange that also defines a rear surface configured to overlie front surface portions of a door panel that surround a front end region of a door panel opening at a location where the lock is to be mounted so as to close the front end region of the opening, with the flush mountable housing also having central portions that are configured to extend rearwardly into the front end region of the door panel opening when the rear surface of the mounting flange is positioned to closely overlie said front surface portions, with the rearwardly extending central portions defining a finger-receiving recess that opens through said front surface, and a first push button passage that opens through said front surface at a first button opening, and that extends rearwardly from the first button opening and through the central portions of the flush mountable housing; b) surface mountable means including a surface mountable housing having spaced front and rear faces that border central portions of the surface mountable housing which are perimetrically bounded by side wall means that connects the front and rear faces, with the rear face of the surface mountable housing having peripheral portions that are configured to overlie rear surface portions of the door panel that surround the rear end of the door panel opening at said location so as to close the rear end of the opening, with said central portions of the surface mountable housing defining a slide bolt passage 1) that is oriented transversely relative to the first push button passage, 2) that intersects the first push button passage, and 3) that has a passage end opening defined where the slide bolt passage opens through said side wall means, with said central portions of the surface mountable housing also defining a second push button passage 1) that substantially parallels the first push button passage, 2) that intersects with the slide bolt passage, and 3) that opens through said front face at a second button opening; c) fastener means for mounting the flush mountable housing and the surface mountable housing on the door panel by clamping the flush mountable housing and the surface mountable housing toward each other at said location so that the flush mountable housing and the surface mountable housing close said front and rear end regions of the door panel opening, respectively; d) an elongate slide bolt slidably mounted in the slide bolt passage for movement between latched and unlatched positions, with the slide bolt defining end formation means for projecting from said passage end opening when the slide bolt is in its latched position for latchingly engaging a suitably configured striker to latch the door panel in a closed position, and for retracting to disengage the striker when the slide bolt is in its unlatched position, with the slide bolt also defining 1) a first inclined cam surface that extends in a first plane that faces toward the first push button passage at an intersection of the first push button passage with the slide bolt passage, and 2) a second inclined cam surface that is oppositely inclined relative to the first inclined cam surface in that the second inclined cam surface extends in a second plane that faces away from the first push button passage and toward the second push button passage at an intersection of the second push button passage with the slide bolt passage; e) biasing means for biasing the slide bolt away from its unlatched position toward its latched position; f) first push button means slidably mounted in the first push button passage having an outer end region that is configured to project from said first button opening when the first push button means is in a normal position, and that can be moved to an operated position by depressing the outer end region of the first push button means, with the first push button means also defining first inner end means configured to engage and cooperate with the first inclined cam surface of the slide bolt when the first push button means is moved to its operated position to cause the slide bolt to retract to its unlatched position in opposition to the action of said biasing means; g) second push button means slidably mounted in the second push button passage having an outer end region that is configured to project from said second button opening when the second push button means is in a normal position, and that can be moved to an operated position by depressing the outer end region of the second push button means, with the second push button means also defining second inner end means configured to engage and cooperate with the second inclined cam surface of the slide bolt when the second push button means is moved to its operated position to cause the slide bolt to retract to its unlatched position in opposition to the action of said biasing means; h) wherein a selected one of said first and second inclined cam surfaces is defined by a single inclined surface situated within a cavity formed within the slide bolt at a location substantially centered between opposite sides of the slide bolt passage, and said other of the first and second inclined cam surfaces is defined by a pair of identically inclined surface portions formed on the slide bolt adjacent said opposite sides of the slide bolt passage, with the pair of identically inclined surface portions being located along the length of the slide bolt in sufficiently close proximity to said cavity to nest at least a portion of said cavity therebetween; and, i) wherein a selected one of the first and second inner end means is defined by a single, centrally located projection that extends into said cavity to engage said single inclined surface, and the other of the first and second inner end means is defined by a pair of spaced projections that extend into engagement with said pair of identically inclined surfaces.