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Class 254/108 - Pawl actuated


Subclass of Class 254 - Implements or apparatus for applying pushing or pulling force
Definition: Pushing and pulling implement of the step-by-step traveling
No. of patents: 58
Last issue date: 08/23/2011


  2  
NumberTitleIssue Date
4282969Material moving apparatus for a bale wagon
A bale wagon for picking up bales of crop material from the field and forming them into a generally symmetrical pyramidal stack for deposit at a selected location is provided. The bale wagon includes a mobile frame pivotally supporting a stack forming loa...
08/11/1981
4242918Mechanical propulsion system
A system for propelling a vehicle which includes a frame within which at least one shuttle is mounted for reciprocal movement along a linear path of travel. An oscillating body is attached to the shuttle that is capable of delivering a series of alternati...
01/06/1981
4234163Engagement devices
The device is attached to one end of a driving ram located on a mining machine, and comprises a locking ram operable independently of the driving ram. The locking ram is used to force an abutment into locking engagement with an abutment portion in the tra...
11/18/1980
4218043Manual automobile pusher
A manual automobile pusher comprises a long handle ratchet mechanism mounted on one end of a curved hollow rectangular shaped sleeve, a padded cradle connected to the opposite end of the rectangular shaped sleeve, a curved rack post along which the ratche...
08/19/1980
4212450Jacking apparatus
The jacking apparatus comprises a load frame adapted to move relative to a rail having single slots longitudinally spaced therealong. A pawl carriage is disposed inside the frame for movement relative thereto. A single, double-acting hydraulic actuator is...
07/15/1980
4183502Hydraulic chain jack automatic latch control system
A chain jack utilizing two chains is operated by alternately transferring e chain load from latches incorporated within an upper latch assembly to latches incorporated within a lower latch assembly while moving the upper and lower latch assemblies away fr...
01/15/1980
4113234Hydraulic jacks
A hydraulic jack support having a pair of telescopic members, one being a base and the other a bridge movable on the base, and an adjustable platform for supporting a jack engaging the base but adjustable thereon in height whereby the lifting jack is posi...
09/12/1978
4109975Method of bearing a pivoting member intended to transmit great forces and a bearing of such a pivoting member
A method of bearing a pivoting member on an axle which member is intended to transmit great forces between two other members. The pivoting member may constitute a load transmitting latch pivotable between an operative and inoperative position. The latch i...
08/29/1978
4100707Telescopic boom for portable cranes
A telescopic boom, for portable cranes, having one or more hydraulically operated telescopic slides, and one or more mechanically operated telescopic slides. The extension or retraction of the mechanically operated telescopic slide is effected by means of...
07/18/1978
4087013Safety locking means for lift arms of straddle carriers
The vertical lift arms of a straddle trailer are equipped with toothed ratchet bars which move therewith as the lift arms elevate a load. Cooperating pivoted pawls on relatively stationary mounts are spring-biased toward locking engagement with the ratche...
05/02/1978
4067448Lift and supporting system
Systems are described involving (i) a plurality of columns disposed around the object to be lifted, each column having a rack extending longitudinally along one side thereof (ii) means for carrying the object (iii) means keeping the columns upright during...
01/10/1978
4057942Telescopic boom with hydraulic actuating mechanism
A telescopic boom for movable cranes with at least one hydraulically operable telescopic slide and with at least one mechanically operable telescopic slide. The pushing out movement and the retracting movement of the mechanically actuated telescopic slide...
11/15/1977
4032112Climbing jack
A climbing jack is disclosed, wherein the jack comprises a jack column, and two climbing jack sections, connected by a hydraulic cylinder or a pair of hydraulic cylinders. The jack sections climb along the jack column in a crab-style fashion. Each jack se...
06/28/1977
4007915Jacking apparatus
A jacking apparatus comprises a rail having a plurality of pairs of vertical slots longitudinally spaced apart. A sled slides along this rail and has cross members to which are pivotably attached ends of hydraulic cylinders, the other ends of the hydrauli...
02/15/1977
4007914Jacking mechanism
Jacking apparatus is disclosed for effecting relative vertical movement between an upright leg and a platform. The jacking apparatus comprises a frame which includes a cross member mounted on the platform. Vertically spaced first and second fluid cylinder...
02/15/1977
3994475Rack type jacking apparatus
A jacking apparatus comprises a rail with an attached vertical rack having teeth with a steep front face and a sloping back. A notch is arranged in the back of each of the rack teeth. A pair of cars are slidably mounted on the rail with each car carrying ...
11/30/1976
3968801Calf puller
A calf pulling device comprising an elongate rectangular shaft with a multiplicity of apertures formed therein along the length thereof, with a rotatable detachable breech spanner mounted on one end thereof, said shaft having a slidable jack mechanism mou...
07/13/1976
3936032Apparatus with a working platform and adjustable legs therefor
Apparatus with a platform or the like and a plurality of adjustable support legs extending through the platform. Each leg is provided with a device at the upperside of the platform which can effect relative displacement between the leg and the platform. E...
02/03/1976
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