Patent ID: 8083265
Filing Date: 2011-12-27
Classification: F16L

Abstract:
1. An easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members, the locking coupling assembly including a female tubular coupler which has an inner tubular surface defining a fitting bore for receiving a male tubular end of one of the tubular members, and an outer tubular surface having a radial opening that extends to be communicated with the fitting bore, a lug unit which is disposed on the outer tubular surface adjacent to the radial opening, and a ledge which is disposed on said outer tubular surface and adjacent to the radial opening, and which has a cavity, said cam-lock actuating device comprising: a cam arm which has a cam-surfaced head that is disposed to extend into the fitting bore, and an arm body that is opposite to said cam-surfaced head, and which is pivotally mounted on the lug unit about a pivot axis such that, when said arm body is turned to a locking position, said cam-surfaced head is moved to depress the male tubular end to thereby lock the male tubular end in the fitting bore; a spring-loaded latch bolt unit disposed on said arm body, and including a releasing lever which has weight and power ends opposite to each other, and which is pivotally mounted on said arm body about a fulcrum axis parallel to the pivot axis such that said power end is turnable about the fulcrum axis between a latched position, where said power end is close to the lengthwise line, and an unlatched position, where said power end is remote from the lengthwise line, said weight end being coupled to said latch shank such that, when said power end is turned from the latched position to the unlatched position, said latch end is retracted to disengage from the cavity against the biasing action of said spring.