BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a landing jack lift according to an embodiment of the present invention.
FIG. 2 is a side view of the landing jack lift shown in FIG. 1 with the landing jack in a down position.
FIG. 3 is a side view of the landing jack lift shown in FIG. 1 with the landing jack in an up position.
DETAILED DESCRIPTION OF THE INVENTION
In the following detailed description of the invention, reference is made to the drawings in which reference numerals refer to like elements, and which are intended to show by way of illustration specific embodiments in which the invention may be practiced. It is understood that other embodiments may be utilized and that structural changes may be made without departing from the scope and spirit of the invention.
Referring to the figures, a landing jack lift 100 is shown having an upright lever portion 105 which is pivotally connected to a base plate 130. Base plate 130 allows landing jack lift 100 to be used in soft soil conditions and provides a stable support in use. A lifting arm 120 is pivotally connected to upright lever portion 105 using a pivot 150. Pivot 150 is a bolt, but other pivoting means may be used such as pins, rivets, etc. as is known in the art. A lifting plate 125 is provided to fit under a landing jack 165 to allow a user to move landing jack 165 without having to bend over or lie on the ground. Lifting plate 125 is pivotally mounted so the as the angle changes with respect to lifting arm 120, lifting plate 125 maintains level contact with landing jack 165. Additionally, lifting plate 125 telescopically fits within lifting arm 120 in order to allow a user to adjust the length.
Because landing jacks 165 have locking pin 170 to retain landing jack 165 in the selected position. Landing jack pin 170 needs to be disengaged when moving landing jack 165. A pin pulling arm 115 is pivotally connected to upright lever portion 105 to hold locking pin 170 in an open position while moving and then released to engage.
A locking pin catch 145 is disposed on an end of pin pulling arm 115 and has a clip edge to retain locking pin 170. Of course other shapes and means may be used as long as locking pin catch 145 selectively catches locking pin 170. Additionally locking pin catch is biased with a coil spring (not shown) to maintain a force on locking pin 170. Of course other biasing means may be used such a coil spring, etc. as long as locking pin 170 is held in an open position while moving landing jack 165.
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A pin 135 is providing to move locking pin catch 145 and moves within a groove disposed along a top portion of pin pulling arm 115 and connects a pin pulling insert arm 140 that telescopically fits within pin pulling arm 115.
Although the instant invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art.
CLAIM
1. A landing jack lift comprising:
· an upright lever portion;
· a base plate;
· said upright lever portion being pivotally attached to said base plate;
· a lifting arm pivotally disposed along a lower portion of said upright lever portion;
· a pin pulling arm rotatably disposed on said upright lever portion and above said lifting arm;
· a lifting plate pivotally disposed on another end of said lifting arm wherein said lifting plate removably fits under a landing jack foot.
2. The landing jack lift according to claim 1 wherein said pin pulling arm has a locking pin holding means for selectively holding said locking pin in an unlocked position.
3. The landing jack lift according to claim 2 wherein said locking pin holding means comprises a spring biased holding clip.
4. The landing jack lift according to claim 1 further comprising a handle portion disposed along an upper end of said upright lever portion.
Task 4. Compare the two versions of patent forming. What are the vivid differences between patent issued nowadays and the patent description applied before?
Text of the invention description to the GB Patent№ 1 078 891 «Improvements relating to Oscillating Conveyors» (invented by William Frederick Woods)
PATENT SPECIFICATION
DRAWINGS ATTACHED 1, 078, 891
Inventor: WILLIAM FREDERICK WOODS
Date of filing Complete Specification: April 16, 1964.
Application Date: April 16, 1963. No. 14887/63.
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Complete Specification Published: Aug. 9, 1967.
Crown Copyright, 1967.
Index at acceptance: – B8 A2
Int. Cl.:– B 65 g
COMPLETE SPECIFICATION
Improvements relating to Oscillating Conveyors
We, Cranmer Engineering Limited, a British Company, of Phoenix Works, Lewes, Sussex, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:–
This invention relates to oscillating conveyors for use in the manufacture of cheese for the purpose of moving curd.
According to the present invention, such a conveyor comprises a trough adapted to convey the curd, the bottom of the trough having the shape of a shallow V and having internal ribs of inverted V section running lengthwise of the trough.
In the manufacture of cheese in a factory, it is necessary after a solidified curd has been formed to advance the curd to a position at which chopping and salting processes can be carried out. Such curd normally is a rectangular block with a surface area of about 300 square inches and a weight of about 28 pounds. The curd which is produced in the manufacture of some types of cheese is difficult to advance on trough conveyors, but we have made the quite surprising discovery that the curd formed in the production of a wide variety of cheese can be satisfactorily advanced in the ribbed trough provided by this invention. Examples of such cheeses are Chedder, Lancashire and Roquefort.
A preferred embodiment of the invention is illustrated in the accompanying drawing in which:
Figure 1 is a transverse sectional view, and
Figure 2 is an elevation of a trough of an oscillating conveyor.
The trough of an oscillating trough conveyor which is illustrated in the drawing is of sheet metal and can be open or closed at both ends or open at one end and closed at the other. The trough has side walls 1 which slope towards the bottom 2 of the trough and which have downwardly inclined out-turned flanges 3 at the top.
The bottom 2 of the trough has two portions which slope towards the longitudinal centre of the trough i.e. the bottom has the shape of a shallow V in cross-section. The bottom 2 is also provided with internal ribs 4 running lengthwise of the trough. The number of ribs depends on the width of the trough. The ribs are of inverted V-shape. A drain cock 5 is arranged in the bottom of the rough near one end.
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WHAT WE CLAIM IS:–
1. An oscillating conveyor for use in the manufacture of cheese for the purpose of moving curd comprising a trough adapted to convey the curd, the bottom of the trough having the shape of a shallow V and having internal ribs of inverted V section running lengthwise of the trough.
2. An oscillating conveyor having a trough substantially as described with reference to the accompanying drawing.
ELKINGTON AND FIFE,
Charted Patent Agents,
High Holborn House,
52/54 High Holborn, London, W.C.1,
Agents for the Appliances
Home Task:
1) Study the structure of Patent Specifications.
2) Try to memorize the words from Appendix B.
Unit 3.
Practice in Class-room
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