Booster mount

Claim 1

An arrangement mounting a vacuum power head to a fixed panel from one side of the panel, characterised in that: a panel (44) has a planar panel section with a first opening (46) therethrough; an annular cam plate (48) is secured to one side of the planar panel section about the first opening (46) and has at least three circumferentially spaced cam tabs (50,52,54,56) extending radially inwardly and in axially spaced relation to the planar panel section, each of the cam tabs (50,52,54,56) having an arcuately oriented leading edge (58) and trailing edge (60); a vacuum power head (l2) has an axially and radially extending housing section (66) and a push rod (l6) extending outwardly therefrom, the push rod (l6) being adapted to be axially moved to control the power head (l2); a control arm (l8) is mounted on the opposite side of the panel (44) from the cam plate (48) and has means (22,26; 30,42) connecting the push rod (l6) thereto in axial force-transmitting relation for controlling movements of the push rod (l6) and therefore controlling the power head (l2); an annular cam bracket (68) is secured to the power head housing section (66) about the push rod (l6), the cam bracket (68) having at least three circumferentially spaced bracket tabs (70,72,74,76) extending radially outwardly and in axially spaced relation to the power head housing section (66), each of the bracket tabs (70,72,74,76) having an arcuately oriented leading edge (78) and trailing edge (80); the leading edges (58;72) of at least one set of the said at least three circumferentially spaced tabs ((50,52,54,56; 70,72,74,76) are spaced axially further away from the planar panel section (44) than the trailing edges thereof so that each of the said at least one set of tabs is positioned in a plane which is at an angle to the plane of the planar panel section (44); the bracket tabs (70,72,74,76) are circumferentially spaced in cam-engaging relation with the cam tabs (50,52,54,56) and co-operate therewith by arcuate rotation of the power head (l2) about the axis thereof to secure the power head (l2) to the panel (44) with the leading edges (58;72) of one set of the tabs (50,52,54,56; 70,72,74,76) engaging the other set of tabs in cammed relation adjacent the said other set of tab trailing edges (58;72), the power head (l2) being arcuately rotatable to disengage the bracket tabs (70,72,74,76) from the cam tabs (50,52,54,56) and remove the power head (l2) from the panel (44); the annular cam bracket (68) has an arm (82) extending outwardly therefrom, and the arm (82) and the panel (44) have means (86) removably but lockingly securing the arm (82) and therefore the annular cam bracket (68) to the panel (44) to hold the cam bracket (68) and the power head (l2) in secure relation against rotatational movement while the power head (l2) is secured to the panel (44) as aforesaid.