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39results about How to "Minimize play" patented technology

Rotation transmission device

InactiveUS20100314212A1Increase circumferential widthMinimize playBearing assemblyShaft assemblyCamFlange
A rotation transmission device is provided which is small in play in the rotational direction, can be idled with high reliability and is high in torque capacity.An axially movable control retainer 19A and a rotatable rotary retainer 19B are mounted between an outer ring 11 having a cylindrical surface 17 on its inner periphery and an inner ring 12 having cam surfaces on its outer periphery. An opposed pair of rollers 26 and a coil spring 27 for biasing the pair of rollers 26 away from each other are received in each pocket 25 defined between bridges 21 and 23 of the respective retainers 19A and 19B. A torque cam 30 is provided between flanges 20 and 22 of the control retainer 19A and the rotary retainer 19B, respectively. An armature 41 is coupled to the bridges 21 of the control retainer 19A. An electromagnet 43 is provided to face a rotor 42 that axially faces the armature 41 so that when the electromagnet 43 is energized, the control retainer 19A moves toward the rotor 42, and the control retainer 19A and the rotary retainer 19B rotate relative to each other in the direction to reduce the circumferential width of the pockets 25, thereby disengaging the opposed pairs of rollers 26. When the electromagnet 43 is deenergized, the control retainer 19A moves away from the rotor 42 under the biasing force of the separation spring 44, and the control retainer 19A and the rotary retainer 19B rotate relative to each other in the direction to increase the circumferential width of the pockets 25, thereby engaging the opposed pairs of rollers 26.
Owner:NTN CORP

Vehicle seat comprising a height-adjusting mechanism, and a control device for such a seat

Vehicle seat provided with a height-adjusting mechanism comprising a link connected to a rack which is pivotally mounted to the seat cushion and has a circular toothed section meshing with a pinion mounted to the cushion by means of a rigid yoke the plates of which are guided without free play by arcuate guides formed by the rack, a part of the yoke engaging in an arcuate slot formed in the rack.
Owner:FAURECIA

Wearing parts system for detachable fitting of wearing parts for the tool of a cultivating machine

The invention relates to a wearing parts system (1) intended for the tool of a tilling machine of the type which comprises a holder part (3), having a front end part (8), and an exchangeable wearing and / or replacement part (2), arranged over this end part and comprising a hood-shaped (6) hollow (7) which, when the wearing part (2) is fitted in place, is designed to grip over the end part and is fixed thereto by means of at least one locking device (27) placed through interacting openings (28), the end part and the hollow having front, rear and collateral contact zones (9, 22, 23), each comprising contact faces (10, 25, 26), disposed one on the holder part and one on the wearing part, for the absorption of acting vertical, horizontal and collateral forces Fx, Fy and Fz. The contact faces (25, 26) are designed to interact so as, on the one hand, to limit the pushing-on of the wearing part over the holder part and, on the other hand, to ensure that the contact between the contact faces will be made, primarily, at the common centre M0, of the two radii (of a recess and a projection) essentially in the horizontal plane YZ and secondarily, as the wear has progressed, symmetrically about this mid contact point as an increasingly large contact zone (22′, 23′).
Owner:COMBI WEAR PARTS AB

Insert-molded ball joint

Disclosed herein is an insert-molded ball joint which is configured such that rotational frictional torque of a ball stud is kept below the appropriate level, pull-out strength of the ball stud is increased, and play of the ball stud is minimized. The ball stud has a spherical head. The spherical head of the ball stud is rotatably inserted into the ball seat. The housing covers the ball seat and a portion of the spherical head that is exposed from the ball seat. The upper end of the ball seat is disposed higher than the center of the spherical head. The housing includes a head support which covers the spherical head. A ball seat grease groove is formed in the inner surface of the ball seat. Housing grease grooves are formed in the head support in a vertical direction and meet the upper end of the ball seat.
Owner:CENT LTS +3

Wearing parts system for detachable fitting of wearing parts for the tool of a cultivating machine

The invention relates to a wearing parts system (1) intended for the tool of a tilling machine of the type which comprises a holder part (3), having a front end part (8), and an exchangeable wearing and / or replacement part (2), arranged over this end part and comprising a hood-shaped (6) hollow (7) which, when the wearing part (2) is fitted in place, is designed to grip over the end part and is fixed thereto by means of at least one locking device (27) placed through interacting openings (28), the end part and the hollow having front, rear and collateral contact zones (9, 22, 23), each comprising contact faces (10, 25, 26), disposed one on the holder part and one on the wearing part, for the absorption of acting vertical, horizontal and collateral forces Fx, Fy and Fz. The contact faces (25, 26) are designed to interact so as, on the one hand, to limit the pushing-on of the wearing part over the holder part and, on the other hand, to ensure that the contact between the contact faces will be made, primarily, at the common centre M0, of the two radii (of a recess and a projection) essentially in the horizontal plane YZ and secondarily, as the wear has progressed, symmetrically about this mid contact point as an increasingly large contact zone (22′, 23′).
Owner:COMBI WEAR PARTS AB

Leadscrew mechanical drive with differential leadscrew follower structure

A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch. A leadscrew follower structure preferably having two leadscrew followers is engaged to the leadscrew. Each leadscrew follower includes a threaded insert having an insert thread with a nonzero insert thread pitch different front the leadscrew thread pitch. The insert thread is engaged to the leadscrew thread over a circumferential distance of less than one-half turn of the insert thread. Each leadscrew follower further includes a bearing in which the threaded insert is received and which permits the threaded insert to rotate about an insert axis that is inclined to the leadscrew axis by an angle θ for the first leadscrew follower and −θ for the second leadscrew follower, and a bearing support in which the bearing is received. A preload structure biases each of the leadscrew followers against the leadscrew.
Owner:RAYTHEON CANADA LTD

Insert-molded ball joint

Disclosed herein is an insert-molded ball joint which is configured such that rotational frictional torque of a ball stud is kept below the appropriate level, pull-out strength of the ball stud is increased, and play of the ball stud is minimized. The ball stud has a spherical head. The spherical head of the ball stud is rotatably inserted into the ball seat. The housing covers the ball seat and a portion of the spherical head that is exposed from the ball seat. The upper end of the ball seat is disposed higher than the center of the spherical head. The housing includes a head support which covers the spherical head. A ball seat grease groove is formed in the inner surface of the ball seat. Housing grease grooves are formed in the head support in a vertical direction and meet the upper end of the ball seat.
Owner:CENT LTS +3

Door handle retainer system

A door handle assembly providing an entry function includes a sleeve, a spindle and a handle that fits over the sleeve. Gap and play between the handle and the sleeve is eliminated by tightening of a threaded fastener against an inner surface of the handle. A tool is selectively received through an opening in the spindle for tightening the threaded fastener. The opening in the spindle is alignable with an aperture in the handle when in an unlocked condition. The tool is then permitted to extend through the aperture and the opening in the spindle to engage the threaded fastener. A second end of the threaded fastener abuts the inner surface of the handle, securing the handle to the sleeve. Another door handle assembly according to this invention provides a privacy function and includes a threaded fastener that contacts an inner surface of a door handle assembly.
Owner:RAYOVAC CORP

Sliding-type portable terminal

Disclosed is a sliding-type portable terminal including a first housing; a second housing coupled to the first housing so as to slide while facing the first housing; and a sliding module for slidably coupling the first and second housings to each other. The sliding module includes a sliding guide mounted on the first housing, the sliding guide having at least one slit extending in a longitudinal direction; a sliding plate mounted on the second housing, the sliding plate being slidably coupled to the sliding guide and facing the sliding guide; and a hook extending from the sliding plate so as to slide in the slit, the hook extending into the first housing via the slit, an end of the hook being bent so as to face an inner surface of the sliding guide.
Owner:SAMSUNG ELECTRONICS CO LTD

Seat reclining apparatus

A seat reclining apparatus includes a base plate, a ratchet plate, guide grooves formed on the base plate including an internal gear, lock members installed in the guide grooves and each having an outer toothed portion, and an operating member for moving the lock members between engaged and disengaged positions in which an outer toothed portion is engaged and disengaged with the internal gear, respectively. One of the lock members constitutes a small-clearance lock member which is smaller in play in a circumferential direction relative to a guide groove than the remaining lock members when in the engaged position. The small-clearance lock member is provided at the smallest distance between an engagement central position, at which the outer toothed portion and the internal gear are centered about, and an upper end of the seatback side frame.
Owner:TOYOTA BOSHOKU KK

Telescopic shaft

A telescopic shaft is provided. The telescopic shaft includes a first shaft including a first coupler having an inner circumferential surface including an external straight groove and an external inclination groove formed thereon, the external straight groove having a semi-circular cross section and being formed in parallel to a rotation axis and the external inclination groove having a semi-circular cross section, being inclined with respect to the external straight groove at a predetermined angle, and being shaped like a spiral, a second shaft including a second coupler inserted into the first coupler and having an outer circumferential surface including an internal straight groove and an internal inclination groove formed thereon, the internal straight groove having a semi-circular cross section and corresponding to the external straight groove and the internal inclination groove having a semi-circular cross section, being inclined in an opposite direction to the external inclination groove at a predetermined angle with respect to the internal straight groove, and being shaped like a spiral, and a plurality of balls arranged in a line in an axial direction between the external straight groove and the internal straight groove, one ball being arranged between the external inclination groove and the internal inclination groove, wherein the first shaft and the second shaft are coupled to extend and retract in an axial direction, thereby preventing play from occurring in a circumferential direction and preventing separation of balls.
Owner:KOREA FLANGE

Device for pressing a transfer element

InactiveUS20120186378A1Reduces undesirable noiseReduce noiseGearingGearing detailsEngineeringMotorized vehicle
Described is a device for pressing a first transmission element onto a second transmission element engaging with the first transmission element, in particular for a steering system of a motor vehicle, comprising a pressure piece which can be loaded in the direction of the first transmission element and is displaceably guided in a housing. The devices known from the prior art can cause undesirable noise during driving operations. The device according to the invention thus comprises an adjustment unit for minimizing play occurring between the first transmission element and the second transmission element.
Owner:ZF LENKSYST

Hand-held compass saw

A power compass saw (10) with a housing (12) that accommodates a lifting rod for the up and down movement of a longitudinal saw blade (27) attached thereto, the saw blade having a toothed side and a saw blade back (270), and with a guide roller (29) which supports the saw blade back (270) and has a central circumferential groove (290) into which the saw blade extends with its saw blade back (270) and is guided therein, whereby the sides of the circumferential groove (290) are tapered, the power compass saw functioning particularly precisely and efficiently due to the fact that the saw blade back (270) of the saw blade (27) is designed with a 7° conical configuration and / or taper on both sides, so that it tapers toward the saw blade back (270) and is capable of being supported in two dimensions in the circumferential groove (290), the groove sides (291) of which have a 5° taper.
Owner:SCINTILLA AKTIENGES

Bias assembly for ratchet tools

ActiveUSRE44655E1Quantity minimizationMinimal amount of wasted motionSpannersWrenchesEngineeringCounter rotation
A ratcheting tool such as a reversible dual-pawl ratchet wrench is disclosed that minimizes wasted motion during ratchet slip or counter-rotation. The ratchet wrench includes a bias assembly that biases the pawls apart to bias a first, selected pawl for a selected drive direction towards engagement with a ratchet gear, and that the biases the selected pawl into a concentric alignment with the ratchet gear. In this manner, non-ratcheting initial rotation of the pawl due to counter-rotation prior to the pawl camming out of engagement with the ratchet gear is eliminated, thus eliminating wasted motion and maximizing the available angular sweep for the wrench.
Owner:SNAP ON INC

Method for manufacturing an adjustment fitting

A method for producing an adjustment fitting, particularly for a vehicle seat is provided, whereby an outer wheel is associated with a first fitting part, the wheel having inner toothing, and having an inner wheel that can be associated with a second fitting part, the wheel having outer toothing, wherein the inner wheel having the outer toothing is inserted into the outer wheel having the inner toothing eccentrically to a rotational axis in the manner of a wobble mechanism, wherein partial eccentric elements are inserted rotatably with respect to each other in an eccentric receiving chamber formed between the rotational axis and the inner wheel so as to produce variable eccentricity, wherein a transmission element having an engagement element for actuating the partial eccentric element is inserted such that the engagement elements interacts with a catch of the partial eccentric element. In spite of the production tolerances of the components, overall higher quality and higher operational safety of the produced adjustment fitting are to be achieved. For this purpose, the geometry of the partial eccentric element is measured, and the geometry of the transmission element is individually adapted according to the data of the measurement before inserting the transmission element.
Owner:BROSE FAHRZEUGTEILE GMBH & CO KG

Method for manufacturing an adjustment fitting

A method for producing an adjustment fitting, particularly for a vehicle seat is provided, whereby an outer wheel is associated with a first fitting part, the wheel having inner toothing, and having an inner wheel that can be associated with a second fitting part, the wheel having outer toothing, wherein the inner wheel having the outer toothing is inserted into the outer wheel having the inner toothing eccentrically to a rotational axis in the manner of a wobble mechanism, wherein partial eccentric elements are inserted rotatably with respect to each other in an eccentric receiving chamber formed between the rotational axis and the inner wheel so as to produce variable eccentricity, wherein a transmission element having an engagement element for actuating the partial eccentric element is inserted such that the engagement elements interacts with a catch of the partial eccentric element. In spite of the production tolerances of the components, overall higher quality and higher operational safety of the produced adjustment fitting are to be achieved. For this purpose, the geometry of the partial eccentric element is measured, and the geometry of the transmission element is individually adapted according to the data of the measurement before inserting the transmission element.
Owner:BROSE FAHRZEUGTEILE GMBH & CO KG

Sanding machine tool

An oscillating grinder (10) with a housing (12) a grinding sheet holder (14) having clamping means (20, 23; 200, 230; 334) for receiving a grinding sheet (16), whose grinding sheet ends (17, 19) can be clamped firmly to the grinding sheet holder (14), and in which the clamping means (20, 23; 200, 230; 334, 1334) are levers with a pivot axis (24; 224; 40; 440; 1440) supported on the grinding sheet holder side and clamping jaws (22; 220; 1222; 336, 338) that clamp the grinding sheet (16) on one end, preferably manually actuatable on the other end, can be equipped faster, more conveniently and more securely with a grinding sheet (16) by providing that one of the grinding sheet ends (19) for one-handed operation can be clamped solely by insertion between first clamping means (20, 23; 200, 230; 334; 1334), and the other grinding sheet end (17), likewise for one-handed operation, can be clamped after being placed in second clamping means (34; 334; 1334) and after their actuation; the grinding sheet (16) can be tensed tautly by its subsequent motion, together with the clamped grinding sheet end (17), in particular pivoting, away from the first clamping means (20, 23; 200, 230; 334; 1334).
Owner:ROBERT BOSCH GMBH
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