GB2172481A - Variable buoyancy float - Google Patents

Abstract

A variable buoyancy float comprising two plastic tubes 3 and 8 of different outside diameters, the smaller tube 3 is used as the top half, being a slide fit into tube 8 used as the bottom half. This bottom tube 8 is fitted at the top with a silicon rubber seal 5 which seals the gap between the two tubes 3 and 8. Two small air vents 1 and 6 allow air to be either drawn in or expelled when the top tube 3 is moved either up or down in the bottom tube 8. A small silicon rubber seal 2 is provided to seal the top air vent 1 when the float is in use. A small piece of plastic tube 4 the same diameter as the bottom tube 8 being aside fit on tube 3 is used to hold the seal 5 in position when adjusting the top tube 3. <IMAGE>

Description

SPECIFICATION Variable buoyancy float This invention relates to a fishing float where the buoyancy can be varied.

Normal fishing floats once attached to line cannot be changed unless a special adapter is used enabling floats of different types to be used. These attachments and floats can be relatively expensive.

Accordingto the present invention, only onefloat is needed, with means for increasing or decreasing the buoyancy.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which, Fig 1 show a completely assembled float, Fig 2 shows top half of float before insertion into bottom half, Fig 3 shows bottom half offloat before insertion of top half.

Referring tothe drawing, the float comprises two plastictubes 3 and 8. The top tube 3 being a slide fit intothe bottom tube 8. Affixedtothe top ofthe bottom tube 8 is a silicon rubber seal Sthrough which the top tube 3 is inserted. This silicon seal 5 provides a water and airtight seal. The top tube 3 when inserted into the bottomtube 8, can be moved up or down, thus altering the amount of air and the buoyancy ofthetubes 3 and 8.

At the base oftube 3 is a plug 7, this is to strengthen the base ofthetoptube 3to prevent damage when inserting through the sealS into the bottom tube 8.

Atthe base, and nearthe top oftube 3 are small air vents 1 and which allow airto be either drawn in or expelled when sliding tube 3 up or down in tube 8to alterthe amount of air or buoyancy oftubes 3 and 8.

A small piece of silicon rubber tube 2 covers the air vent 1 when the float is in use, but is moved awayfrom the vent 1 when altering the amount of air in tubes 3 and 8.

Also on tube 3 is a small piece of plastic tube 4the same diameter as the bottom tube 8. This is used when sliding the top tube3 upwards, by pressing the tube4againstthe seal 5to preventseal 5 pulling away from the bottom tube 8. This small section oftube 4 may also be used to move the silicon rubbertube 2 in an upward direction on tube 3.

1. Avariable buoyancy float with means four varying the amount of air contained in the float 2. Avariable buoyancy float where the weight loading need not be altered if incorrect. The float buoyance is adjusted instead as claimed in 1.

3. A variable buoyancyfloat on which weight can be added or reduced without changing thefloatwhen different casting distances are required by altering float buoyancy as claimed in 1.

4. . A variable buoyancy float where the height of float above water can be altered to suit various weatherandwaterconditions by adjusting buoyancy asolaimedin 1.

5. Avariable buoyancyfloat substantially as de- scribed herein, with reference to Figs 1,2,3 of the accompanying drawing.

The claims were filed later than the filing date within the period prescribed by Rule 25(1) of the Patents Rules 1982.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Variable buoyancy float This invention relates to a fishing float where the buoyancy can be varied. Normal fishing floats once attached to line cannot be changed unless a special adapter is used enabling floats of different types to be used. These attachments and floats can be relatively expensive. Accordingto the present invention, only onefloat is needed, with means for increasing or decreasing the buoyancy. A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which, Fig 1 show a completely assembled float, Fig 2 shows top half of float before insertion into bottom half, Fig 3 shows bottom half offloat before insertion of top half. Referring tothe drawing, the float comprises two plastictubes 3 and 8. The top tube 3 being a slide fit intothe bottom tube 8. Affixedtothe top ofthe bottom tube 8 is a silicon rubber seal Sthrough which the top tube 3 is inserted. This silicon seal 5 provides a water and airtight seal. The top tube 3 when inserted into the bottomtube 8, can be moved up or down, thus altering the amount of air and the buoyancy ofthetubes 3 and 8. At the base oftube 3 is a plug 7, this is to strengthen the base ofthetoptube 3to prevent damage when inserting through the sealS into the bottom tube 8. Atthe base, and nearthe top oftube 3 are small air vents 1 and which allow airto be either drawn in or expelled when sliding tube 3 up or down in tube 8to alterthe amount of air or buoyancy oftubes 3 and 8. A small piece of silicon rubber tube 2 covers the air vent 1 when the float is in use, but is moved awayfrom the vent 1 when altering the amount of air in tubes 3 and 8. Also on tube 3 is a small piece of plastic tube 4the same diameter as the bottom tube 8. This is used when sliding the top tube3 upwards, by pressing the tube4againstthe seal 5to preventseal 5 pulling away from the bottom tube 8. This small section oftube 4 may also be used to move the silicon rubbertube 2 in an upward direction on tube 3. CLAIMS

1. Avariable buoyancy float with means four varying the amount of air contained in the float

2. Avariable buoyancy float where the weight loading need not be altered if incorrect. The float buoyance is adjusted instead as claimed in 1.

3. A variable buoyancyfloat on which weight can be added or reduced without changing thefloatwhen different casting distances are required by altering float buoyancy as claimed in 1.

4. . A variable buoyancy float where the height of float above water can be altered to suit various weatherandwaterconditions by adjusting buoyancy asolaimedin 1.

5. Avariable buoyancyfloat substantially as de- scribed herein, with reference to Figs 1,2,3 of the accompanying drawing.

The claims were filed later than the filing date within the period prescribed by Rule 25(1) of the Patents Rules 1982.