Closure mechanism

Claim 2

A closure mechanism for an ashtray and the like, comprising a pair of oppositely disposed connector walls, a notch formed in the free end of each of said connector walls, a three sided cover member having an end wall and oppositely disposed side walls, with one of said side walls serving as a door portion, pivotal means formed on the other of said side walls pivotally connected at the ends thereof to said connector walls and adapted to being manually pivoted through a predetermined angle from a first position to a second position corresponding to closed and open positions of said door portion, a detent projection formed on said pivotal means adjacent each end portion thereof and extending along a predetermined plane through the axis of said pivotal means, a generally "U" shaped leaf spring including oppositely disposed side portions and a bottom portion, mounting means formed on the free end of each of said side portions for mounting on respective connector walls, and an "S" shaped connector portion integrally interconnecting the other end of each of said side portions and the adjacent end of said bottom portion, with the loop of each connector portion which is integrally connected to said bottom portion being mounted in said adjacent notch in said connector wall and exerting a force against said adjacent detent projection to thereby retain said door portion of said cover member in its closed position, and said detent projections forcing said loop and said bottom section outwardly while said cover member is pivoted through said predetermined angle until said detent projections are pivoted over-center with respect to said adjacent spring loops to thereby retain said door portion of said cover member in its open position by the force of said spring portions against said detent projections.

Claim 3

A closure mechanism comprising a pair of oppositely disposed support walls, dual notch means formed in one end of each of said support walls, a groove formed in the other end of each of said support walls, a three-sided cover member having an end wall and oppositely disposed side walls, with one of said side walls serving as a door portion, pivotal means formed on the other of said side walls pivotally mounted at the ends thereof in a first portion of said dual notch means and adapted to being manually pivoted through a predetermined angle from a first position to a second position corresponding to closed and open positions of said door portion, a detent projection formed on said pivotal means adjacent each end portion thereof and extending along a predetermined plane through the axis of said pivotal means, generally "U" shaped leap spring including oppositely disposed side portions and a bottom portion, means formed on the free end of each of said side portions for mounting in said grooves on respective support walls, and a connector portion integrally interconnecting the other end of each of said side portions and the adjacent end of said bottom portion, said connector portions being mounted in a second portion of said dual notch means and exerting a force against said adjacent detent projections to thereby retain said cover member in its assembled condition and to retain said door portion of said cover member in its closed position, and said detent projections forcing said spring bottom portion outwardly while said cover member is pivoted through said predetermined angle until said detent projections are pivoted over-center with respect to said adjacent spring bottom portion to thereby cause said door portion of said cover member to be retained in its open position by the force of said spring bottom portions against said detent projections.

Claim 4

A closure mechanism comprising a pair of oppositely disposed support walls, dual notch means formed in one end of each of said support walls, a groove formed in the other end of each of said support walls, a three-sided cover member having an end wall and oppositely disposed side walls, with one of said side walls serving as a door portion, pivotal means formed on the other of said side walls pivotally mounted at the ends thereof in a first portion of said dual notch means and adapted to being manually pivoted through a predetermined angle from a first position to a second position corresponding to closed and open positions of said door portion, a detent projection formed on said pivotal means adjacent each end portion thereof and extending along a predetermined plane through the axis of said pivotal means, generally "U" shaped leap spring including oppositely disposed side portions and a bottom portion, means formed on the free end of each of said side portions for mounting in said grooves on respective support walls, and a connector portion integrally interconnecting the other end of each of said side portions and the adjacent end of said bottom portion, said connector portions being mounted in a second portion of said dual notch means and exerting a force against said adjacent detent projections to thereby retain said cover member in its assembled condition and to retain said door portion of said cover member in its closed position, and said detent projections forcing said spring bottom portion outwardly while said cover member is pivoted through said predetermined angle until said detent projections are pivoted over-center with respect to said adjacent spring bottom portion to thereby cause said door portion of said cover member to be retained in its open position by the force of said spring bottom portions against said detent projections.