AU691519B2 - A folding handle for a chain winder - Google Patents

A folding handle for a chain winder Download PDF

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Publication number
AU691519B2
AU691519B2 AU75874/94A AU7587494A AU691519B2 AU 691519 B2 AU691519 B2 AU 691519B2 AU 75874/94 A AU75874/94 A AU 75874/94A AU 7587494 A AU7587494 A AU 7587494A AU 691519 B2 AU691519 B2 AU 691519B2
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AU
Australia
Prior art keywords
handle
shaft
knob
arm
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU75874/94A
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AU7587494A (en
Inventor
Mervyn George Harcourt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Assa Abloy Australia Pty Ltd
Original Assignee
Whitco Pty Ltd
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Filing date
Publication date
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Priority to AU75874/94A priority Critical patent/AU691519B2/en
Publication of AU7587494A publication Critical patent/AU7587494A/en
Application granted granted Critical
Publication of AU691519B2 publication Critical patent/AU691519B2/en
Assigned to LOCKWOOD SECURITY PRODUCTS PTY LIMITED reassignment LOCKWOOD SECURITY PRODUCTS PTY LIMITED Alteration of Name(s) in Register under S187 Assignors: WHITCO PTY. LTD.
Assigned to ASSA ABLOY AUSTRALIA PTY LIMITED reassignment ASSA ABLOY AUSTRALIA PTY LIMITED Request to Amend Deed and Register Assignors: LOCKWOOD SECURITY PRODUCTS PTY LIMITED
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

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Description

1
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT a a.
a.
Name of Applicant: Actual Inventor: Address for Service: Invention Title: WHITCO PTY LTD MERVYN GEORGE HARCOURT CULLEN CO., Patent Trade Mark Attorneys, 240 Queen Street, Brisbane, Qld. 4000, Australia.
A FOLDING HANDLE FOR A CHAIN
WINDER
Details of Associated Provisional Applications: Nos. PM2473 The following statement is a full description of this invention, including the best method of performing it known to us: i, 2 THIS INVENTION relates to a folding handle for a chain winder for opening and closing awning type windows.
Awning type windows are typically hinged at the top and fitted with an insect screen and are usually opened and closed by a chain winder consisting of a casing secured to the sill of the window and has a handle for rotating, within the casing, a sprocket engaging a length of chain arranged to form a loop within the casing and anchored at one end to the casing. The other end of the chain extends through an opening in the casing and was provided with an attachment plate for attachment to a window. Rotation of the handle in one direction causes the chain to move out from the casing and the chain is of such a character that it formed a fairly rigid member to cause the window to move to its open position. Rotation of the handle in the opposite direction caused the chain to be with withdrawn into the casing to close the window.
It is typical in the building industry to produce a framework for numerous window panes and to provide for an 20 awning type window in the framework. A plurality of such frames would be pre-manufactured either with or without panes of glass affixed thereto and would then be shipped to building sites for installation relative to a wall of a building. To reduce the necessity for work to be conducted S. 25 at the building site it was usual to have the frame as complete as possible before shipping and this required that the awning window be in place and the frame be supplied with window pan-- In addition, it was usual for a chain winder to be fixed relative to the frame and awning window, Australian patent specifications 516007, 570809 and 66028/86 disclose prior chain winders. The winders of each of these earlier specifications each had a handle for extending and retracting the chain from a casing or housing. Where it was desired to pre-manufacture frames having a plurality of windows one of which was an awning window and including a chain winder mounted relative to the frame and window there was a difficulty in that the handle I, I could project from the frame and where a plurality of frames were arranged stacked side by side for transport there was a danger that the handle associated with the winder on one frame would contact an adjacent frame. This sometimes led not only to damage of the chain winder but also to damage of the frame. The frames were sometimes made of timber and where the handle projected beyond the frame, the handle sometimes bruised timber of the adjacent frame.
Australian Patent 621625 is directed to a folding handle for a chain winder, where the handle could fold by virtue of resilient or deformable projections which hold the knob in the used position, but where a person can manually push the knob past the projections 15 (by deforming the projections) to make the knob move to a storage position. While this handle was generally satisfactory, wear and tear tended to occur around the e* resilient projections.
We have now developed a foldable handle which may overcome the abovementiond disadvantages or provide the public with a useful or commercial choice.
In one form, the invention resides in a folding handle for a chain winder the handle having an arm for S"attachment to the chain winder, a knob attached relative to the arm, the knob being movable relative to the arm between an extended use position and a folded storage position, and biasing means to bias the knob into its use position, the knob able to be manually moved from its use position to its storage position against the bias of the biasing means.
By having a biasing means to hold the knob in its use position, there is no need to provide deformable members to achieve the same results. This in turn allows the handle to be formed from metal (for instance, diecast metal), without needing to insert, or provide deformable members.
The knob is suitably mounted to a shaft, and preferably is rotatably mounted to the shaft so that when I I I the handle is turned, the knob turns relatIve to the shaf t.
V
CC
C
The shaft may be pivotally connected relative to the arm to be movable between a first position where the knob is in its use position, and a second position where the knob is in its storage position.
The shaft suitably also exhibits a degree of linear or reciprocating movement relative to the arm.
This may be achieved by providing one or more pivot pins on either the shaft or arm which are movable along a recess in the other of the arm or shaft. The shaft may therefore be movable or reciprocatable between an extended and retracted position relative to the arm. The degree of linear movement is typically between 1mm and The biasing means may comprise a spring. The spring may be in the form of a leaf spring. The spring may cause the shaft to adopt its retracted position when the shaft is in its first position. Thus, the spring may
V*
effectively cause the knob to adopt its use position. In the retracted position, the shaft may be prevented from S' 20 pivoting from its first position, to its second position.
The biasing means, or a further biasing means may also function to assist in moving the knob from its storage position to its use position.
:.The handle may include mounting means to mount the handle to a drive shaft on the chain winder. In use, the arm preferably extends from the chain winder at an angle of between 100 and 700. The mounting means may comprise a socket which may fit over the drive shaft.
S* Typically, the socket and the drive shaft are polygonal in shape.
A resilient member may be provided to allow the handle to be press locked to the drive shaft. The resilient member may comprise a projection on one of the handle or the shaft which can fit into a recess on the other of the shaft or the handle, and which projection can be initially deformed or pushed out of the way when the two parts are press fitted together. The resilient member may comprise a spring and this spring may be -4U 4a separate from or integral with the spring which biases the shaft.
An embodiment of the invention will be illustrated with reference to the accompanying drawing.
In *e k i^ v
VT
cyS~ L L the drawing there is shown a folding handle 10 for a chain winder. Handle 10 comprises an arm 11 formed from diecast metal. A knob 12 is fitted relative to arm 11 and adjacent to a free end of arm 11. Knob 12 is movable between an extending use position as illustrated in the drawing, and a folded storage position which occurs when the knob is moved 900 in the direction of the arrow.
A biasing means in the form of a spring 13 is provided to bias knob 12 into its use position in a manner described in greater detail below.
Knob 12 is press fitted to a shaft 14. Shaft 14 is provided with an annular recess 15 in an upper part of the shaft under which can fit an annular rib 16 on an inside wall of knob 12. This, knob 12 can be formed from plastic and can be press fitted onto shaft 14. In this arrangement, knob 12 is also free to rotate about the longitudinal axis of shaft 14.
*The lower end of shaft 14 includes a pair of oppositely extending pivot pins 17 (only one shown in the 20 drawing). Pivot pins 17 extend at right angles from shaft 14 and locate within elongate recesses (not shown) in arm 11. In this manner, shaft 14 can pivot between a first position illustrated in the drawing and where knob 12 is in its use position, and a second position where shaft 14 is pivoted by 90 and where knob 12 adopts its storage position. By having pivot pins 17 slidable along the recess (not shown), shaft 14 can also exhibit a degree of reciprocal movement. Typically, the elongate recesses are between 1mm to 5mm long so that shaft 14 can adopt only a small amount of linear or reciprocal movement.
Shaft 14 is provided with a shoulder 18 adjacent pivot pins 17. Spring 13 abuts against shoulder 18. Thus, while shaft 14 can move in a linear reciprocating fashion between an extended and retracted position, spring 13 biases shaft 14 into its naturally retracted position.
In the retracted position, the lower face 19 of knob 12 abuts against an upper face 20 of arm 11, and this abutment prevents knob 12 from naturally moving from its use position to its storage position.
To move knob 12 to its storage position, knob 12 is initially manually lifted against the bias of spring 13.
This causes shaft 14 to move to its extended position again against the bias of spring 13 which in turn causes lower face 19 and upper face 20 to separate. At this stage, knob 12 can be pushed 900 to its storage position. At its storage position, shaft 14 adopts an "over-centre" position which prevents spring 13 from naturally pushing shaft 14 back to its first position. To move the knob from its storage position to its use position, a person merely needs to give it a slight push to overcome the "over-centre" arrangement, after which spring 13 will function to quickly pivot shaft 14 back to its upright first position.
Arm 11 is also provided with mounting means 21 to allow handle 10 to be fitted to a drive shaft (not shown).
:..Mounting means is in the form of an internal socket 22 which can be polygonal in shape to fit over a polygonal shaped drive shaft. A resilient member in the form of a 20 spring 23 is fitted adjacent one end wall of socket 22, and spring 23 is provided with a projection 24. The drive shaft (not shown) is provided with a corresponding recess to accept projection 24 when handle 10 is press fitted to the drive shaft. It can be seen that upon press fitting S. 25 the components together, spring 23 is initially pushed away and then biases against the drive shaft such that projection 24 locates within the recess thereby mounting the two components together.
It should be appreciated that various other changes and modifications may be made to the embodiment described without departing from the spirit and scope of the invention as claimed.

Claims (18)

  1. 2. The handle of claim 1, wherein the arm has a first end for engagement with a drive shaft on the chain winder and a second end adjacent which the knob is located.
  2. 3. The handle of claim 1 or claim 2, wherein, in 15 use, the arm extends from the chain winder at an included angle of between 100 700. el S4. The handle as claimed in any one of the preceding claims, including a shaft attached to adjacent the second end of the arm.
  3. 5. The handle as claimed in any one of the preceding claims, wherein the knob is attached to e. adjacent one end of the shaft and the shaft has another :o o end which is attached to the arm. o 6. The handle as claimed in claim 5, wherein the knob is rotatably attached to the shaft.
  4. 7. The handle as claimed in claim 6, wherein the shaft includes an annular recess and the knob has an internal recess to allow it to be fitted over the one end of the shaft and the internal recess has an annular rib which can mate with the annular recess to attach the knob to the shaft while still allowing the knob to rotate relative to the shaft.
  5. 8. The handle as claimed in any one of the claims 4 7, wherein the shaft is able to exhibit pivotal movement relative to the arm.
  6. 9. The handle of claim 8, wherein the shaft can exhibit pivotal movement between a first position wherein the knob is in its use position, and a second position where the knob is in its storage position. The handle of any one of claims 4 to 9, wherein the shaft can exhibit reciprocal movement between an extended position and a retracted position.
  7. 11. The handle of claim 10, wherein the amount of reciprocal movement is between 1 5 mm.
  8. 12. The handle of claim 10 or 11, wherein the shaft includes outwardly extending pins which can reciprocate within recesses on the arm to allow the shaft to reciprocate along the arm.
  9. 13. The handle of claim 12, wherein the pins also comprise pivot pins which allows the shaft to exhibit the pivotal movement.
  10. 14. The handle of any one of the preceding claims, wherein the biassing means comprises a spring.
  11. 15. The handle of claim 14, wherein the spring is a leaf spring.
  12. 16. The handle of claim 14 or 15, wherein the spring :...causes the shaft to adopt its retracted position when the 20 shaft is in its first position.
  13. 17. The handle of any one of claims 4 to 16, wherein the shaft is provided with a shoulder adjacent the end which is attached to the arm, and the biassing means is operatively connected to the shoulder when the shaft is in S 25 its first position.
  14. 18. The handle of any one of the preceding claims, wherein the knob must initially be pulled away from the arm to allow it so subsequently move from the use position to the storage position.
  15. 19. The handle of claim 18, wherein pulling of the knob causes the shaft to adopt its extended position against the bias of the biassing. The handle of any one of claims 2 19, wherein the first end of the arm has a mounting means to allow it to be attached to a drive shaft on the chain winder.
  16. 21. The handle of claim 20, wherein the mounting means is a socket to fit on the drive shaft.
  17. 22. The handle of claim 21, wherein a resilient I I projection is provided in the socket to allow the handle to be press locked to the drive shaft.
  18. 23. A handle substantially as hereinbefore described with reference to the accompanying drawings. DATED this Eighteenth day of October 1994. WHITCO PTY LTD By Their Patent Attorneys CULLEN CO S e *SS *ges ABSTRACT A folding handle for a window chain winder has an internal spring which locks the handle into a use position but which can still be manually moved to a folded position. e S* 9 MWIM
AU75874/94A 1993-11-17 1994-10-18 A folding handle for a chain winder Expired AU691519B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU75874/94A AU691519B2 (en) 1993-11-17 1994-10-18 A folding handle for a chain winder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPM247393 1993-11-17
AUPM2473 1993-11-17
AU75874/94A AU691519B2 (en) 1993-11-17 1994-10-18 A folding handle for a chain winder

Publications (2)

Publication Number Publication Date
AU7587494A AU7587494A (en) 1995-05-25
AU691519B2 true AU691519B2 (en) 1998-05-21

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ID=25638044

Family Applications (1)

Application Number Title Priority Date Filing Date
AU75874/94A Expired AU691519B2 (en) 1993-11-17 1994-10-18 A folding handle for a chain winder

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AU (1) AU691519B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU739414B2 (en) * 1997-09-24 2001-10-11 Assa Abloy Australia Pty Limited A folding handle for a chainwinder
AU691153B3 (en) * 1997-09-24 1998-05-07 Lockwood Australia Pty Ltd A folding handle for a chain winder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2026120A (en) * 1978-06-23 1980-01-30 Aisin Seiki Crank handle assembly
DE3333662A1 (en) * 1983-09-17 1985-03-28 Gebr. Happich Gmbh, 5600 Wuppertal Window crank
AU3609589A (en) * 1988-06-07 1989-12-14 Whitco Pty. Ltd. A handle for a chain winder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2026120A (en) * 1978-06-23 1980-01-30 Aisin Seiki Crank handle assembly
DE3333662A1 (en) * 1983-09-17 1985-03-28 Gebr. Happich Gmbh, 5600 Wuppertal Window crank
AU3609589A (en) * 1988-06-07 1989-12-14 Whitco Pty. Ltd. A handle for a chain winder

Also Published As

Publication number Publication date
AU7587494A (en) 1995-05-25

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