CN106005111A - Novel double-layer bicycle parking rack - Google Patents
Novel double-layer bicycle parking rack Download PDFInfo
- Publication number
- CN106005111A CN106005111A CN201610396660.5A CN201610396660A CN106005111A CN 106005111 A CN106005111 A CN 106005111A CN 201610396660 A CN201610396660 A CN 201610396660A CN 106005111 A CN106005111 A CN 106005111A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- vehicle frame
- bicycle
- track
- bicycle parking
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
- B62H3/00—Separate supports or holders for parking or storing cycles
- B62H3/08—Separate supports or holders for parking or storing cycles involving recesses or channelled rails for embracing the bottom part of a wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
- B62H3/00—Separate supports or holders for parking or storing cycles
- B62H3/04—Separate supports or holders for parking or storing cycles involving forked supports of brackets for holding a wheel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
A novel double-layer bicycle parking rack is of a double-layer structure and comprises a lower rack and an upper rack. The lower rack and the upper rack are connected through a transition steel plate. The lower rack comprises a bottom plate and two cable stayed columns. The upper rack comprises a rail, a lower rectangular frame, a movable rectangular frame trolley and a top cover. The rail is of an oblique face structure. One end of the rail is connected with the transition steel plate, and the other end of the rail cocks obliquely. The top cover is installed at the top of the rail. The lower rectangular frame is arranged on the lower portion of the rail and used for installing a rear wheel of a bicycle in a clamping mode. The rectangular frame trolley is installed on the upper portion of the rail, can slide on the portion, between the transition steel plate and the top cover, of the rail and is used for installing a front wheel of the bicycle in a clamping mode. The novel double-layer bicycle parking rack is of the double-layer structure, and the space utilization rate is increased; the bicycle is fixed through a clamping groove of the rectangular frame, the application range is wide, and the bicycle stability is good; the upper rack is designed to be oblique, bicycle storage and picking-up are more convenient and faster; and modular design is adopted by the parking rack, and the overall stability of the parking rack is high.
Description
Technical field
The present invention relates to cycle frame, especially effectively reduce bicycle parking area, the vehicle frame of solution parking stall shortage problem, tool
Say it is a kind of novel double-layer bicycle parking rack body.
Background technology
At present, along with climate change situation is the severeest, the idea of " energy-saving and emission-reduction, low-carbon (LC) traffic " is more rooted in the hearts of the people.
Bicycle traffic, by convenient and swift, reduce the advantage of traffic congestion, develops rapidly.But this also brings a series of society and asks
Topic.Although some area is provided with numerous bicycle parking rack, still suffer from parking stall shortage, bicycle parking difficulty is picked up the car the awkward situation being more difficult to,
And large area takies public space so that the outdoor activities region of people is narrower and small.
There are spiral, plece-cliped type and three kinds of jiffy stands of two-layer equation on existing market, but there is space availability ratio
Little, parking poor stability, complex steps, the problem such as waste time and energy.Currently, with respect to the innovation research for bicycle parking rack relatively
Few, therefore, the convenient access of design one, time saving and energy saving, the new bicycle double-layer parking frame more saving floor space has one
Fixed necessity.
Summary of the invention
The problem that it is an object of the invention to take for the public space of bicycle rack, parking stall is short, proposes a kind of novel
Double-layer bicycle parking frame.This vehicle frame uses double-decker, improves space availability ratio；Rectangle frame draw-in groove is used to fix vehicle, suitable
Wide by scope, intact stability is good；Wherein, upper-layer parking frame inclined design, access more convenient；Vehicle frame uses modularity
Design, vehicle frame stability in the large is high.
The technical scheme is that
A kind of novel double-layer bicycle parking rack, it uses double-decker, including lower floor's vehicle frame and upper strata vehicle frame, lower floor's vehicle frame with
Upper strata vehicle frame is connected by transition steel plate；
Lower floor's vehicle frame includes base plate and two oblique pull posts, and one end of two oblique pull posts is connected with the dual-side of base plate, the other end and upper strata
The both sides of the track of vehicle frame are connected, and two described oblique pull posts are for fixing the bicycle that lower floor's vehicle frame is parked；
Upper strata vehicle frame includes track, lower rectangle frame, moveable rectangle frame dolly and top cover, and described track is ramp structure,
Its one end is connected with transition steel plate, the oblique tilting of the other end, and top cover is installed at top, and lower rectangle frame is arranged on the bottom of track, uses
Filling vehicle rear wheel in card, rectangle frame dolly is arranged on the top of track, it is possible to sliding on the track between transition steel plate and top cover
Dynamic, for card entrucking front-wheel.
In lower floor's vehicle frame of the present invention: the one end being connected with transition steel plate on base plate is provided with rail groove, for placing voluntarily
The front-wheel of car.
The Double-layer bicycle parking frame of the present invention three is as one group, and the base plate of centre position vehicle frame gets on the right track the length of groove
More than being positioned at the rail groove on the base plate of two side position vehicle frames, during to avoid two side position vehicle frames all to access bicycle, interposition
The most easily-storied problem of bicycle put.
The track of the present invention is 170cm, and the dual-side at distance transition steel plate upper edge 60cm is equipped with tiltedly in orbit
Stay column, the other end of oblique pull post is fixed on the both sides in the middle part of base plate, is used for fixing lower floor's front wheel.
Lower floor's vehicle frame of the present invention, it is bolted between upper strata vehicle frame and transition steel plate.
The both sides of the upper strata vehicle frame of the present invention are provided with the junction steel plate for connecting adjacent carrier, on each junction steel plate all
It is provided with screw；Described junction steel plate is arranged at orbital distance transition steel plate upper edge 100cm.
The wheelbase of the rectangle frame dolly of the present invention is 26-30cm.
The track of the present invention uses C-type steel；The inclined-plane of track and the angle of horizontal plane are 35-45 degree.
The lower rectangle frame of the present invention is by the end face of transition steel plate, the track of both sides change and the end face one of distance transition steel plate
The steel bar of set a distance encloses to connect and forms, and afore-mentioned distance is 25-32cm.
The rectangle frame dolly of the present invention includes two wheel guards, is arranged on the two bearings bottom two wheel guards and each axle
Holding the wheel of both sides, aforementioned wheel drives rectangle frame dolly to roll in orbit.
Beneficial effects of the present invention:
The novel double-layer bicycle parking rack of the present invention.This vehicle frame uses double-decker, improves space availability ratio；Use rectangle frame
Draw-in groove fixes vehicle, applied widely, and intact stability is good；Wherein, upper-layer parking frame inclined design, access convenient soon
Prompt；Vehicle frame uses modularized design, and vehicle frame stability in the large is high.
Accompanying drawing explanation
The vehicle frame overall structure figure of Fig. 1 present invention.
The rectangle frame vehicle structure of Fig. 2 present invention.
The frame module graph structure figure of Fig. 3 present invention.
Wherein: 1, base plate；2, rail groove；3, oblique pull post；4, lower rectangle frame；5, steel bar；6, rectangle frame dolly；7, top cover；
8, junction steel plate；9, track；10, transition steel plate；6-1, bearing；6-2, wheel；6-3. wheel guard.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, the present invention is directed to the shortcoming of existing jiffy stand, carry out following Curve guide impeller: existing double-deck bicycle
During the access bicycle of jiffy stand upper strata, need to repeatedly on put slidably this process of drawing frame of drawing, complex steps, time-consuming take
Power.
For simplifying upper strata bicycle parking step, upper strata bicycle rack being designed as ramp structure, upper-layer parking frame stops with lower floor
Frame is connected by transition steel plate；Lower floor's vehicle frame fixes lower floor's bicycle by oblique pull post；Upper strata bicycle parking rack is inclined-plane knot
Structure, simplifies access step, time saving and energy saving；Levels vehicle frame is connected by transition steel plate.The fixing of upper strata bicycle is by voluntarily
Two wheels of car sink enough degree of depth in rectangle frame respectively.Fixing front-wheel by rectangle frame dolly, lower rectangle frame is fixed
Trailing wheel.
During vehicle frame zero load, rectangle frame dolly relies on self gravitation to slide to vehicle frame bottom；When front wheel is placed in rectangle
During frame dolly, applying thrust, rectangle frame dolly can drive bicycle to move up along track.
For ensureing vehicle frame overall structure stability, bicycle rack being designed as modular structure, three is an entirety, such as Fig. 3
Shown in.Weld steel bar in the C-type steel side of upper strata vehicle frame and be bolted each vehicle frame.But, in an intermediate position
It is likely to be due to lower floor's storing bicycle the most of both sides vehicle frame during lower floor's vehicle frame, causes and be not easy storage problem.Thus, design exists
The rail groove of the base plate of lower floor's bicycle rack in centre position is longer so that when bicycle advances very short distance, and front-wheel enters rail
In road groove, bicycle tail frame can be promoted subsequently, bicycle is parked on lower floor's jiffy stand completely.
The key technical indexes
Parameter index:
1. rectangle frame dolly is 6mm rod iron by 4 7209A bearings, 2 root radiuses, the steel plate composition of 2 pieces of 300mm*100mm, 2
Rod iron as the bearing axle of rectangle frame dolly, other 2 block plate inflexible wheel bases, and as the critical component of clamping front-wheel；
2. current, bicycle tyre size major part is maintained at 26 inches, about 66cm, for firm upper strata bicycle, it is necessary to
Ensure that the distance being trapped in rectangle frame under front wheel is enough deep, so the wheelbase 28cm of design rectangle frame dolly；Similarly, exist
Distance 28cm position, transition steel plate 10 upper edge, C-type steel bottom surface, welds steel bar, forms lower rectangle with transition steel plate 10 upper edge
Frame.
The a length of 170cm of 3.C shaped steel, designs oblique pull post at C-type steel 60cm, is used for fixing lower floor's front wheel；?
Steel plate strip is set at 100cm, punching, it is used for connecting each vehicle frame.
Characteristic index:
1. stress: while bearing cross force and longitudinal force, simulating vehicle frame by inner maximum is transition steel plate 10 and C-shaped channel
Steel junction, for 8.6Mpa, and vehicle frame global displacement maximum amount of change 2.532mm, meet Vehicle Frame Design requirement；
2. space availability ratio: when parking cars, unit parking floor space is 0.32 m, much smaller than the jiffy stand of other kind；
3. power consumption: upper-layer parking frame stops and does work is 244.32J, much smaller than conventional double jiffy stand；
4. cost: amount of money 60-75 unit needed for single parking stall, raw much smaller than conventional double jiffy stand domestic bicycle rack manufacturer
The bicycle parking rack producing design includes spirally, plece-cliped type and Double-deck type bicycle parking frame.
Technical analysis:
Inquired about by web material and on-site inspection, obtain exit spiral type jiffy stand 2m/ group (length), wide 550mm, 6-7 parking
Position, total price 150-200 unit；Plece-cliped type jiffy stand 2m/ group (length), a width of 550mm, 5 parking stalls, total price 120-160 unit；Double-deck
Formula jiffy stand 750-850/m, 2m can park 10 bicycles, and 3m can park 14, the length of an a width of bicycle；Novel double
Layer jiffy stand calculates price according to number of units, and total price 120-150 unit, the distance between vehicle frame is 2/3 handlebar (handlebar distance 570-
600mm), parking 10 bicycles for 380-400mm, 2m, 2.8m parks 14 bicycles.
Comparing for convenience, if bicycle length 1.6m, wheel and ground friction coefficient are 0.71, bicycle amount 12Kg.Former
Double-deck vehicle frame upper strata is deposited center of gravity and is risen 1.2m, and existing double-deck frame mass centre rises 0.9m.The computing formula of this research is defined as follows.
It is computed drawing following table, such as table 1.
S1=A*B/ C ；S2=A*L/C ；L1=L；M1=M/ C
Wherein, the intrinsic floor space in S1--unit parking stall；Length often organized by A--vehicle frame；B--width；C--parking stall number；
Unit parking floor space when S2--parks cars；L--bicycle length；Exceptional space length when L1--picks and places vehicle；M--is every
Group parking stall total price；The amount of money needed for the single parking stall of M1--
W=9.8*m*H+l*F； F=μ* N
Wherein, W storing bicycle wasted work；H bicycle center of gravity lifting height；μ coefficient of friction；N bicycle is by ground
Holding power；M bicycle weight；L bicycle storing forward travel distance
Part that the present invention does not relate to is the most same as the prior art maybe can use prior art to be realized.
Claims (10)
1. a novel double-layer bicycle parking rack, is characterized in that it uses double-decker, including lower floor's vehicle frame and upper strata vehicle frame,
Lower floor's vehicle frame and upper strata vehicle frame are connected by transition steel plate (10)；
Lower floor's vehicle frame includes base plate (1) and two oblique pull posts (3), and one end of two oblique pull posts (3) is connected with the dual-side of base plate (1),
The other end is connected with the both sides of the track (9) of upper strata vehicle frame, and two described oblique pull posts (3) are for fixing what lower floor's vehicle frame was parked
Bicycle；
Upper strata vehicle frame includes track (9), lower rectangle frame (4), moveable rectangle frame dolly (6) and top cover (7), described track
(9) being ramp structure, its one end is connected with transition steel plate (10), the oblique tilting of the other end, and top cover (7), lower rectangle are installed in top
Frame (4) is arranged on the bottom of track (9), is used for card dress vehicle rear wheel, and rectangle frame dolly (6) is arranged on the top of track (9), energy
Slide, for card entrucking front-wheel on enough tracks between transition steel plate (10) and top cover (7).
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that in lower floor's vehicle frame: base plate (1) upper with
One end that transition steel plate (10) connects is provided with rail groove (2), for placing the front-wheel of bicycle.
Novel double-layer bicycle parking rack the most according to claim 2, is characterized in that Double-layer bicycle parking frame three work
Being one group, the base plate (1) of centre position vehicle frame gets on the right track the length of groove (2) more than being positioned on the base plate (1) of two side position vehicle frames
Rail groove (2), during to avoid two side position vehicle frames all to access bicycle, the most easily-storied problem of bicycle in centre position.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that track is 170cm, in orbit away from
Dual-side away from transition steel plate (10) upper edge 60cm is equipped with oblique pull post, and the other end of oblique pull post is fixed in base plate (1)
The both sides in portion, are used for fixing lower floor's front wheel.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that lower floor's vehicle frame, upper strata vehicle frame and transition
Steel plate is bolted between (10).
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that the both sides of upper strata vehicle frame are provided with use
In the junction steel plate (8) of connection adjacent carrier, each junction steel plate is equipped with screw on (8)；Described junction steel plate (8) is arranged on
At orbital distance transition steel plate (10) upper edge 100cm.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that the wheelbase of rectangle frame dolly (6)
It is 26-30cm.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that track (9) uses C-type steel；Track
(9) inclined-plane is 35-45 degree with the angle of horizontal plane.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that lower rectangle frame (4) is by transition steel plate
(10) track (9) that end face, both sides become and the steel bar (5) of the end face certain distance of distance transition steel plate (10) enclose connect and
Becoming, afore-mentioned distance is 25-32cm.
Novel double-layer bicycle parking rack the most according to claim 1, is characterized in that rectangle frame dolly (6) includes two cars
Wheel baffle plate (6-3), the two bearings (6-1) being arranged on two wheel guards (6-3) bottom and the wheel of each bearing (6-1) both sides
(6-2), aforementioned wheel (6-2) drives rectangle frame dolly (6) in the upper rolling of track (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396660.5A CN106005111B (en) | 2016-06-07 | 2016-06-07 | A kind of novel double-layer bicycle parking rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396660.5A CN106005111B (en) | 2016-06-07 | 2016-06-07 | A kind of novel double-layer bicycle parking rack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106005111A true CN106005111A (en) | 2016-10-12 |
| CN106005111B CN106005111B (en) | 2018-11-16 |
Family
ID=57089811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610396660.5A Expired - Fee Related CN106005111B (en) | 2016-06-07 | 2016-06-07 | A kind of novel double-layer bicycle parking rack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106005111B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108248723A (en) * | 2018-02-12 | 2018-07-06 | 辽宁工业大学 | A kind of slidingtype bicycle parking rack and its fuzzy matching parking method |
| CN108331387A (en) * | 2018-05-03 | 2018-07-27 | 辽宁石油化工大学 | A kind of Double-layer intelligent bicycle access device |
| CN108725632A (en) * | 2018-08-02 | 2018-11-02 | 西华大学 | A kind of two-way jiffy stand of dislocation |
| CN108945179A (en) * | 2018-06-05 | 2018-12-07 | 西安理工大学 | A kind of bicycle parking device |
| CN109383666A (en) * | 2018-11-09 | 2019-02-26 | 华侨大学 | A kind of convenient aid parking mechanism of bicycle |
| CN109403677A (en) * | 2018-12-21 | 2019-03-01 | 上海市城市建设设计研究总院（集团）有限公司 | The double-deck bicycle rack |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19515703A1 (en) * | 1995-04-28 | 1996-10-31 | Hella Johannsen | Breakdown aid, esp. for bicycle |
| DE29921763U1 (en) * | 1999-12-11 | 2000-02-24 | Eisen- Und Drahtwerk Erlau Ag, 73431 Aalen | Parking facility for bicycles |
| JP2000179172A (en) * | 1998-12-14 | 2000-06-27 | Nishimura Kikaku:Kk | Bicycle parking device |
| CN2639132Y (en) * | 2003-02-28 | 2004-09-08 | 上海创尼科技有限公司 | Two-section stand of bicycle |
-
2016
- 2016-06-07 CN CN201610396660.5A patent/CN106005111B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19515703A1 (en) * | 1995-04-28 | 1996-10-31 | Hella Johannsen | Breakdown aid, esp. for bicycle |
| JP2000179172A (en) * | 1998-12-14 | 2000-06-27 | Nishimura Kikaku:Kk | Bicycle parking device |
| DE29921763U1 (en) * | 1999-12-11 | 2000-02-24 | Eisen- Und Drahtwerk Erlau Ag, 73431 Aalen | Parking facility for bicycles |
| CN2639132Y (en) * | 2003-02-28 | 2004-09-08 | 上海创尼科技有限公司 | Two-section stand of bicycle |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108248723A (en) * | 2018-02-12 | 2018-07-06 | 辽宁工业大学 | A kind of slidingtype bicycle parking rack and its fuzzy matching parking method |
| CN108248723B (en) * | 2018-02-12 | 2024-01-12 | 辽宁工业大学 | Sliding type bicycle parking frame and fuzzy matching parking method thereof |
| CN108331387A (en) * | 2018-05-03 | 2018-07-27 | 辽宁石油化工大学 | A kind of Double-layer intelligent bicycle access device |
| CN108945179A (en) * | 2018-06-05 | 2018-12-07 | 西安理工大学 | A kind of bicycle parking device |
| CN108945179B (en) * | 2018-06-05 | 2020-06-26 | 西安理工大学 | Bicycle parking device |
| CN108725632A (en) * | 2018-08-02 | 2018-11-02 | 西华大学 | A kind of two-way jiffy stand of dislocation |
| CN109383666A (en) * | 2018-11-09 | 2019-02-26 | 华侨大学 | A kind of convenient aid parking mechanism of bicycle |
| CN109403677A (en) * | 2018-12-21 | 2019-03-01 | 上海市城市建设设计研究总院（集团）有限公司 | The double-deck bicycle rack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106005111B (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106005111A (en) | Novel double-layer bicycle parking rack | |
| CN105730954A (en) | Stacking RGV | |
| CN201205935Y (en) | Liftable double-layer single car pavilion | |
| CN202611298U (en) | Basket type car double-deck parking device | |
| CN202544446U (en) | Three-dimensional parking space equipment with rotary car-carrying plate | |
| CN106013893B (en) | A kind of guide rail integrates vehicle-carrying plate | |
| CN110847650A (en) | Double-layer parking system for non-motor vehicle | |
| CN201086753Y (en) | Double-layer type bicycle carrier | |
| CN108425523B (en) | Shared bicycle storage and transfer system | |
| CN210338124U (en) | Parking and taking parking space for electric vehicle | |
| CN212078835U (en) | Double-deck exchange track | |
| CN114379638A (en) | Electronic shopping guide device of shopping center | |
| CN204531533U (en) | A kind of compact multi-storied garage | |
| CN203947830U (en) | A kind of two layers of circulation parking apparatus | |
| CN206110756U (en) | Utilize 360 degrees samsara moving multilayer garage parkings | |
| CN208263286U (en) | A kind of Novel EVA secondary frothing forming machine | |
| CN206971838U (en) | A kind of mobile device suitable for double-layer parking field top layer | |
| CN206233659U (en) | A kind of mobile three-dimensional parking garage | |
| CN207917022U (en) | A kind of slidingtype bicycle parking rack | |
| CN222295860U (en) | A multi-storey parking garage for two-wheeled vehicles | |
| CN205875846U (en) | Integrated sweep that carries of guide rail | |
| CN103771068B (en) | Intelligent obstacle-free and stereoscopic access device with all degrees of freedom | |
| CN204212475U (en) | A kind of parking space of multi-storied garage | |
| CN218862227U (en) | Vehicle carrying device of vertical lifting stereo garage | |
| CN219728412U (en) | Goods shelves fixed knot constructs behind year thing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 Termination date: 20210607 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |