Abstract: An adjustment device for automatically adjusting clearance between components of a brake mechanism including a movable member operable by a vehicle operator to move a braking member from a clearance position into contact with a rotating member. The adjustment device includes a threaded shaft having a portion operatively coupled to a tubular member by means of a clutch. As wear occurs in the brake mechanism, the clutch permits relative movement between the threaded shaft and the tubular member in a first direction of movement of the movable member, and transmits movement therebetween in a second direction of movement of the movable member to cause rotation of the threaded shaft and maintain a constant clearance.

Abstract: A band brake assembly includes a housing which carries a rotatable member and a band with a friction lining substantially surrounding the rotatable member. A parking brake lever is connected to a parking brake actuator and also to a plurality of links which are connected to respective ends of the band. The parking brake lever engages the housing and pivots relative to the housing to move the links and separate the band ends and contract the band in response to the movement of the parking brake actuator. A pivotal connection joins the links to each other and to the parking brake lever.

Abstract: A band brake for a clutch comprises a band, passed in a loop around a cylindrical bearing surface of a driven part of the clutch, and an operating member adapted to apply the brake band against part of the bearing surface, the operating member comprising two pistons hydraulically moveable in opposite directions in the same cylinder, one piston acting on the brake band and the other piston on the bearing surface, the pistons being actuated to brake the driven part of the clutch when the clutch is disengaged.

Abstract: A brake device for a friction press having a flywheel for driving a vertical threaded shaft, the flywheel being positioned between a pair of friction discs, the flywheel being driven in one direction or the other by the respective wheels. The brake device has a brake band generally in the shape of a circular arc which is engagable with the circumference of the flywheel at a position between the friction faces of the friction discs. The brake band is normally to be pressed by a tension spring against the circumference of the flywheel at all positions of the flywheel during its up and down movement, and a hydraulic device is provided which usually acts against the tension of the spring, to hold the brake band away from the flywheel but can apply the brake force instantaneously when necessary by ending the action of the hydraulic device.

Abstract: The present invention relates to an improvement in a band brake wherein a plurality of rotors and stators provide for braking a rotatable member when a friction lining on the band brake is engageable with the rotatable member. The rotatable member carries an axially extendible assembly which is engageable with the friction lining to provide for extension of the axially extendible assembly. When the assembly is extended, the rotors which rotate with the rotatable member and the stators which are carried by a support housing are moved axially into frictional engagement with each other. The extendible assembly comprises a first element carried by a key on the rotatable member to impart rotation with the rotatable member and permit axial movement relative to the rotatable member, and a second element resiliently connected to the first element.

Abstract: A band brake assembly includes a band which carries a friction lining for engagement with a rotatable member. A casing surrounds the band and a hydraulic actuator cooperates with a pair of links which are engaged with respective ends of the band. When the hydraulic actuator is operated, the hydraulic actuator is moved toward the rotatable member such that the pair of links are pivoted oppositely about the moving hydraulic actuator. The pivoting links are coupled to the band such that movement of the hydraulic actuator causes the band to contract the friction lining into engagement with the rotatable member. The pair of links are optionally provided with rollers which roll on the casing and the hydraulic actuator when the latter is operated. It is also possible to eliminate the casing so that the rollers roll on the band when the hydraulic actuator is operated.

Abstract: A device for temporarily holding fast a free circular element with respect to a fixed circular element having circular segments with tangential ramps and a rigid ring with rollers axially rotatable thereon for local thrust against the ramps to cause locking of the free circular element with respect to the fixed circular element. Clevises bearing axial grooved rollers riding on the rigid ring, with the clevises connected to the segments by springs, providing an elastic restoring force to release the free circular element with respect to the fixed circular element.

Abstract: This invention is a brake apparatus connected to a screw machine to supplement the normal braking system therein. The brake apparatus includes an actuator assembly connected to a brake assembly. The actuator assembly includes an elongated connector rod having an actuator handle assembly connected to each opposite end of the connector rod and operable to move same axially. The brake assembly includes (1) an actuator arm assembly secured to the connector rod; (2) a support and linkage assembly connected to the actuator arm assembly; and (3) a brake band assembly connected to the support and linkage assembly. The brake band assembly includes a brake band member engagable with a brake drum member which, in turn, is operably connected to the main drive shaft of the screw machine. The connector rod is selectively moved axially to tighten the brake band member about the brake drum member for stopping rotational movement of the main drive shaft.

Abstract: A coil spring is provided which extends around and along a peripheral cylindrical surface formed of a cylindrical boss defined at the central portion of a rotary body and an adjacent cylindrical mounting tube of a bicycle wheel hub to which the rotary body is screwed for rotation therewith. When the rotary body receives braking torque from a braking surface applied thereto in a manner which would cause an unscrewing of the rotary body from the mounting tube, the coil spring becomes smaller in diameter to tighten about the cylindrical boss and mounting tube to prevent the unscrewing of the rotary body.

Abstract: A hydraulic back-up system for use in combination with an equalizer beam of a drawworks brake system during the drilling of an oil and/or gas well bore for reducing the hazards in the event of failure of the drawworks braking system by automatically locking the equalizer beam in order that a single brake band of a two-brake band system will function for holding the load in an emergency situation.

Abstract: A brake band is provided which is useful particularly in connection with transmissions. The band has welded at each free end thereof a bracket. The brackets are provided with recesses to receive the actuating struts which abut against one end of the recesses to cause closing of the band in a drum.

Abstract: A braking system including a sensing lever operated when the forward portion of a chain saw moves upwardly with a jerk due to a kickback phenomenon or the hand of an operator slips from a handle during operation, a brake device, and a direct-acting interlocking member connecting the sensing lever to the brake device. A force exerted on the sensing lever and a force of a spring locking the sensing lever are both transmitted to the brake device through the interlocking member.

Abstract: Disclosed herein is an improved hand truck having stair climbing capabilities of the general type employing a pair of star-like plates journaled on a main axle and carrying a plurality of stub axles on the projecting legs of the plate with each axle carrying a wheel to facilitate ascending or descending stairs. The type of truck in question operates so that one of the wheels will be in contact with the lands of two adjacent steps at all times to avoid jarring and to facilitate movement. The improvement disclosed includes the provision of braking means which will prevent "free-wheeling" of the plate so as to effectively slow up movement of the truck particularly when descending. The brake is operated from the handle end of the truck and releasably engages the main axle to either permit or prevent "free-wheeling" of the star-like plates to thereby selectively inhibit movement of the truck.

Abstract: A throttle control device for use with a spring-return throttle wherein a rotatable sleeve on a handlebar must be rotated to advance the throttle, the throttle control device including a clamping arrangement receivable over the rotatable sleeve to be just forward of a handgrip normally received over the sleeve, the clamping arrangement having a tab that engages conventional equipment to prevent rotation of the clamping means, and including a lever operated cam for clamping the sleeve to hold the throttle in a pre-set position, the clamping arrangement being held in position by the handgrip.

Abstract: A guard member is mounted on the chain saw for swinging movement between an actuate position and a reset position. The guard member occupies a normal position between the actuate and reset positions. A brake band is integral with a bowed column spring which applies the braking force to arrest movement of the cutting chain. A latching mechanism includes an arm with a latch pin engaged by a yieldable latch finger; this latch finger is integral with the bowed column spring. The guard member deflects the latch finger in response to movement of the guard to its actuate position; this action allows the column spring to apply the brake. The guard member is moved to its actuate position in response to a sudden movement of the chain saw, as in the case of "kickback"; this movement of the guard member is brought about by inertia or the engagement of the guard with the operator's body (most likely the wrist or the back of his hand) during this abrupt movement of the chain saw.

Abstract: A hydraulic brake system for the hoist drum of a lifting crane to achieve good control over loads being held or lowered by the load line wrapped on the hoist drum comprises a brake band for exerting a braking force on the hoist drum. The system further comprises a brake cylinder for operating the brake band; a brake valve for controlling the supply of fluid from a fluid source to the brake cylinder; a brake pedal for operating the brake valve and movable between a brake release position and a brake applied position; a valve toggle linkage connected between the foot pedal and the brake valve piston to cause the brake valve to supply fluid to the brake cylinder at a predetermined pressure when the pedal is depressed to a first brake applied position and for applying fluid at a greater pressure when said pedal is moved to a second brake applied position which offers a mechanical advantage; and a hydraulic simulator for adjusting the position to which the foot pedal can be depressed.

Abstract: Disclosed is a braking mechanism for a hand-held, motor-driven chain saw, comprising: a brake drum which rotates with the drive for the saw chain; a braking member positioned to selectively contact the brake drum in order to stop the chain; a lever pivotably mounted on the saw and extending to the vicinity of the guide handle; an arm, preferably a V-shaped rocker arm having a locking recess therein, pivotably connected to the saw and connected to the braking member for selectively moving the braking member into contact with the brake drum upon rotation of the arm into a braking position; a spring connected to the saw and to the arm for biasing the arm toward the braking position; a tongue member pivotably attached to the saw and adapted to be moved in contacting relationship with the arm, and to preferably engage in the locking recess in the arm, to move the arm at least out of the braking position and lock it there; and a cam member, separate from the tongue member, pivotably connected to the saw and respons

Abstract: A control linkage for a band-type brake having an actuating lever provided with a pair of anchor pins, a brake band adapted to be trained about a rotary element to be braked in either direction of its rotation, the band having one end connected to one of the anchor pins, an adjustment bracket connected to the other of the pins, and the other end of the band being connected to the adjustment bracket, and an anchor bracket having upwardly and downwardly opening slots loosely receiving the pins with the pin connected to the adjustment bracket being disposed in the downwardly open slot. A spring resiliently biases the pin in a downwardly open slot upwardly into engagement with the bottom of its associated slot to provide smooth braking action.

Abstract: An improved self-actuating linkage for a flexible band-type brake which eliminates binding or locking of the brake. The linkage includes a pair of pivotally supported L-shaped levers connected to the brake band. The levers cross and are pivotally connected to a cam member. The cam member has a pair of angularly related slots extending outwardly from a line through the axis of the drum and slidably receiving the pivotal connections to the levers. The brake is actuated by tensioning the cam member and the brake is released by movement of the cam member toward the brake drum, whereby the levers are spread within the angularly related slots to assure release of the brake band.

Abstract: A chain saw safety brake including a snap-acting, over-center actuating mechanism.A chain saw safety brake and method of operation characterized by an actuation accelerator interposed between a brake mechanism and a brake actuating mechanism. A biasing means is operable to bias the brake actuating means toward a nonactuating position with a relatively lower biasing force. The biasing means is operable to bias the brake actuating means toward an actuating position with a relatively higher biasing force.

Abstract: The invention relates to an improved type of band brake, suitable for fitment to vehicle wheels, wherein the ends or fixings of the band intermesh and project past each other to be attached to anchorage points, movable or otherwise. Alternative systems and linkages of band brake application are disclosed, as well as improved configurations of band assembly, intermeshing band ends, and tensile load carriers or cores. Ways are disclosed for more accurately controlling and distributing the loads set up within a band brake on application.

Abstract: A wet type band apparatus characterized by the construction that, in the wet type band brake apparatus provided on the outer periphery of the brake drum with the lining fixed on the inner periphery of the brake band, a groove is cut on the contact surface of the lining in the peripheral direction, oil holes are perforated through the brake band and lining with their openings in the groove and at the same time, lubricating oil is supplied to the aforesaid oil holes and the discontinuous part located at the opening of the aforesaid brake band respectively.

Abstract: An automatically adjusting braking device in a band brake of a vehicle for automatically adjusting the gap between the brake drum and lining, and which has an adjusting component connected to the brake band and a feed mechanism for driving the adjusting component. The feed mechanism is connected between the adjusting component and a piston rod of a hydraulic cylinder piston assembly. Thus, a reduction in the braking force due to wearing of the brake lining is prevented.

Abstract: A portable chain saw includes a flexible brake band for stopping the cutter chain. A sensing arm is pivotally mounted on the chain saw housing, with the brake band being connected to this sensing arm. The sensing arm is arranged to be engaged by an arm or hand of an operator so as to be swung forwardly in a brake-tightening manner. The sensing arm is continuously biased forwardly to a braking position by a coil compression spring. A latch normally holds the sensing arm in a rest position. The latch comprises a metallic strip one end of which is fixedly secured to the housing. The other end of the strip has a bent configuration defining a notch for receiving a curved projection of the sensing arm to retain the latter. The strip extends forwardly from the housing in overlying position above the spring and projection.

Abstract: A fishing reel, particularly a fly fishing reel, which is provided with an auxiliary drag assembly actuated by finger pressure exerted radially inwardly on the assembly. The reel includes a line receiving spool with the spool flanges having an outer peripheral edge defining a braking surface. The frame means includes a circular spool retaining ring comprising first and second concentrically disposed arcuate sectors, with the arcuate sectors having a substantial degree of arcuate overlap wherein one of the sectors is provided with an arcuate cantilevered segment which may be forced inwardly by finger pressure to make contact with the outer edge surface of the spool flange so as to generate frictional drag resisting free rotation of the line spool within the frame.

Abstract: An improved winch-type device for establishing and maintaining tension in a tie rope, cord, or cable is disclosed. The novel device is self-locking and does not require a ratchet or other locking mechanisms as used in convention winch devices. The device comprises a reel consisting of two end discs which are joined together at their centers by a spindle, i.e., an elongate shaft. The end discs of the reel are supported by a pair of bearing members in which the bearing faces thereof substantially enclose and make sliding contact with the perimeters of the respective discs. The bearing members are interconnected by a connecting member extending from one of the bearing members to the other so as to hold the bearing members in fixed position about the respective discs. A crank member is associated with one of the end discs for rotating the reel within the bearing members.

Abstract: Cruise control apparatus for releasably holding a hand grip throttle at any given throttle position comprises a fixed position slip ring slidably riding around the outer periphery of a collar securely fastened to a rotatable hand grip throttle control. The slip ring comprises an open section with tabs extending from opposed ends of the slip ring facing the open section. A thumb actuated cam lever is employed to selectively squeeze the tabs of the slip ring together so as to clamp the slip ring on the periphery of the secured collar and hold the throttle in any desired position. The cam lever is easily released to effect immediate release of the cruise control whenever manual control is desired.

Abstract: A band brake in accordance with the present invention comprises a resiliently flexible band the ends of which are pulled apart to operate the brake. In the overlapping region at least the band comprises a plurality of meshing elements.

Abstract: A pendulum brake for cushioning pendulum movements, especially for grab buckets of hydraulically operable earth dredges in which the pendulum brake is arranged at the free end of the shank. A grab bucket holder and a drum are by means of fitting keys non-rotatably connected to a bolt which serves as shaft and is rotatably journaled in bearings at the free end of the shank. The drum cooperates with two clamps provided with brake linings while the clamps embrace the drum and by means of a clamping screw and dish springs exert a pressure upon the drum.

Abstract: A device for automatically actuating a band brake on a motor saw for emergency stopping of the saw chain, wherein a latching mechanism including pretensioned elastic force-providing coupling is released, occurring upon a throw movement of the saw, by a pin or the like transferring a force between a carrying handle of the saw and a collapsable arm of the mechanism.

Abstract: A chain saw safety brake including a snap-acting, over-center actuating mechanism.A chain saw safety brake and method of operation characterized by an actuation accelerator interposed between a brake mechanism and a brake actuating mechanism. A biasing means is operable to bias the brake actuating means toward a nonactuating position with a relatively lower biasing force. The biasing means is operable to bias the brake actuating means toward an actuating position with a relatively higher biasing force.