EP0272047A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A pivotable screw jack drive
Assignee: SMR Automotive Australia Pty Ltd
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Filing: 1987-12-09
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Granted: —
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Expires: 2007-12-09
Abstract
Abstract A pivotable screw jack drive for a tiltable element (11,12) such as a rear view mirror of a motor vehicle, wherein a motor driven worm wheel (31) also performs the function of a jacking nut (29) which rotates about a jacking screw (35), the projecting end (41) of the jacking screw being connected to the tiltable element (11,12) for universal pivotal movement but being restrained against relative rotation, the jacking nut (29) being mounted in a housing (22) with a ball joint so that the nut and screw pivot as an assembly.
Inventors
- 👤 Garry Gordon Leslie Fimeri
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 00:12
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/02; B60R1/04; B60R1/06; B60R1/062; B60R1/07; B60R1/072; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18584; Y10T74/18792; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/20; Y10T74/20207
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
194 words
In combination with a tiltable element (11,12), a pivotable screw jack drive (23) for tilting control of the element, comprising a housing (22), a jacking nut bearing surface (27) in a wall of the housing, a jacking nut (29) having an outer surface (28) which is also a bearing surface, an inner threaded surface (30), and a series of gear teeth (31) spaced around its periphery defining a worm wheel, at least one of the bearing surfaces being of part spherical shape, a motor assembly (24) within the housing having an output shaft, a drive worm (25) on the output shaft in driving engagement with the worm wheel teeth (31), a jacking screw (35) having a first end with a threaded male portion (38) which threadably engages said inner threaded surface of the jacking nut, and a second end (41) which engages said element for relative pivotal movement about an axis which is perpendicular to the axis of the screw, and restraining means (42) for restraining the screw (35) from rotation, the arrangement being such that, upon motor rotation, the nut extends or retracts the jacking screw and effects tilting of the element (11,12).
Claim 2
Dependent Claim
194 words
In combination with a tiltable element (11,12), a pivotable screw jack drive (23) for tilting control of the element, comprising a housing (22), a jacking nut bearing surface (27) in a wall of the housing, a jacking nut (29) having an outer surface (28) which is also a bearing surface, an inner threaded surface (30), and a series of gear teeth (31) spaced around its periphery defining a worm wheel, at least one of the bearing surfaces being of part spherical shape, a motor assembly (24) within the housing having an output shaft, a drive worm (25) on the output shaft in driving engagement with the worm wheel teeth (31), a jacking screw (35) having a first end with a threaded male portion (38) which threadably engages said inner threaded surface of the jacking nut, and a second end (41) which engages said element for relative pivotal movement about an axis which is perpendicular to the axis of the screw, and restraining means (42) for restraining the screw (35) from rotation, the arrangement being such that, upon motor rotation, the nut extends or retracts the jacking screw and effects tilting of the element (11,12).
Claim 3
Dependent Claim
19 words
A pivotable screw jack according to claim 1 wherein the envelope shape of the worm wheel (31) is cylindrical.
Claim 4
Dependent Claim
48 words
A pivotable screw jack according to claim 1 or claim 2 wherein said restraining portion of said second end of the jacking screw comprises a restraining spigot (42) which so engages a complementary surface of a slot (43) in the element as to restrain the screw from rotation.
Claim 5
Dependent Claim
60 words
A pivotable screw jack according to any preceding claim wherein said housing bearing surface (27) and said jacking nut outer surface (28) are complementary part spherical surfaces, and wherein jacking screw second end (41) also comprises a part spherical surface, and said element (12) contains a part spherical socket (44) complementary to and engaged by said screw part spherical surface.
Claim 6
Dependent Claim
74 words
A pivotable screw jack according to any preceding claim further comprising a mounting plate (15), means (20,21) joining the housing (22) to the mounting plate (15), a spring (48) engaging a part spherical surface (28) of said jacking nut (29), the spring (48) having projecting limbs (49) which react against a surface of the mounting plate (15), thereby retaining said jacking nut outer surface (28) in contact with said jacking nut bearing surface (27).
Claim 7
Dependent Claim
33 words
A pivotable screw jack according to claim 5 further comprising a soft gasket (40) contiguous with a surface of said mounting plate (15) and between said mounting plate (15) and spring limbs (49).
Claim 8
Dependent Claim
55 words
A pivotable screw jack according to claim 1 wherein said jacking screw first end is bifurcate, having two limbs (36) each with outer curved thread surfaces (38) which threadably engage said inner threaded surface (30) of the jacking nut (29), and a "U"-shaped spring (37) between said limbs urging their threaded surfaces into that engagement.
Claim 9
Dependent Claim
26 words
A pivotable screw jack according to claim 1 wherein said tiltable element (12) comprises a backing plate of a rear vision mirror for a motor vehicle.
Claim 10
Dependent Claim
170 words
A rear vision mirror assembly for a motor vehicle comprising a backing plate (12), a surface (13) of the backing plate which defines a first element of a first ball and socket joint, a mounting plate (15), a second element (14) on the mounting plate, said first ball and socket joint engaging the first element (13) thereof for relative pivotal and rotational movement of the backing plate with respect to the mounting plate, two further surfaces (44) of the backing plate defining respectively first elements of second and third ball and socket joints in the backing plate, which subtend an angle of 90° with the first said ball and socket surface (13), two pivotable screw jack drives (23), each according to claim 1, and mounting means (22) mounting said screw jack drives (23) to the mounting plate (15), said second ends (41) of said jacking screws (35) comprising the second elements of said second and third ball and socket joints, and pivotally engaging respective said further backing plate surfaces (44).
Claim 11
Dependent Claim
93 words
A rear vision mirror assembly according to claim 9 wherein each ball and socket joint first element (13,44) is a socket and second element (14,41) its complementary ball, and further comprising slot surfaces (43) in said backing plate (12) defining two slots opening into said second and third sockets (44) and directed therefrom towards the first said ball and socket joint (13,14), and respective spigots (42) projecting from the balls (41) of said second and third ball and socket joints (41,44) engaging walls of said slots and restraining those balls (41) against rotation.
Claim 12
Dependent Claim
19 words
A pivotable screw jack drive substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Claim 13
Dependent Claim
19 words
A pivotable screw jack drive substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Claim 14
Dependent Claim
19 words
A rear vision mirror assembly substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Claim 15
Dependent Claim
19 words
A rear vision mirror assembly substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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